EDP70 UNINTERRUPTIBLE POWER SYSTEM TECHNICAL...

TECHNICAL MANUALPART NUMBER 10B52041PT1C rev. 5

EDP70 Technical Manual –– MI92/10015 –– Ed. 5 –– 05/97 page 1 of 163

EDP70

UNINTERRUPTIBLE POWERSYSTEM

TECHNICAL HANDBOOK

The copyright of this handbook is the property of Chloride Power Electronics Limited.The information contained herein may not be copied, communicated to a third person nor storedin a data retrieval system without agreement in writing from Chloride Power ElectronicsLimited.In pursuing a policy of continuous product development we reserve the right to vary productdesign, specification or components without prior notice.Whilst every effort has been made to ensure the accuracy of the information in this handbook,Chloride Group PLC cannot be made liable for any errors, incidental or consequential damages.

This manual includes:– the description of the software used up to FSB = 29

and the one used from FSB = 30

CHLORIDESILECTRON

Via Umbria, 6I – 40060 Osteria Grande BOITALY

Tel. (++39) (+51) 6959111Fax. (++39) (+51) 945634

EDP70 Technical Manual –– MI92/10015 –– Ed. 5 –– 05/97page 2 of 162

CONTENTS

1 SAFETY

1.1 General

1.2 Electric shock

1.3 Safety warning

2 MAINTENANCE PROCEDURES

2.1 Tools & Test equipment

2.2 Procedures

2.3 Fuse blowing

2.4 Fans replacement

3 POWER ASSEMBLY DESCRIPTION

3.1 Input choke / Input autotransformer

3.2 Rectifier Assembly

3.3 DC choke

3.4 DC capacitor

3.5 Inverter Assembly

3.6 Static Switch Assembly

3.7 Display pcb Assembly

4 CONTROL LOGIC DESCRIPTIONS

4.1 Rectifier control pcb

4.2 Inverter pcb

4.3 Static Switch pcb

4.4 Display pcb

4.5 Interface pcb

4.6 Base drive pcb

4.7 S.M.P.S. PCB


5a SOFTWARE FUNCTIONAL DESCRIPTION(for UPS having FSB status < 30)

5a.1 General

5a.2 Accessing information

5a.3 Measurements

5a.4 Alarm Message and digital output

5a.5 Buzzer

5a.6 LEDs

5a.7 Inverter Stop/Start

5a.8 RAU & AS400 outputs

5a.9 POWER HISTORY

5a.10 Battery autonomy

5a.11 RS232 port

5a.12 Inverter Voltage control

5a.13 Display Board trip settings

5a.14 DIL Switch settings


5b. SOFTWARE FUNCTIONAL DESCRIPTION(for UPS having FSB status > = 30)

5b.1 GENERAL

5b.2 ACCESSING INFORMATION

5b.3 MEASUREMENTS

5b.4 ALARM MESSAGE AND DIGITAL OUTPUT

5b.5 BUZZER

5b.6 LEDS

5b.7 INVERTER STOP/START

5b.8 DATA STORAGE METHOD DESCRIPTION

5b.9 RECTIFIER STARTUP CONTROL

5b.10 RAU & AS400 OUTPUTS

5b.11 POWER HISTORY

5b.12 BATTERY AUTONOMY

5b.13 RS232 PORT

5b.14 INVERTER VOLTAGE CONTROL

5b.15 DISPLAY BOARD TRIP SETTINGS

5b.16 DIL SWITCH SETTINGS

6. TROUBLE SHOOTING

6.1 TROUBLE SHOOTING (for UPS having FSB status < 30)

6.2 TROUBLE SHOOTING (for UPS having FSB status > = 30)

7 MAINTENANCE

7.1 Periodical maintenance

7.2 Float voltage settings

8 CIRCUIT DIAGRAMS


Chap 1 = SAFETY

1 SAFETY

1.1 General

The interior of an EDP70 cubicle, when it is installed has hazardous AC and DCvoltages on exposed terminals and printed circuit boards, even when all theswitches are OFF.The control logic, which is traditionally supplied by low voltage, has low powerpart of this type of equipment powered by 5V and +12V logic power supplieswhich are referenced to potentials other than earth zero volts so that highvoltages with respect to earth exist on some circuit boards in the equipment.With all supplies isolated the battery (288V or 396V DC) is still live andappropriate precautions must be taken.

1.2 Electric Shock

Switch off the supply or use dry insulating material to protect yourself whilepulling the casualty clear of any conductor.

DO NOT TOUCH THE CASUALTY WITH YOUR BAREHANDS UNTIL HE IS CLEAR OF ANY CONDUCTOR.

SEND IMMEDIATELY FOR TRAINED, QUALIFIED HELP.


Chap 1 = SAFETY

1.3 Safety Warning

1) If either the AC supply or the batteries are connected, do not remove theaccess covers unless you have undergone a Chloride approved trainingcourse.

2) Arrange safety cover. Ensure somebody is available to isolate the electricitysupply if necessary.

3) Stand on an approved rubber insulating mat when working on the equipment.WARNING ! : Some rubber mats contain a carbon based pigment and arenot suitable!

4) Remove watches, rings earrings and other metal jewellers and any loose metalpens, tools or metal objects from pockets before working on the equipment.

5) Do not touch printed circuit boards, except in ’Bypass’ mode. High voltagesexist, there is an electric shock hazard.

6) Use only insulated tools.

7) Batteries contain ACID, which is poisonous and corrosive. It can cause burnson contact with skin and eyes. If acid is spilt on clothes or gets into eyes, washwell with plenty of clean water.Batteries can give off EXPLOSIVE gases. Keep sparks, flames and lightedcigarettes away.

Batteries are ELECTRICALLY LIVE at all times.Even if the case is damaged they are still capable of supplying high shortcircuit currents.

IN ALL CASES SEEK IMMEDIATE MEDICAL ATTENTION!


Chap 2 = MAINTENANCE PROCEDURES

2 MAINTENANCE PROCEDURES

2.1 Tools and Test Equipment

In addition to the usual hand tools, the following equipment is needed:–

1) Oscilloscope. Dual beam, at least 15MHz band width.This should be a fully floating earth type because it will be used to measuresignals with reference to potentials other than earth.

2) Digital multimeter. This must be accurately calibrated.

3) A fused in–line wire link with adaptor.

4) Protective insertion and removal tools for handling CMOS integrated circuitswhich are susceptible damage from incorrect handling.

2.2 Procedures

When troubleshooting in this equipment remember that high voltages exist onprinted circuit boards and on exposed terminals. Therefore do not touch anycomponent until you have checked it is safe.When monitoring test points, always switch to BYPASS mode to fit the probe ormeter, then switch to an operating mode to make the observation. Finally returnto BYPASS to remove the measuring instrument. This will avoid inadvertentfuse blowing from spurious signals.



2.3 Fuse Blowing

NOTE ! The machines are equipped by circuit breakers only.No fuses are fitted as reliance is placed on the installation.

1) Switch to bypass mode. Wait 3 minutes.

2) Check all the switches, excepted By–Pass, are OFF, and remove the batteryfuse.

3) Use a multimeter to check all the power components in the inverter includingsnubbers, power transformer and filter circuits (refer to section 3 of manual).

4) When power components are verified, disconnect base drive (plugs PL10–13)

5) Turn on main switch. Verify DC rail voltage, and that the control and drive logicis working correctly (refer to section 5 of manual).

6) Switch off main switch. Wait 3 minutes.

7) Refit battery fuse F2 and base drive connectors.If F2 was faulty replace it.

8) Start up the equipment.



2.4 Fans replacement

Driver board

holes for Driver board

1 – Remove the Driver following the arrow

2 – Unscrew the fan’s support screw

3 – Remove the fan following the arrow

Fan support fixing’s screw

Procedure for fans replacementon UPS ratings 30 or 40 kVA


Chap 3 = POWER ASSEMBLY DESCRIPTION

3 POWER ASSEMBLY DESCRIPTION

The UPS described here is a machine which guarantees uninterrupted powersupply to the load both with or without the primary supply voltage, even whenhandling the most rigorous and sophisticated load.Therefore this system is used as an interface between the mains supply and usersrequiring an uninterrupted energy source.The UPS, is made up of the following functional subsets:



BATTERY CHARGER–RECTIFIER

The rectifier converts the mains ac voltage into DC voltage in order to feed theinverter and the battery.

INVERTER

The inverter transforms the DC voltage supplied by the rectifier, or the battery intoac voltage for feeding the load.

STATIC CHANGEOVER SWITCH UNIT

The static changeover switch transfers the power supply to the load, without anyloss of continuity, from the inverter to the reserve supply and viceversa every timethe power supply characteristics stray beyond the tolerances accepted by the load.Essentially, the static changeover switch is composed of:

a) an inverter static switch comprising 3 pairs of thyristors connected inanti–parallel in the inverter output.

b) a reserve static switch comprising 3 pairs of thyristors connected inantiparallel in the reserve line.

c) Logic control and command which carries out the following functions:

– driving the thyristors of one of the static switches, according to the logicdescribed below.

– checking the reserve and inhibiting the reserve static switch if the latter straysbeyond the parameters permitted by the load.

– checking the inverter output, ordering the load to be transferred onto thereserve network when the latter is beyond the parameters permitted by theload, or when the current required by the load persists in exceeding themaximum value permitted by the inverter.

Under normal working conditions the static changeover switch supplies the loadfrom inverter output (privileged power source).If an anomaly occurs, fast sensors order the load to be switched over to reserve, ifthis is necessary.A short circuit in the output of the unit automatically causes the load to beswitched over to reserve; if the latter is not available, or is unsuitable. the unitprotects itself and guarantees correct supply to the load only if the short circuit iseliminated by fuses of a size sufficient to effect correct selection of the protectionsystems.



Power Assembly description:

The EDP70 comprises the following main assemblies:

1) Input Choke / Input Autotransformer L1 / AT1

2) Rectifier Module

3) DC Choke L2

4) DC Smoothing Capacitors CE

5) Inverter Module,Inverter Transformer T2,AC choke (not needed if integratedmagnetics fitted.),Filter Capacitor C2

6) Static Switch Module

7) Display Module

3.1 Input Choke / Input Autotransformer

These devices make a separation of the main supply from the distortion generatedby the rectifier.The autotransformer, fitted on the rating up to 20kVA only, adapts the voltagelevel.



3.2 Rectifier Assembly

In a three phase system the rectifier is a fullwave phase controlled bridge utilizing6 thyristors. This assembly converts the AC power into voltage regulated DCpower. Regulation is accomplished by controlling the conduction angle of thethyristors.This function is controlled by the rectifier control board which samples the actualDC output via an isolation amplifier on the interface pcb, compares it with areference to determine the error and adjusts the duration of the thyristor ’ON’periods to attain the correct DC voltage.The battery current is sensed by a hall effect current transformer. This is used tolimit battery current and monitors discharge.Rectifier control board (See also section 4.1), also produces the gate drive pulsevia the interface pcb to turn on the 6 thyristors.

3.3 DC Choke

The choke L2, fitted on the rating up to 20kVA only, in conjunction withcapacitor CE forms a low–pass filter circuit. On the ratings above 20kVA this isdone by the AC choke L1.This provides the voltage smoothing and current ripple reduction on the DCsupply which is necessary to ensure correct operation of the inverter.The current to the battery is smoothed again by the saturable choke L3, assuringthen a trouble free battery charging.

3.4 DC Capacitor

A bank of electrolytic capacitors CE in conjunction with the DC choke form afilter as above described.Resistors in the inverter bridge are fitted across the bank to ensure safe dischargeof these capacitors when the UPS is OFF (allow 3 minutes for discharge).



3.5 Inverter Assembly

The power AC waveform is constructed by pulsing chopped DC through theprimary of transformer T2.The induced waveform in the secondary is an AC voltage at the inverterfrequency 50 or 60Hz but superimposed on top of this are AC voltages athigher frequencies, giving a slight ripple. This ripple is attenuated by C2.The chopped DC waveform is generated using pulse width modulation. Thesample of inverter output is compared with a synthesized waveform. An erroramplifier ”closes” the loop giving a full servo controlled system. The choppingfrequency across the primary is 64 times the output frequency.i.e 50 x 64 = 3200Hz (for 50Hz output).Six power darlington transistors are configured around the primary winding ofthe inverter transformer in such a way that the current DC bus may be pulsedthrough the inverter primary in either direction by turning on the appropriatepair of these solid state switches.Each switch is turned on by current applied to the bases. Rapid turn off is ensuredby the control logic negatively biasing both bases to drain away the chargestored in the transistor junction.The inverter pcb generates the inverter drive signals and the signals to levelssuitable for driving power transistors. A switch mode power supply is used toderive a regulated logic power supply from the DC bus. This allows theinverter to be started whenever the DC bus is live without needing the rectifierto be on (during a power failure for instance).

3.6 Static Switch Assembly

The static switch is a make–before–break changeover switch which has nomoving parts. It uses thyristors as the power switching elements, triggering bysignals from the static switch control board.The control logic is configured such that normally it connects the inverter toload but in the event of an overload or malfunction, it can transfer the load to thereserve supply without interruption. In order to avoid phase jumps or reversals theinverter is synchronized and phase locked to the reserve.

3.7 Display Assembly

This assembly drives the front panel displays, the audible alarm remote alarmunit, RS232 and AS400 alarm interfaces.This pcb also monitors the state of the system, performs some control, logic anddisplay functions.


Para 4.1 = Rectifier Control Pcb

4 CONTROL LOGIC DESCRIPTIONS

4.1 Rectifier Control Pcb

Refer to circuit diagram 04.11.240 become 15C90073

This circuit converts a 3 phase input supply to a stabilized D.C. rail. Achievedusing a 6 pulse controlled rectifier.

Power Circuit:

The three–phase AC main, through a high reactance star connectedauto–transformer or an AC choke, supplies a fully controlled 3 phase thyristorrectifier. The DC filter choke and the integrated AC chokes have beenoptimized to reduce harmonic distortion of the input current waveform. Isolatedcurrent feedback is derived from a hall effect current sensor in the battery lead.Voltage feedback is derived via impedance buffer amplifiers assuring electricalisolation > 300 kΩ.

Control Circuit:

The main functions of the control circuit are:

– Provide firing pulses for the thyristor bridge giving a regulated DC rail,– Battery current limited to values from 1.5 to 30A (selectable)– Firing pulses inhibited under the following conditions:–

– REMOTE SHUTDOWN facility activated,– INCORRECT connection of input supply (PHASE ROTATION error),– PHASE FAIL.

– Battery test facility, reducing the rectifier output voltage by 20%,– Soft start ensures D.C. rail ramps up over a period of 10 seconds.



Power Supply:

This is derived from the primary of the main three phase autotransformer via T6,T7 and T9 (mounted on the Transformers board and connected in starconfiguration). The transformer secondaries are fed into a full wave rectifiercircuit formed by diodes D4 to D9. This provides an unregulated DC railsmoothed by C4. REG1 is a 5V regulator used to power all subsequent circuits.C5 decouples the output of REG1.

Firing Angle Generation:

The 3 phase input sample is taken from the secondaries of T6, T7 and T9(mounted on the Transformers board) attenuated and put on a 2.45V level. Thereduced signals are fed into 3 crossing detectors (IC1a, b & c), each detectorcompares two of the waveforms. The outputs of each of these is a square wavecorresponding to the cross over of two of the phases (See Fig 1). The phasecrossing square waves are then applied to 3 EXOR gates (IC 6), again each gatecompares two of the signals. The resultant pulses correspond to the requiredfiring ranges.The EXOR gates have open collector outputs which when activated provide adischarge path for a 100nF capacitor (C6, C7 & C8). With output deactivatedthe capacitor is allowed to charge through a 100K resistor (R35, R38 & R45).The time constant of the RC is much greater than the firing range pulse thus a rampgenerator is formed.Ramp signals are fed into a further three comparators (IC2 a, b, c) together witha common demand signal resulting in an output pulse with width proportional tothe demand signal and in the correct time slot. These pulses are fed into acustom logic array which steers them to the appropriate gate drive circuit.Figure 2 shows some of the outputs for firing angle less than 60 degrees. Figure 3shows the outputs for a firing angle greater than 60 degrees.The isolated gate drive circuits are positioned on the interface board. At theheart of these circuits are optically isolated triacs. Resistors R59 to R64 set thedrive current for the opto–triacs to 10mA.



R

R

Line to neutralVoltages

Y B

R>Y

Y>B

B>R

ZeroCrossingDetectors

Firing

Ranges

OP’s fromRampGenerators

Firing Pulsesfor ”B” input ofLogic Array

R>Y XOR B>R

Y>B XOR R>Y

B>R XOR Y>B

VoltageDemand

Y

B

Fig. 1Timing Diagram for Firing Angle Control



R

G1 : Pin 19

G2 : Pin 18

G3: Pin 17

G4: Pin 16

Y B

Firing

Pulse

for G2

Output of

Logic

Array

Fig. 2Firing Pulses for firing angle less than 60º



R

G1: Pin 19

G2:pin 18

G3: Pin 17

G4: Pin 16

Y B

Firing

Pulsefor G2

Output of

LogicArray

Fig. 3Firing Pulses for firing angle greater than 60º



Voltage Control Loop:

Voltage feedback is via a high impedance buffer amplifier on the interface PCB.The voltage feedback signal is scaled to 2.2V at nominal output voltage, andfed into the non–inverting input of IC3d configured as a frequencycompensated error amplifier comparing the feedback signal with a reference setby VR1. An increase in the output reduces the DC rail voltage.

Soft Start:

This circuit ensures that at switch on the DC rail ramps up slowly over a period ofapproximately 10 seconds.The circuit, formed round IC3c acts as a virtual capacitor exhibiting anequivalent capacitance 100 times that of C3 at the junction of R14 and R15. Atswitch on the virtual capacitor charges through R15 to the 2.45V reference levelwhich is buffered to the output of IC3 suppling the voltage reference pot VR1.

Battery Test:

To test the batteries the DC voltage is reduced by 20%.This test is initiated by the microprocessor controlled display driver PCB.Under test conditions PL6/12 is pulled low causing the output of IC4a to changestate connecting R17 to 0v forming a potential divider with R26 which reduces thereference voltage seen by the virtual capacitor circuit.Charge is taken out of C3 reducing the voltage across VR1 and hence thereference to the voltage feedback amplifier.When PL6/12 is released R17 is switched out and the charge on C3 increases, theoutput voltage ramps up to the nominal level.



Current Limit:

This circuit, which is built around IC3b, limits the battery charge current to valuesfrom 1.5A to 30A, depending on the status of SW1 (see table on schematicdiagram).Working like the battery test by reducing the charge on C3.IC3b forms a frequency compensated error amplifier. The non–inverting inputis connected to a reference. Current–feedback signal is connected to theinverting input, if it is higher than the reference level the output of the amplifiergoes low rapidly discharging the virtual capacitor circuit via D1 and R11. Whenthe current limit is released the output voltage again ramps up slowly.

Trips and inhibit:

Pin 8 of the custom logic array is configured as an active low inhibit input, it isalso connected via an inverter (IC6d) to the gate of FT1. With the inhibit linelow, FT1 is switched on discharging C3 resetting the soft start.The inhibit line can be pulled low by any one of the following trips:

– Rectifier Shutdown:

This operates when PL6/13 is pulled low, it is connected to a simple comparatorcircuit which switches low inhibiting the system. This function is controlleddirectly from:

– the display control board– the Interface board (EPO, VDC HIGH, RESERVE HIGH/LOW).



– Phase Fail/Rotation:

This circuit ensures that the 3 phase supply has been correctly wired or if therehas been a phase failure.An unbalanced star load is connected across the supply sample (R48, R49,R50 and C8). Under normal conditions an AC signal appears at the star point ofthe load. This signal is rectified and smoothed by D10 and C10. The smoothedlevel is attenuated by R51 and R52 and fed into the non–inverting input ofcomparator IC1d. The inverting input is connected to a 2.75 reference level.Under fault conditions the signal at the star point reduces causing the voltage at thenon–inverting of IC1d below 2.75V which switches the output low setting theinhibit line low via the rectifier shutdown comparator.

Temperature Compensation:

A temperature sensor (IC7) provides temperature compensation in the feedbackloop. It is designed so that the output voltage of the system is reduced as thetemperature rises.This ensures maximum battery life is achieved.


Para 4.2 = Inverter Drive Board

4.2 Inverter Drive board

Refer to circuit diagram 15C70512

4.2.1 Frequency generation:

The frequency generator uses a crystal QZ1, and pins 9 and 12 of IC17. Thesetogether generate a frequency of 2.4576 MHz which is fed into IC17 pin 1 as aclock. The output of IC17 pin 16 is the clock frequency divided by 6 (or divided by5 if SW1.2 is OFF). This frequency is 409.6kHz (419.52kHz) and is fed into thebinary divider IC18. The output at TP5 is 50Hz (60Hz) and is fed back into IC17 asa stable 50Hz reference frequency which is used if the reserve supply is out oflimits. If the reserve is healthy then the reserve zero crossing detector output isused as the frequency for the inverter. In either case, the selected waveformappears at IC17 pin 15.The selection is made depending on the condition of the reserve. If RES FAILinput is active (HIGH) then the 50Hz reference at IC17 pin 2 is used. Otherwise,the reserve zero crossing detector output at IC17 pin 5 is used. In a system wherethe static switch board is not fitted, opening SW1.1 forces the signal at IC17 pin 2to be used as no reserve zero crossing detector circuit is present.The signal out of IC17 pin 15 is used as the frequency reference for thephase–locked–loop (P.L.L.). The feedback for the P.L.L. comes from IC17 pin 14,which represents the actual frequency of the inverter. If the inverter voltage is notlow and the reserve static switch board is present (SW1.1 ON) then this signal istaken from the inverter zero crossing detector output connected to PL4 pin 17.Otherwise it is taken from the 50Hz output of the divider chain on page 2 of thediagram.Using the outputs of both zero crossing detectors enables the phase–locked–loopto compensate for phase shifts through the output filter. However, when theinverter output voltage is low, the zero crossing detector output may not bereliable and therefore the signal at IC17 pin 6 is used.IC17 pin 13 output is a fixed 2.4576MHz frequency reference which is used by thePWM generation circuit as a timing reference.



4.2.2 Phased Locked Loop:

IC10, IC11 and IC13 form the phase locked loop. Its function is to ensure that theinverter output remains phase locked to the reserve at all times.It uses the reference and feedback signals from IC17 pin 15 and 14 respectively.Phase comparator 2 output (IC10 pin 13) goes active when the signals are not inphase as shown in Fig 4. At all other times PC2 output is tri–state. While PC2output is active, PCP output (IC10 pin 1) is low.

Typical waveforms for PLL using phasecomparator 2, loop locked at fo

FIG 4

Signals PC2 and PCP are fed into IC19. The output of IC19 at pin 19 is the inverseof PC2 but with its active period limited to a maximum of 1/20 of the cycle period(at 50Hz). The inversion compensates for the inversion in the integrator whichfollows. By limiting the maximum active pulse to such a low value, all activepulses which occur while the system is not phase locked will be the same width.This and the integrator IC13 enable a linear frequency slew rate to be obtained.The integrator uses a capacitance multiplier circuit in its feedback loop. Thisallows non electrolytic type capacitors to be used.



The output of the integrator is a d.c. level which is fed into the input of the voltagecontrolled oscillator part of IC10 via a potential divider R96, R88. As the voltagelevel varies, the output frequency of the VCO at IC10 pin 4 varies accordingly.The rate of change of d.c. voltage, which determines the VCO slew rate, is set bythe combination of R84 and equivalent capacitance of C47 and capacitancemultiplier IC13.With H1 the frequency slew rate can be changed from 0.3 to 3 Hz/Sec.The VCO input at IC10 pin 9 is buffered and appears at pin 10 (TP4). A higherlevel at this point causes a higher operating frequency for the VCO.P7 sets the operating range for the VCO for 50Hz. Setting of P7 is obtained byswitching SW1.1 OFF and adjusting P7 until the voltage at TP4 settles toapproximately 2.5V d.c. w.r.t 0V.P8 sets the operating range for the VCO for 60Hz. Setting of P8 is obtained, afterP7 setting, by switching SW1.1 OFF and adjusting P8 until the voltage at TP4settles to approximately 2.5V d.c. w.r.t 0V.This can be done with the inverter ON or OFF. Reset SW1.1 as required.

4.2.3 Waveform generation:

The 1.6MHz generated by the phase–locked–loop is fed into a series of fourinternally synchronous four stage counters IC14 and IC10. Each divide by 2output is available giving a total of 15 frequencies from 1.6384MHz to 50Hz.From this, two 8 stage counters are derived. The first one from 409.6kHz to3.2kHz is used to generate a 3.2kHz triangle wave. The other, from 6.4kHz to50Hz, generates 3 phase shifted sinewaves.IC11 and IC16 form an 8 bit multiplexer selecting which of the counters becomethe address lines A0 – A7 of the EPROM IC15.The data required to generate the triangular wave and three sinewaves are storedin the EPROM with each waveform occupying a block of 256 bytes. Address linesA8 and A9 determine which block of memory is to be accessed.IC12 is a four channel digital to analog converter. Channel 1 generates thetriangular wave with an amplitude set by the voltage difference between pin 5(REF A) and pin 6. This is a proportion of the d.c. voltage.Channel 2, 3 and 4 generate the three sinewaves. The positive peak voltage is setby the voltages at pins 4, 21 and 20 respectively (REF B, REF C, REF D).FT1 is switched ON when the inverter is switched OFF, charging C41 from –6.2Vto 0V, through D11. When FT1 is switched OFF C41 discharges slowly (t = R63 ?C41), providing a soft start at the inverter output.The input at PL4 pin 14 is a variable d.c. level from the display board. This leveland hence, the output voltage is changed by a switch selection on the displayboard.



REF B, REF C and REF D are output of the average voltage and current controlloops. There is control in d.c. for each phase.The amplitude of the three sinewaves is determined by the setting of P1, P2 andP3.Trimmer P4, for the current loop, is set at 150% of the output nominal current.IC9B monitors the overcurrent > 150% and generates a current limit alarm signalat PL4 pin 15.When the output current of any phase is > 150% nominal one of the threeregulators intervenes to decrease the reference for the respective output phase.Voltage and current feedback are derived from the UPS output current andinverter voltage, which appear, rectified, at PL4 pin 7, 8 and 9 for the invertervoltage and PL4 pin 10, 11 and 12 for the output current. Trimmer P5 is utilized forthe inverter manual operation. Outputs of the DAC are shifted and buffered, toproduce reference sinewaves at TP8, TP9 and TP10 centered on 0V for the A.C.voltage control loop (page 5). This control operates on each phase.The triangle–wave from IC12 on sheet 2, is filtered to produce a triangle–wave of8Vpp centered 0V (TP17). The control for one phase is schematically describedby the following figure, where the P.D. regulator for the phase R – shown on figure– is done by IC23B, C83, R110, R116D, R119 and C139.

Each error signal (Verr) is compared to the trianglewave by the three comparatorsIC40A, IC40B and IC38A. The three PWM signals at IC40 pins 1 and 7 and atIC38 pin 1 are fed into PWM control chips IC26, IC27 and IC28 which generatedead time of 10.4µSec. (15.2µSec. if H2 is not fitted) and generatecomplementary outputs for a single input.IC15 and IC19 provide a current protection by switching off the PWM when theIPK is active. Signal INV OFF forces the outputs into tri–state when the inverter isswitched off.The PWM at TP11 to TP16 is fed into the DRIVER board through the transistorsT4 to T9.



The desaturation signals from the BASE DRIVE boards are filtered and fed intoIC35. When one of these signals is active then the inverter will be stopped. Theoutputs of IC35 send these information to the display board.The overtemperature input at PL5 pins 1 and 2 comes from a normally closedthermostat. This signal stops the inverter and is then passed to the display board.If the inverter is stopped by a desaturation or overtemperature condition, then it islatched off by IC35. This can be reset by the INV RESET signal from the displayboard. The inverter can then be restarted with the inverter start signal.Peak current limit is derived from the transducers on the inverter currents.The IPK signal active switches OFF the PWM.The trimmer P9 provides the setting of the level of the peak current.The outputs IC47 pins 1 and 7, which are proportional to the DC component of theinverter current, are fed into comparators IC40, producing dynamic adjustment ofthe offset.


Para 4.3 = STATIC SWITCH PCB

4.3 Static Switch pcb

Refer to circuit 04.13.170 become 15C90074

Inverter Zero Crossing Detector:

The inverter output waveform is sensed using a transformer that is on theTransformers pcb. IC13A buffers the inverter zero crossing detector from thetransformer and raises the zero crossing center point to VREF1. IC16A is acomparator that gives a square wave output that is phase related to the inverteroutput. VR1 is used to adjust the phase of the ZCD to bring the inverter andreserve exactly in phase. The ZCD output is then fed to the PLL on the inverterpcb and also to the out of sync detector.

Reserve Zero Crossing Detector:

This is the same principle as the inverter ZCD using IC13B and IC168, exceptthere is no phase adjustment.

Reserve High/Low Trips:

The output from IC13B is also used for the reserve high low trips. IC17A and Bform a precision rectifier and therefore the output of IC17B is a full waverectified reserve signal. This is then smoothed to give a DC proportional to thereserve voltage. IC15A and B form a window comparator, so if the reservevoltage exceeds the limits either NRVL or NRVH go low. The reserve trips are setup for 220V operation. For 230V, SW2.1 is closed, this reduces the DC voltageinto the reserve low/high trip comparators. For 240V, SW2.2 is used. The triplevels can be adjusted using VR2.SW2.3 must be always OFF, and SW2.4 always ON.

Static Switch Failure:

A logic signal (UPS LOW), coming from Interface board, enters on PL7 pin 28.If for any reason the static switch fails and half or all the output waveform is lost,UPS LOW goes low, then IC14 pin 1 goes high and IC15 pin 13 (NSSF) goes low.



5V Power Supply:

The 5V power supply is fed from the interface pcb, there supplied by the reserveinput and by the chopper. This is also backed up from the reserve power supply sothat +5V is supplied to the control circuit even in the event of a power supplyfailure.C12 and ZD1 protect the ICs from any overvoltage.Two references are used for the static switch pcb: – VREF1 is a reference for thesense signals and VREF2 for the comparators.

Clock Generation:

IC6A in conjunction with crystal XL1 forms the main clock at 2.4576Mhz. Theclock frequency is then divided by either 5 or 6 depending on SW1.3. Thus theclock frequency (IC6 pin 17) also used for synchronizing the rest of the controllogic, is shown on the following table:–

SW1.3 UPS Frequency f on IC16 pin 17ON 50Hz 409.6 kHzOFF 60Hz 491.5 kHz

Reserve Frequency Detector:

FRDT1, FRDT2 act in conjunction with a 4020 counter to form a frequencydetection circuit that can be externally programmed for specific limits usingSW1.7 and SW1.6.

SW1.6 SW1.7 Frequency ToleranceON ON 0.75 %ON OFF 1.5 %OFF ON 2.5 %OFF OFF 6.0 %

FPA and FPB are used to derive the start and stop signals for the frequencydetector. Whenever the zero crossing detector goes high, FPA is generated, thisis immediately followed by FPB. FPB resets the external counter, that thenfree runs. The counter outputs are read when the following FPA occurs ( at thenext zero crossing).The values read on the counter outputs means the reserve frequency.If FPA occurs outside the time window, then it increments a 3 bit counter S1 toS3. After 8 consecutive times, NRFOL goes low. If the frequency returns withinlimits before the counter reaches 8, it is immediately reset.



Input Latches IC18:

This synchronizes the digital inputs to the control logic circuitry.

Out of Sync Detector:

The latched versions of the ZCD outputs, FRESL and FINVL are exclusive ORedtogether giving a pulse with an on time equal to the phase difference of the reserveand inverter (pin 12).On the leading edge of this pulse an internal counter is triggered and halted on thefalling edge. If the counter reaches a preset number (Set by SW1.5 and SW1.4),then the reserve and inverter are considered to be out of synchronization. Thissignal then ORed with the reserve voltage low and reserve voltage high to giveNOOS (active low) if any of these three are true.: SW1.4 SW1.5 PHASE TOLERANCE

OFF OFF 5 degreesOFF ON 10 degreesON OFF 15 degreesON ON 20 degrees

Static Switch Logic:

The status of the static switches is determined by pin 15 NOUT of IC5, low =inverter to load. A transfer to reserve is instantaneous unless an out ofsynchronization is detected, in which case the transfer will have a 20mSec breakto prevent large voltage differentials appearing across the static switches(transfers are limited to critical alarms only when NOOS is low). IC7generates the out of sync transfer pulse. A re–transfer to inverter is delayed by 5seconds by IC8 to prevent multiple switching of the static switches under loadfault conditions.In general all the inputs to IC5 (pins 2 to 9) must be high for the inverter to supplythe load and ”System Normal” to be on. If either of the reserve trips NRVOL orNRFOL are low, then the inverter static switch will feed the load irrespective ofthe status of the inverter trips.If the inverter is supplying the load and either NFAULT, NININVHI, NOL go low,then providing the reserve alarms are all healthy, NOUT will switch hightransferring the load to reserve. Then the alarm that forced the transfer has cleared,the load will re–transfer to inverter after a further 5 seconds. NOL is acombination of either IPEAK or OL (overload) alarms.If NOOS is low and a transfer is requested, a short pulse is generated at pin 18,NOOST, which triggers the 20mSec timer (IC7). The output of IC7 is fed intothe gate drive logic IC where it inhibits the gate drive signal.



Output Control:

IC6 pin 8 governs the status of the static switch. The static switch control can beoverridden by SW1.1 and SW1.2 as shown on the following table:– SW1.1 SW1.2 Static Switch Output

OFF OFF normal operationON OFF reserveOFF ON inverterON ON reserve

Static Switch Failure Logic:

If a static switch failure occurs (NSSF = 0), this is used to set the latch (IC19A)high. IC19 o/p remains high until reset.Also the state of the static switch is registered by IC19B, thus IC19 pin 13 (I) = 1for inverter static switch failed or 0 for reserve static switch failed. The outputsof the two latches are fed to SSF and I or IC6 which in turn locks the static switchto reserve or inverter using LKOU and R.I.The reserve static switch failure circuit is overridden in the case of a reserve faultand the inverter static switch circuit is overridden in the event of an inverter fault(IC10, SSFAIL).If the opposite static switch power input is out of limits, a transfer is not initiatedunder SSF conditions, but IC10 pin 13 is set low so that static switch failureindication is latched.If there was a transfer to reserve from inverter and it was under thesecircumstances that the reserve static switch failure was detected, then the timerIC8 is overridden by RSSF to IC8 pin 8 going low. This causes an immediatetransfer back to inverter.



Output Buffers:

The digital output control lines are buffered by IC11 and IC12.These have open collector outputs.RTL and ITL are used to drive opto couplers on the interface pcb for the staticswitch thyristor gate drives.

STATIC SWITCH TRIP SETTINGS:

Nominal Voltage 380V 400V 415VReserve voltage Low 342V 358V 374VReserve voltage low (reset) 365V 380V 396VReserve voltage high 419V 438V 457VReserve voltage high (reset) 405V 422V 439V


Para 4.4 = DISPLAY CONTROL BOARD

4.4 Display Control board

Refer to circuit diagram 04.14.670 become 15C90072

General:

The display control circuit is based around the Philips PCB80C552 single–chip8–bit microcontroller. This is based on the 80C51 CPU with 256 bytes ofRAM, timers, Analog–to–Digital converter, PWM outputs, digital I/O portsand a full duplex UART on board. For detailed information on this componentrefer to the relevant data sheets.Although there are many 80C51 based microcontrollers with similar features tothe 80C552 there is currently no direct second source for this component.To increase the capability of the 80C552 and to perform all of the functionsrequired for the display control board, additional RAM, EPROM, EEPROMand digital input and output lines have been added.

Addressing and Data Bus:

The 80C552 can access up to 64K of program memory and additional 64K ofdata memory. When accessing external memory Port 0 and Port 2 of the 80C552form the address and data buses. The lower order 8 bits of the address are outputthrough Port 0 and latched by IC4 when ALE (Address Latch Enable, IC2 pin48) goes high. The 8 bit data is then written or read through Port 0. Port 2provides the higher order 8 bits of the address.When reading program memory (EPROM), data is read when PSEN (ProgramStore Enable, IC2 pin 47) goes low. Reading and writing to data memory iscontrolled by RD (Read IC2 Pin 7) and WR (Write IC2 Pin 6)

Data Memory:

The 64K data area is made up of RAM and digital input and output lines. 32K isallocated to the RAM, although only 8K is used (IC12 pin 26 tied to +5V byLK3D).IC5 and IC6 are the output data latches. When the address is 8006h or 8007h IC19pulls the /CSOUT 0 or /CSOUT 1 low, respectively. When this line returnshigh the data appearing on the data bus is latched through to the output.IC8 and IC9 provide open collector outputs for these signals.IC10 is a series of darlington drivers used to drive the LEDs on the mimic board.Four outputs from IC6 and 2 outputs taken directly from IC2 are the signals forthe LED drives.



The enable pin (pin 1) of IC5 and IC6 is driven from Pin 18 of the 80C552. Atpower up and under reset conditions, this pin is held high. IC5 and IC6 outputs arethen forced to tristate and the internal pull up resistor at the inputs to IC8 andIC9 can pull these lines high. The outputs of IC8 and IC9 are then off untilthe microcontroller generates the required enable signal.This prevents spurious output pulses at power up.The drive signal for the buzzer comes from the PWM 0 output (pin 4) of the80C552. This is set to high or low to switch the buzzer on or off. (HIGH = ON)

Frequency Inputs:

The inverter and reserve zero crossing detector outputs are fed into pins 16 and17 of the microcontroller via buffer IC3. Pins 16 and 17 are coupled to timer T2of the 80C552 which is configured as a 16 bit counter, free running at 1MHZ.At each positive going edge of the signals at Pin 16 and 17, the contents of timerT2 is saved to a register.By reading this register following two consecutive edges, the period of thesquarewave can be determined and hence its frequency can be calculated.

Analogue Inputs:

Port 5 of IC2 is used for the analogue inputs for the analogue to digital converteron board the 80C552. This is a 10 bit converter with eight multiplexed inputs.The inverter voltage and load current waveforms appear on pins 1 and 68 ofIC2. These waveforms are sampled once every 250 micro–seconds during thesampling cycle and from this data R.M.S calculations are performed. For thisreason only small noise filters can be used on these lines. The other four analogueinputs are DC levels which are read once every l00mSec. Each of these inputshas a filter comprising of a l00KΩ resistor and a 1µF capacitor.The analogue reference for the analogue to digital converter is derived from a 2.5volt zener diode. This voltage represents the full scale voltage for all of theanalogue inputs. The accuracy of this voltage is not critical as any error iscompensated for in software by the self calibration routine.

Analogue Output:

Pin 5 of IC2 is a PWM output controlled by the 80C552.This is configured to operate at a frequency of 23.5kHz with a duty cycle variablefrom 0 to 100%. The squarewave output from pin 5 is filtered by R6 and G13 togive a d.c. level proportional to the duty cycle of the PWM at the base of TR2.TR2 acts as a buffer for this analogue voltage. The greater the duty cycle at pin 5,the higher the d.c level at PL8 pin 43. This d.c level is used to vary the inverteroutput voltage, by varying the reference level on the inverter drive board.



EEPROM:

IC1 is a 93C46 128 byte by 8 bit EEPROM. This device can also be configuredas 64 x 16 by pulling pin 6 high.The clock, data in and data out pins of the EEPROM are connected to Port 4 ofthe microcontroller. The clock pin (pin 2 of IC1) is used to clock serial data intoor out of the EEPROM and is only used when data is being written to or read fromthe device. Chip select for the EEPROM is derived from the GAL, IC7. Thisline (CSEE) is set active by writing a 1 to address 8008h. It is cleared by writinga 0 to this address.

Crystal Oscillator:

The oscillator for the microprocessor is built into the 80C552 device andrequires only the crystal QZ1 and capacitor C10 and C11 to produce thenecessary clock.The oscillator which is used for the RS232 baud rate is based around the GAL,IC7. This uses a 4.9152 MHz crystal frequency which is then divided by 16 toprovide a frequency reference of 307.2 kHz. This is then fed into the timer1 inputof the microprocessor. The 80C552 then performs the necessary division toprovide a baud rate of 1200, 4800, 9600 or 19200 baud depending on the settingof the relevant DIL switches.

RS232C Interface:

The RS232C port uses the UART (Universal Asynchronous ReceiverTransmitter) which is part of the 80C552. The data lines are TXD (IC2 pin 25)for data transmitted from the microcontroller and RXD (IC2 pin 24) for datareceived.Where necessary, data flow through external devices such as the RS232C toRS2422A converter can be controlled using the line DTR (from IC2 pin 23).These three lines are buffered by IC3 and leave the display control board in TTLformat. Conversion into RS232C levels is performed on the interface board.

LCD Interface:

The LCD module is driven through the parallel ports on the 80C552. Port 4 isused for the data transfer and three lines from Port 1.


Para 4.5 INTERFACE PCB

4.5 Interface board

Refer to circuit diagram 15C70516

This PCB performs the following functions:–

i) Supply section: provides a distribution of supply voltage for the boards.

ii) Acts as a distribution point for routing control signals.

iii) provides a start–point ground for all other PCBs.This start–point is connected to chassis through the inductance L1.

iv) Provides Open–collector drives for the rectifier and static switchphoto–triac.

v) Provides isolation for RS232, AS400 and R.A.U. interfaces using relays.

vi) Provides control logic and drive circuit for D.C..

vii) Provides the display pcb with two positive signals (charge/dischargecurrent) derived from the hall–effect current transducer.

viii)Provides precision rectification of A.C. signals to feed the display pcb.

ix) Provides Output Voltage, Reserve Voltage and Mains Voltage detectors.

x) Provides rectifier current limit.

4.5.1 Precision Rectifier:

– Inverter and Reserve CurrentAs the micro–processor analog inputs can only accept positive signals withinthe range 0V to 2.5V, the inverter and reserve sample circuits are followed byprecision rectifiers. The reserve and the inverter full–wave precision rectifiershave a gain of 0.66.

– Load CurrentA 1000 : 1 load current transformer is connected to burden resistors R170,R171 and R172. These resistors will change depending on the unit with J1 andJ2. An A.C. voltage proportional to 1/1000 of the load current is producedacross the burden resistors. This signal is full–wave precision rectified, with again of 1, by IC26, IC28 and IC31.



4.5.2 DC Rail Voltage Monitor:

This circuit provides a low voltage signal proportional to the DC rail voltage.To enable op–amp IC25 and IC27 to run with a single supply rail, the”center–point” of the input attenuator is biased at 2V. The two inputs from R174and R176 are buffered by two high impedance op–amps IC25B and IC27A, andfed to the differential amplifier IC27B.The output through the trimmer P8 is fed to the microprocessor, while the signalon the common–point of resistors R268 and R269 is fed in the rectifier andinverter control.

4.5.3 Battery Current Conditioning:

A 1000 : 1 hall effect current transducer is used to provide an isolated signalproportional to the battery current. The current transducer burden resistor R194 orthe parallel R294, R210 and R212 according if the current transducer has currentor voltage output.The voltage across the burden resistor is positive for charge currents and negativefor discharge currents. The charge current circuit, with output at TP14, has IC33Aconfigured as a non–inverting amplifier with a gain of 2. The diode, in its output,blocks negative voltage during battery discharge.The discharge current circuit, with output at TP15, has IC33B configured as aninverting amplifier with a gain of 0.332. The diode, in the output, blocks negativevoltage during battery charge.The hall effect transducer is supplied with +/–17V D.C. from the S.M.P.S. board.



4.5.4 DC Battery Contactor Drive Circuit:

A low level on pin 9 or pin 10 of IC40 will initiate the contactor to open.A low level on pin 9 means By–pass switch and Output switch simultaneouslyclosed.The signal on pin 10 is low only when:–

PSFA = 1and /INVSTAT = 1and /BATTEST = 0

The circuit comprising of components IC34, R233, C88, R221 and R222 providesa 1 second time delay. This ensures that the inverter has stopped before the batterycontactor is opened.Initially, at power up, the level at IC34 pin 1 is LOW until the VDC rail is rangedup over 288V (i.e. for 144 cells).This is done to synchronize the start of the timer, IC39, with the powering up of thecontactor output drive stage.The HIGH level on the input of IC36 pin 5 is inverted and splits into two paths:–

1) In one direction it starts the timer IC39; its pin 8 goes LOW for 10 seconds andthen stays HIGH. This signal inverted by IC36 turn on IC30, providing fulldrive current for 10 seconds to the contactor, which is connected betweenPL11.7 and PL11.6.

2) Having pulled the contactor IC30A, a reduced level of current, limited byR199, can flow through IC30A when IC30B stops conducting.This allows saving current (energy) once the contactor has been supplied.

The contactor will open under the following conditions:–

i) At the end of battery discharge. i.e. Low battery condition,

ii) When the bypass and output breakers are simultaneously ON,

iii) When the emergency Power OFF is initiated,

iv) When the main switch is opened, and the inverter is OFF.



4.5.5 RS232 Interface:

The RXDATA, DSR, CTS and DCD inputs to the UPS feed onto the IC19 andIC22, RS232 line driver IC.These signals, through the IC19, IC22 and the opto–couplers go to the display pcb.The TXDATA, DTR and RTS lines from the display pcb drive the opto–couplers.The signals pass through the opto–couplers onto the RS232 line drive IC, whichtranslate the TTL levels to the EIA–standard–RS232.The supply for IC19 and IC22 (+5VRS) is isolated and derived from the mainS.M.P.S. through the voltage regulator IC1.The use of opto–couplers and an isolated RS232 supply enable the RS232interface to be fully isolated avoiding sections damage to the UPS in the event ofincorrect connections to the RS232 port.

4.5.6 AS400 Interface:

The AS400 socket on the rear of the UPS is connected to the interface pcb viaPL21 flat cable. All AS400 outputs are derived by switching relays.The ’UPS ON and Supplying Load” output is provided by RL5 driven by arectifier circuit, and fed from the load output sample transformer.The ”Reserve to Load” output is provided by RL4 which is driven by IC30. Thissignal feeding the IC30 comes straight from the display pcb.The ”Primary supply fail” and ”Shutdown Imminent” are driven by RL3 and RL2respectively.When the bypass breaker is operated then these outputs are inhibited.

4.5.7 Remote Alarm Unit Interface (R.A.U.):

An unregulated A.C. power supply from the RAU is derived from an outputvoltage transformer. The RAU output signals for ”Load on Reserve”, ”Mainsfailure”, ”Shutdown Imminent”, ”Inverter fault” and ”Summary Alarm” arederived by switching relays. The input signals to the relays drivers are derivedfrom micro–processor outputs on the display pcb.



4.5.8 Inverter, Reserve and Rectifier Thyristor Drives:

The following figure shows the circuit which drives photo–triacs (on the firingboard) for SCR static switch.

A B

C

D

When ITL is active (load on inverter) the output of IC14 is LOW, the currentthrough the resistors A and C switches on the photo–triac, and is limited to 10 mA.The resistor B and D limits the voltage in the diode of photo–triac.The same currents are for the drivers for rectifier’s SCRs.

4.5.9 V OUT Detector:

The circuit (IC11) senses the VOUT and generates an alarm signal /UPS when theoutput voltage is lower or higher than 17% of the nominal.The switch SW1 allows the selection of the nominal voltage as follows:–

VOUT SW1.1 SW1.2380V OFF OFF400V ON OFF415V ON ON

Such signal is sent to the reserve static switch board and generates an alarm of”static switch failure”.



4.5.10 V RES Detector:

This circuit senses the average value of the 3 voltage of the reserve which aresummed by IC35.The output of the sum is a voltage about 2.05VDC (at 380V). In addition, whenEPO or wrong phase rotation failure sensors are active, such increases, and signalallows to open the reserve static switch and therefore disconnecting the load. Suchsignal that goes into the reserve static switch board provides an alarm forLOW/HIGH reserve voltage.

4.5.11 V MAINS Detector:

As the V OUT detector, this sensor is based on the LOW/HIGH window andprovides an alarm to the microprocessor and the rectifier (turning OFF it) whenthe input voltage to the rectifier is not within the range of +/–20%.

4.5.12 Backfeed Protection:

OP1 is an opto–coupler which receives a signal from the backfeed protectionboard and generates an alarm for the micro–processor (pin 9 of PL23).

4.5.13 Hydrogen Detector:

The output of the opto–coupler is logic signal that goes to the rectifier control andreduces the voltage reference for the DC (e.g. from 327V DC nominal to about288V) and generates an alarm on the display ”Battery Charge Inhibited” when theinput signal is active, for instance when there is hydrogen in the battery cabinet.

4.5.14 Emergency Power OFF (EPO):

When the EPO is active, the opto–couplers OP12, OP13 and OP15 switch ON,then:–

– the rectifier shutdown,– the inverter is inhibited,– static switch is open,– battery contactor is open.

In this situation, the load is not supplied.

4.5.15 Rectifier Current:

The rectifier current is buffered by IC37, and fed into the display board for themeasurement and the rectifier control loop in the rectifier board.


Para 4.6 = BASE DRIVE PCB

4.6 Base Driver board

(Ref. 15C70533)

There are two distinct power driver stages on the driver board, one is used to drivethe high switch of the power H–bridge (DC/ac converter), the other one to drivethe low switch of the power H–bridge. These two stage are identical but areelectrical insulated.The driver is supplied by the SMPS board (15C70514), receives the PWM signalfrom the inverter control board (15C70512), transmits desaturation signal to theinverter control board and drives the power switch of H–bridge through connector2K. (Connector 2K is common to the two driver stages)Referring to the first section, the input pwm signal is opto–isolated byopto–coupler OP1, a on delay time of about 1.5µs is added by a RCD network(R17,C15,D8) operating with a Schmitt inverter. This signal drives a currentgenerator that sources current to the base of power transistor (power module), thecurrent is selectable from 1 to 6A by J1 & J9, the source current is supplied by T7 aT0220 NPN darlington power transistor. The sink current, when the powermodule is driven off,is limited by the value of R3 plus R4, this current is sunk byT5 a T0220 PNP darlington power transistor.Desaturation is sensed by a fast precision comparator (U3) and sent to the invertercontrol board by a fast opto–coupler OP2. This signal has a memory to achieve amore reliable protection action. During switching, the desaturation signal ismasked to avoid false alarms.


Para 4.7 = SMPS BOARD

4.7 SMPS BOARD

(Ref. 15C70514 )

DC input voltage: 230V to 550VAC input voltage: not allowedOutput power: 110W maximumThe SMPS supplies the following outputs:

+8V 2.5A (isolated) control+8V 0.3A (isolated) interface+/– 17V 0.5A (isolated) control+7V/–11V 3Apk (isolated) H–bridge driver+7V/–11V 3Apk (isolated) H–bridge driver+7V/–11V 3Apk (isolated) H–bridge driver+7V/–11V 3Apk (isolated) H–bridge driver+7V/–11V 3Apk (isolated) H–bridge driver+7V/–11V 3Apk (isolated) H–bridge driver

There are two distinct power stage converters:–– a Buck to supply a regulated unisolated voltage of 150V,– a Push–Pull powered by 150V to obtain the above mentioned insulated output

supplies.

The “Buck” stage:

The Buck converter is controlled by a Siemens TDA4919 (IC1), a PWM singleended controller operating in voltage mode, an internal under–voltagecomparator with hysterisis is used to inhibit the output driver of IC1 when the DCrail falls down 165V.The operating frequency (about 50kHz) is set up by the value of C5 and R3 whilethe pwm ramp slope is determined by the value of C4, which has to be at least fivetimes the value of C5, and by R39 and R40 that perform a feed forward controlaction. Resistor R24 senses the Buck current, and ratio of R5 and R8 sets thethreshold level of the current limiter. A multiple RC network (R23,C15,R12,C11)is used to clean up the current signal. Soft start action is present to limit the currentwhen the output capacitors are charged, the duration of the soft start can beprogrammed by the size of the capacitor C6. A voltage reference of 2.5V isavailable at pin 11, it provides a highly constant temperature characteristic and itis used as reference signal for under–voltage comparator, current limitercomparator and as set–point in the control output voltage.The power switch (S5) is a T03P N channel power mosfet rated at 1000V Vds and8A Id @ 25·C, the free wheeling diode (D6) is a 1000V 12A very fast recoveryepitaxial diode.


Para 4.7 = SMPS BOARD

A voltage dependent resistor (VR1) protects the circuit against the risk of voltagespikes present on DC rail. An input RFI filter (C22,C23,C24) attenuates highfrequency attenuations, C22 and C24 are metallized paper capacitors.At start up, IC1 is powered by a linear power supply (S4 T1 Z3) which is lockedout when feedback from an auxiliary output of the Push Pull transformer(TR4) ispresent, when this action is performed a green led (DL1) lights up.The input rectifier voltage feedback is obtained from a voltage divider(R27,R28,R29,R30,R31), this signal is available at connector 2M.Toroidal inductor LS1 and polypropylene capacitor C27 form the output filter,theoutput voltage is sensed by a differential amplifier IC3, the feedback controlnetwork uses the internal opamp of TDA4919, variable resistor P1 sets the outputvoltage to 150V.

The “Push–Pull” stage:

The Push Pull converter is controlled by a Siemens TDA4918 (IC2), a PWMcontroller operating in voltage mode, an internal overvoltage comparator withhysterisis, is used to inhibit the output drivers of IC2 if the output of buck goesover 190V, due to a buck failure.The operating frequency (about 50kHz) is set up by the value of C35 and R51,while the pwm ramp slope is determined by the value of C34, which has to be atleast five times the value of C35. No feed forward actions is performed in thisstage and the duty cycle is fixed at 50%, the dead–time is generated inside theTDA4918 and can be externally modified.The resistor R72 senses the Push Pull current and the ratio of R56 and R59 sets upthe threshold level of the current limiter, a multiple RC network(R58,C43,R71,C41) is used to clean up the current signal.A soft start action is present to limit the current when the output capacitors arecharged, the duration of the soft start can be programmed by the size of thecapacitor C36. A voltage reference of 2.5V is available at pin 11, it exhibits ahighly constant temperature characteristic and it is used as reference signal forovervoltage comparator and current limiter. At startup IC2, is powered by a linearpower supply (S3,T2,Z8) which is locked out when feedback from an auxiliaryoutput of the Push Pull transformer (TR4).Four transformers (TR1,TR2,TR3,TR4) are paralleled together in Push Pull stageto deliver the supplies needed to power the circuits, each secondary has a rectifierwith two capacitors. An electrolytic capacitor to smooth and a ceramic to removehigh frequency noise.The outputs of the PWM controller ICs are active high and can deliver all thecurrent needed to drive power mosfet transistors, the voltage supply of this stage isseparated from the logic so noise in control circuits is avoid.


Para 5a = SOFTWARE DESCRIPTION ( FSB < 30 )

5a SOFTWARE FUNCTIONAL DESCRIPTION(for UPS having FSB status < 30)

5a.1 General

The software for the microcontroller on the display control board reads all of thedigital inputs, analog inputs and both frequency inputs. It generates alarms whichcause messages to be displayed and outputs from the display control board to bedriven. This document describes the conditions which need to be met in order togenerate each of the messages and outputs.All digital inputs are read once every 100mSec. Analog and frequencymeasurements are also read every 100mSec. All digital inputs are not filtered insoftware as filtering is performed in hardware by capacitors mounted on the PCB.Analog measurements, including frequencies, are filtered. This filter takes theaverage of a given number of samples and is updated every time a new sample istaken.

5a.2 Accessing Information

All of the information can be accessed through the LCD Display by using the 3arrow keys on the front panel of the UPS. The information is arranged in columns.

The and keys allow movement up and down the selected column and the

key moves from one column to the top row of the next column.



5a.2.1 The first column contains information relevant to the UPS as a whole.The first page will normally show the UPS rating on the first line with one of thefollowing messages on the second:

SYSTEM NORMAL

TESTING BATTERY

SYSTEM IN ALARM

If the battery is discharging or the inverter is in overload operation then anadditional page of information is inserted at the top of the first column. This willbe in the form:

BATTERY DISCHARGING

AUT **min DIS **min

or

OVERLOAD

INV STOP **m:**s

If both conditions are true then both pages of information will be accessible. Thetop of the column will be the one showing the shortest time before invertershutdown.If none of the arrow keys is pressed, then after 5 minutes the display will return tothe top page of the first column of information. This top page will automaticallychange according to the UPS operating condition as described above.Following the UPS status, each of the measurements available in the UPS can bedisplayed. These are:

D.C. Voltage and Rectifier CurrentD.C. Voltage and Battery CurrentInverter Voltage and FrequencyReserve Voltage and FrequencyLoad CurrentsLoad Peak Factor and Percentage LoadingTotal time on InverterTotal time on ReserveNumber of mains failures and Total Duration

Pressing the key moves down through this list. The key can be usedto move back up. At the end of the measurements, the software revision andrelease date is displayed. Note that the revision and release date of thesoftware is also displayed for 2 seconds when the machine is switched ON orif the retrofit option has been selected.



5a.2.2 The second column contains information relevant to the Rectifier and Battery.The first line of the display will show:

RECT/BATT ALARMS

While the second line will show the first active message from the following:

NO ALARM ACTIVEPRIMARY SUPPLY FAIL

PHASE FREQUENCY ERRORBATTERY FAULT

BATT CONTACTOR OPENBATTERY DISCHARGINGSHUTDOWN IMMINENT

DC VOLTAGE HIGHDC VOLTAGE LOW

HARMONIC FILTER OPENBATT. CHARGE INHIBIT

MAINS INPUT SWITCH OPEN

If more than one of these alarms is ON, pressing the key will move through thelist of active messages.

After the last active alarm, pressing the key will move through the followingpages of measurements:

D.C. Voltage and Rectifier CurrentD.C. Voltage and Battery Current



5a.2.3 The third column contains information relevant to the Inverter.The first line of the display will show:

INVERTER ALARMS


NO ALARM ACTIVE INVERTER FAULT

OUT OF SYNC OVER TEMPERATURE

BYPASS SWITCH CLOSED SHUTDOWN IMMINENT

DC VOLTAGE HIGH DC VOLTAGE LOW

INVERTER NOT RUNNING INVERTER INHIBITEDINVERTER BLOCKED INVERTER VOLTS HIGHINVERTER VOLTS LOW

OVERLOADSTOP DUE TO OVERLOAD

STATIC SWITCH FAULTCURRENT LIMIT

SYSTEM TEST MODE


After the last active alarm, pressing the key will display Inverter Voltage andFrequency.



5a.2.4 The fourth column contains information relevant to the Load and Reserve.The first line of the display will show:

LOAD/RES ALARMS


NO ALARM ACTIVELOAD ON RESERVE

LOAD NOT SUPPLIEDINVERTER FAULT

BYPASS SWITCH CLOSEDRESERVE SUPPLY FAULTRESERVE FREQ FAULTRESERVE VOLTS HIGHRESERVE VOLTS LOWSTATIC SWITCH FAULT

OVERLOADPHASE SEQUENCE FAULTBACKFEED PROT ACTIVE

OUTPUT SWITCH OPENRESERVE SWITCH OPEN



Load CurrentLoad Peak Factor and Percentage LoadingReserve Voltage and Frequency



5a.2.5 The fifth column is normally used to select the language for LCD messages.

Using the and keys changes the language and pressing the key returnsto the first column with the messages displayed in the selected language.Once a language has been selected, this will remain in use until it is changed usingthe language selection column. If the UPS is switched OFF and then ON again itwill power up in the selected language.

If POWER HISTORY information is available the pressing the key from thefourth column will cause the LCD to display:

POWER HISTORY

DOWN TO ACCESS

Pressing the key will now enter into the Power History information.When the Power History is exited, the display will return to this entry message.

Pressing the key from here will move on to the language selection column,

and pressing again will return to the first column.If no key is pressed for 5 minutes, the display changes back to the top row of thefirst column of information.



5a.3 Measurements

5a.3.1 D.C. voltage

One sample is taken every 100mSec and the displayed reading is filtered over 10consecutive samples. This reading is scaled so that an input signal of 2.215V willgive a display reading of 326V.

5a.3.2 Rectifier Current

One sample is taken every 100mSec and the displayed reading is filtered over 10consecutive samples. A current of 36.4A will give a sense voltage of 1V.

5a.3.3 Battery Current

One sample is taken every 100mSec and the displayed reading is filtered over 10consecutive samples.Positive and negative battery currents are read as two separate readings.If:– the battery is discharging, or– the rectifier has been shutdown due to DC overvoltage, or– the battery is being tested,then the negative current is displayed, otherwise the positive reading is used.A positive current of 12 Amps gives a sense voltage of 1V. A negative current of40 Amps gives a sense voltage of 1V.

5a.3.4 Inverter Voltage and Frequency

The inverter voltage is full wave rectified and smoothed in hardware. This DClevel is then read once every 100mSec. and the display reading is filtered over 10consecutive samples.The sampling is synchronized to the inverter frequency to overcome aliasingeffects caused by the ripple on the DC level.A DC level of 1.09V will give a displayed voltage of 240V.The inverter frequency is determined from the period of one complete cycleevery 100mSec. The displayed reading is filtered over 10 consecutive samples.The period is the time between two consecutive positive going edges at pin 16of the microcontroller.



5a.3.5 Reserve Voltage and Frequency

The reserve voltage is full wave rectified and smoothed in hardware. This DClevel is then read once every 100mSec and the display reading is filtered over 10consecutive samples.The sampling is synchronized to the reserve frequency to over come aliasingeffects caused by ripple on the DC level, thus if the reserve frequency signal is notpresent, the displayed voltage will be zero. A DC level of 1.09V will give adisplayed voltage of 240v.The reserve frequency is determined from the period of one complete cycleevery 100mSec. This is taken from the output of the reserve zero crossingdetector as the time between two consecutive positive going edges at pin 17 ofthe microcontroller. The displayed reading is filtered over 10 consecutivesamples.

5a.3.6 Load Current

The load current waveform is sampled every 250 microseconds for onecomplete cycle. From these samples an RMS calculation is performed.This sampling is performed on one cycle every 100mSec and the displayed valueis filtered over 16 consecutive RMS readings.The start and end points for the samplings are taken from the inverter zerocrossing detector, which is the signal used to determine the frequency.If this frequency signal is not present, then the displayed current will be zero.A precision rectified 0.848V RMS signal at the sense input will give adisplayed current of 40A.

5a.3.7 Load Peak Factor and Percentage

The peak factor of the load current is obtained by dividing the filtered value of thepeak load current by the filtered value of the RMS load current. The filteredvalue of peak load current is taken over 10 consecutive samples.The percentage RMS load current is calculated from the filtered RMS loadcurrent divided by the max RMS load current in Appendix A. The percentagepeak load current is also calculated from the filtered peak load current dividedby the max peak current in Appendix A. The displayed value is the highest ofthese two values.



5a.4 ALARM MESSAGES AND DIGITAL OUTPUTS.

Alarm messages and digital outputs are set on the basis of conditions set at thedigital inputs and also by conditions set by the level of the displayed analogreadings.For trip settings of analog measurements, refer to Section 5a.13.

5a.4.1 Testing Battery and Battery Test Output

A battery test is automatically initiated every seven days minus 5 hours after theunit is switched on. To initiate the test the microcontroller sets the BATTERYTEST output low and the message ?TESTING BATTERY” replaces the?SYSTEM NORMAL” message on the display. This automatic test is inhibitedfor two days following a primary supply to prevent the testing of a dischargedbattery. A battery test is also initiated following a DC voltage high condition toprevent overcharging of the batteries. This will also be inhibited for two daysfollowing a primary supply fail.

A battery test can be manually initiated by pressing both and keys on thedisplay simultaneously. This manual test is not inhibited following a mainsfailure. The next automatic test will occur one week after a manually requestedtest.The test lasts one minute during which time the battery voltage is continuouslymonitored. If the voltage falls below the Minimum Battery Test Voltage given inSec. 5a.13 then the test is terminated and the alarm BATTERY FAULT isgenerated, otherwise the test is terminated after one minute and no alarm isgenerated. If the BATTERY FAULT alarm was active prior to the test, then thealarm is cancelled while the test is being made and may be set again depending onthe test result.At the end of the test, the BATTERY TEST output is reset high and after 10seconds the TESTING BATTERY message is cleared. This allows 10 secondsfor the rectifier to phase up following the removal of the battery test signal.



A second type of battery test can also be performed. This can only be manually

initiated by pressing the and keys simultaneously for two seconds. Thistest shuts the rectifier down using the rectifier shutdown output so that thebattery is discharged.At the end of discharge, the inverter stops, the rectifier is restored and as therectifier phases up, the inverter restarts automatically, thus returning to systemnormal.The test is inhibited if the reserve is outside limits.During the test, the message ’TESTING BATTERY’ replaces the ?SYSTEMNORMAL” message on the display and the battery autonomy can be read. Atthe end of the test, 15 seconds are allowed for the rectifier to restart before theTESTING BATTERY message is removed.

The test can be manually terminated by pressing the and keyssimultaneously and holding for 2 seconds.

5a.4.2 Rectifier Shutdown Output

If the DC voltage rises above the HIGH DC trip level given in Section 5a.13 andremains high for more than 2 seconds, the microprocessor generates a signal toshutdown the rectifier.When the DC level has fallen the rectifier is allowed to restart.

5a.4.3 Battery Discharging

This alarm is generated when the DC voltage falls below the VDC BATTERYDISCHARGING level given in Section 5a.13.The alarm is cleared either when the voltage rises above this level or when thepositive current into the battery is above 0.8 Amps.



5a.4.4 Shutdown Imminent

This alarm is generated when the DC voltage falls below the VDC SHUTDOWNIMMINENT level given in Section 5a.13.The alarm is cleared when the BATTERY DISCHARGING alarm is cleared orwhen the DC VOLTAGE LOW alarm comes ON.The SHUTDOWN IMMINENT level increases for long discharges:–

– for the first 60 minutes –> it is fixed at 1.75 Vpc,

– from 60 minutes to 4 hours –> it increases linearly from 1.75Vpc to 1.85Vpc,

– from 4 hours to 10 hours –> it rises from 1.85Vpc to 1.9Vpc,

– from 10 hours onwards–> it is fixed at 1.9Vpc.

5a.4.5 DC Voltage High

This alarm is generated when the DC voltage rises above the HIGH DC TRIPlevel given in Section 5a.13.It is cleared when the DC voltage falls below the HIGH DC TRIP RESET level.

5a.4.6 DC Voltage Low

This alarm is generated when the DC voltage falls below the LOW DC TRIP levelgiven in Section 5a.13.It is cleared when the DC voltage rises above the LOW DC TRIP RESET level. Itwill also be cleared if the positive battery current into the battery is above 0.8Amps.The LOW DC TRIP level increased for long discharges:




– from 10 hours onwards–>it is fixed at 1.8Vpc.



5a.4.7 Out of Sync

This alarm is not generated in software. but is read from the system through oneof the digital inputs.It can however be inhibited in software by any of the following conditions:

– Inverter Off

– Reserve Overloaded Causing Inverter to Current Limit

– Reserve Fault

5a.4.8 Inverter Volts High & Inverter Volts High Output

This alarm is set when the inverter voltage rises above the INVERTERVOLTAGE HIGH level given in Section 5a.13 and is then latched and causes theinverter to stop.The alarm is cleared when the inverter is restarted. The output is held HIGH whilethe alarm is active.

5a.4.9 Inverter Volts Low & Inverter Volts Low Output

This alarm and output (active high) are both set when the inverter voltage fallsbelow the INVERTER VOLTAGE LOW level given in Section 5a.13.They are both cleared with the inverter voltage rises above this level by thespecified Hysterisis for the inverter trips.The alarm is also inhibited when:– the inverter is off, or– the reserve is overloaded forcing the inverter to fold back under current limit.

The output signal is not inhibited by these conditions.

5a.4.10 Overload and Overload Output

This alarm is set when the RMS load current rises above the OVERLOAD TRIPCURRENT given in Section 5a.13.It is cleared when the RMS load current falls below the OVERLOAD TRIPRESET CURRENT.If load is on inverter then this alarm appears in the page INVERTER ALARMSas well as in the LOAD/RES ALARMS page. This OVERLOAD OUTPUT is setHIGH whenever the alarm is active.The OVERLOAD OUTPUT is only set HIGH if load is on reserve, or if theinverter is stopped due to overload.



5a.4.11 Stop Due to Overload

The overload operation is allowed for a duration dependent on the overloadpercentage:–– An overload of 125% is allowed for 10 min.,– An overload of 150% is allowed for 10 sec.,

Above these values, the inverter is stopped, and automatically restarts after 10min.If the overload duration doesn’t reach the above values, the inverter isn’t stopped,but its nominal overload duration decreases depending on the operation statusbefore and after the overload. I.e.: after an overload of 150% during 9min and59sec, the UPS reaches again its nominal overload duration after 1 hour if it worksat 100% load, but after 10 min if it works without load.The overload capacity is based on two curves which represent the time T(inseconds) before overheating of the magnetics or heatsink occurs at a given per unitloading, K1.Whilst in overload, a proportion of the thermal capacity is used up as follows:

A1 = T1 x (K12 – 1) for the magnetics

A2 = T2 x (K1 – 1.25)2 for the heatsinkwhere A1 max = 337.5 and A2 max = 0.625

Below 100% loading, another curve which relates the load percentage to the time,calculates the time required to obtain again the nominal overload capacity.

5a.4.12 Current Limit

This alarm is generated when either the mean current limit input or the peakcurrent limit input go active (HIGH).The mean current limit input is masked if it is caused by an overload while theload is on reserve.

5a.4.13 Load not Supplied

This alarm is generated if neither load on reserve or load on inverter inputs areactive (HIGH) and the bypass switch is not closed.It will also be generated if the load is on inverter but the inverter is off.

5a.4.14 Inverter Not Running

This alarm is generated if the inverter has been stopped by pressing the inverteroff key, or if the inverter has not yet been started.It is not generated if the inverter is stopped due to a fault condition.The inverter can be started by pressing the inverter start key.



5a.4.15 Inverter Inhibited

The inverter may be inhibited by:–– an EPO request (See below),– if the D.C. voltage is high for more than 2 seconds,– if the D.C. voltage is low,– if the bypass switch is closed and the output switch is NOT open,– if the overload max. duration has been reached,The inverter will not be inhibited for D.C. voltage low if the system test modeswitch (SW1.8) is ON.When all of these conditions are clear, the inverter will automatically restart.

5a.4.16 Inverter Blocked

The inverter will be blocked by:–– the inverter fail input going active (HIGH),– overtemperature,– inverter voltage high,– inverter static switch faultIt will not be blocked for inverter voltage high or overload time?out if in systemtest mode (SW1.8 ON).The alarm can be cleared and the inverter restarted by pressing the inverter startkey provided that the fault condition does not still exist.

5a.4.17 System Test Mode

This message indicates that DIL switch SW1.8 is ON which puts the system into a’TEST MODE’.In this mode the software functionally changes as follows:– Inverter can be stopped quickly by pressing the inverter off key. It is not

necessary to hold it pressed for 2 seconds,– Inverter wilt not be stopped for an overload time–out.– Inverter will not be stopped for inverter overvoltage.– Inverter will not be inhibited for d.c voltage low.

5a.4.18 EPO Request

An EPO request is generated by pulling the inverter reset line low.The software checks that this is not caused by the bypass breaker being closedand then stops the inverter and opens the battery contactor.The EPO function is latched in software.If the inverter reset line is released, the battery contactor will close and the inverterwill restart.



5a.4.19 Bypass Switch Closed

This alarm is generated when the bypass switch closed input is pulled high.The external hardware stops the inverter and opens the battery contactor.To prevent battery charge current from causing arcing across the contactorterminals, the Software forces the rectifier to phase back by initiating a dummybattery test.Once the contactor is open, the battery test is cancelled.

5a.4.20 Backfeed protection

This alarm is generated if the backfeed protection input is pulled low.It is latched if the load on reserve input is active (high), and hence can only becleared if the backfeed protection input goes high (inactive) whilst load is not onreserve.

5a.4.21 Static switch fault

This alarm, when displayed in the LOAD/RES ALARMS section is generatedwhen the static switch fail input is active (HIGH).This alarm may also appear in the INVERTER ALARMS section.In this case it indicates that a voltage greater than 1/3rd of the nominal AC voltageis present at the inverter sense port when the inverter is not running. This shows avoltage being feed back from the reserve supply through a faulty static switch.If an attempt is made to start the inverter, it will not start and becomes blockeduntil the fault is cleared.



5a.4.22 The following list of alarms depend solely on the levels at

their respective inputs and are not conditioned in software other than the

filtering during the reading of the inputs and the delays before the sounding

of the buzzer.

ALARM INPUT ACTIVE

PRIMARY SUPPLY FAIL Primary Supply Fail Input HIGHPHASE SEQUENCE ERROR Primary Phase Fail Input LOWOVER TEMPERATURE Over–temperature Input HIGHBATTERY CONTACTOR OPEN Battery Contactor Open Input LOWLOAD ON RESERVE Load On Reserve Input HIGHINVERTER FAULT Inverter Fail Input HIGHRESERVE SUPPLY FAULT Reserve Fail Input HIGHRESERVE FREQ FAULT Res F Out of Limits Input HIGHRESERVE VOLTS HIGH Reserve Voltage High Input HIGHRESERVE VOLTS LOW Reserve Voltage Low Input HIGHSTATIC SWITCH FAULT Static switch Fail Input HIGHHARMONIC FILTER OPEN Harmonic Filter Open Input HIGHBATT. CHARGE INHIBIT Battery Charge Inhibit Input LOW



5a.5 BUZZER

The buzzer will sound when any alarm goes active. For some alarms there is adelay before the buzzer sounds.These delays are as follows:

Primary Supply Fail 30 SecondsPrimary Phase Fail 30 SecondsBattery Discharging 30 SecondsDC Voltage High 30 SecondsOut of Sync 30 SecondsInverter Volts Low 10 SecondsOverload 10 SecondsLoad On Reserve 30 SecondsReserve Supply Fault 30 SecondsReserve Volts High 30 SecondsReserve Volts Low 30 SecondsReserve Freq Fault 30 Seconds

In each case, the LED mimic and LCD messages will be updated as soon as thealarm becomes active. Only the sounding of the buzzer is delayed.The buzzer will be cancelled when all alarms clear or can be manualIy clearedby pressing the buzzer mute key. If the mute key is pressed after an alarm goesactive but before the above delay has passed, this will not prevent the buzzersounding at the end of the delay.

5a.6 LEDS

There are six LEDs on the UPS mimic which show at a glance the operatingcondition of each block of the UPS.Five LEDs are green and are one for each block as indicated by the mimic linediagram:

Rectifier,Battery,Inverter,Reserve,Load.

A continuous green LED indicates that that block is operating normally. Aflashing green LED indicates a fault or alarm condition in the correspondingblock of the UPS.The following list shows which LEDs are affected by which alarms:



– RECTIFIER LED:PRIMARY FAILPHASE SEQUENCE ERRORBATTERY DISCHARGINGDC VOLTAGE HIGHDC VOLTAGE LOWHARMONIC FILTER OPEN

– BATTERY LED:BATTERY FAULTBATTERY CONTACTOR OPENSHUTDOWN IMMINENTDC VOLTAGE HIGHDC VOLTAGE LOWBATT. CHARGE INHIBIT

– INVERTER LED:INVERTER FAULTINVERTER BLOCKEDINVERTER INHIBITEDOUT OF SYNCOVER TEMPERATUREBYPASS SWITCH CLOSEDSHUTDOWN IMMINENTDC VOLTAGE HIGHDC VOLTAGE LOWINVERTER NOT RUNNINGINVERTER VOLTS HIGHINVERTER VOLTS LOWOVERLOADSTOP DUE TO OVERLOADDESATURATIONCURRENT LIMIT



– RESERVE LED:RESERVE SUPPLY FAULTRESERVE VOLTS HIGHRESERVE VOLTS LOWRESERVE FREQ FAULTSTATIC SWITCH FAULTBACKFEED PROT ACTIVE

– LOAD LED:LOAD ON RESERVELOAD NOT SUPPLIEDINVERTER FAULTBYPASS SWITCH CLOSEDSTATIC SWITCH FAULTOVERLOAD

The sixth LED is red and is a summary alarm LED.This LED is normally off and comes on when any alarm goes active.If the buzzer is sounding, the red LED is on continuously.If the buzzer is muted, the red LED flashes to indicate that the fault condition hasbeen accepted by the user.When all alarms clear, the red LED will return to its normal off condition.

5a.7 Inverter Stop/Start

The inverter start and stop keys on the front panel are monitored by themicroprocessor.If the inverter is not running or if it is stopped due to a fault condition (InverterBlocked), the inverter on key can be used to start the inverter.The system first resets any latched alarms.ExternalIy latched alarms are reset by pulsing the inverter reset line low. If anyblock condition still exists, the inverter remains blocked. If not, the systemchecks for an inhibit condition.If an inhibit condition exists, the inverter is now inhibited and will start when theinhibit condition clears. Pressing the inverter on key while the inverter is runningor while it is inhibited has no effect.If the inverter is running, it can be stopped by pressing the inverter stop key.This key must be held pressed for two seconds before the inverter will stop,except in system test mode. While the key is held pressed and the inverter is stillrunning, the buzzer will sound continuously as a warning that the inverter isabout to stop. Pressing the inverter stop key while the inverter is blocked, or notrunning has no effect. Pressing it while inhibited will set the inverter to ’notrunning’.



If the unit is powered down, either by opening the main switch or at end ofdischarge, the software remembers the condition of the inverter before itpowered down. If the inverter was running or it was inhibited then when thepower is restored, the inverter will restart automatically. If the inverter was notrunning or was blocked. when the power is restored, the inverter will remain off.

5a.8 RAU and AS400 outputs

There are five outputs which are used to drive the RAU and AS400 interfaces,these are:– System normal output: This is set when there are no active alarms.– Load on Reserve Alarm Output: This is set according to the signal read at load

on reserve input.– Primary Supply Fail Alarm Output: This is set if either the primary supply fail

input or primary phase fail input is active.– Shutdown imminent Alarm Output: This output is set when the shutdown

imminent alarm is active.– Inverter Fail Alarm Output: This is set if any of the following conditions is

active:Out of sync alarm,Over temperature alarm,Inverter fail input,Inverter voltage high,Inverter voltage low,Overload with load in inverter.

Each output has a delay of 10 seconds before it goes active following its respectivealarm being set. The outputs will go off as soon as the alarm clears.This is to prevent transients from unnecessarily alerting the user.

5a.9 POWER HISTORY

The POWER HISTORY function continuously records all information onalarms and measurements in a circular buffer. The buffer holds all of the alarmsand measurements which are accessible through the display.If a fault occurs which causes an inverter block, the power history functioncontinues recording information for a further one second and then freezes.At this point, all alarms and measurements are saved from up to 10 seconds beforethe inverter block to one second after it in 0.1 second steps.



5a.9.1 Display Power History

To display the power history information when it has been made available dueto an inverter block, it is necessary to move across the columns of information

using the key until the power history entry message is displayed:

POWER HISTORY

DOWN TO ACCESS

This message indicates that information is available and would not otherwisebe displayed.

Pressing the key at this point moves into the power history information.When power history information is displayed, the arrow keys are re–defined.

The and move backwards and forwards through time in 0.1 second steps.This takes it possible to determine the exact moment in which an alarm becameactive with respect to another alarm or measurement change, so the actualsequence of events leading up to the inverter block can be examined.

The key moves from one alarm to the next.Only alarms which were active at some time during the eleven second historyperiod will be displayed. This makes it easier to locate a particular alarm withoutthe need to step through a long list of alarms which do not apply.When the power history information is first accessed, the display shows the firstalarm which was active and its condition at time = 0.0 seconds, the instant at whichthe block occurred.– The top line shows the time in seconds relative to the moment the block

occurred– The bottom line of the display shows the alarm message– The top line shows on the right hand side, whether the alarm was on or off at this

moment in time.

Pressing the key moves through each of the active alarms.After the last alarm the option is given to exit from the power history information

by pressing the key:

POWER HISTORY

UP TO EXIT

Pressing returns to the history entry message and then moves on throughthe columns of information as described in Section 2.

Pressing the key when the exit message is displayed does not exit from thepower history but moves on to display the measurements.



Measurements are displayed on the bottom line of the LCD. The top line showsthe Section of the UPS to which the readings refer and time, relative to the momentthe block occurred, at which the readings were taken.

Pressing the key now moves through the measurements and then back to thefirst alarm.

5a.9.2 Manual Power History Request

A power history block may be manually requested at any time by pressing the

and keys simultaneously.From this moment in time, information is recorded up to 10 seconds before andone second after in 0.1 second steps.When all information has been saved, the display will automatically change toshow the first activated alarm and its condition at the moment of the request (time= 0.0 seconds).If the power history had already been blocked before the manual request wasmade, power history information would still be displayed as described. However,the information displayed it that which was captured when the block occurred,and not when the manual request was made.

5a.9.3 Power History Restart

The power history function will automatically start to collect new informationif the inverter is running and the power history data is not being displayed. Oncenew information has started to be collected, all old information is lost. Thus if theinverter is restarted following a block condition before the information hasbeen reviewed, it will not be possible to access this information which is now lost. If, however, the inverter should be blocked again, then information will becaptured about this new block.This information will remain available until the inverter is again restarted.If the information has been manually requested, and no inverter block hasoccurred, this information will be lost as soon as the exit power history option isselected.



5a.10 Battery autonomy

This is the calculation of the remaining time before inverter stop due to DCVOLTAGE LOW.Battery autonomy and discharge time are only displayed when the battery isdischarging.When it is displayed, it becomes the top row of the first column of information andhence will be displayed automatically if no arrow key has been pressed in the lastfive minutes.The top line of the LCD shows the UPS rating while the bottom line shows theautonomy time remaining and the discharge time already passed in minutes.The discharge time will not start counting unless the inverter is running, butonce started will continue to count until the end of discharge is reached even if theinverter stops running before this.The autonomy is initially shown as in calculation although the software is not ableto calculate the autonomy during the initial part of the discharge curve.When the battery voltage has fallen below 1.98 volts per cell and a further 30seconds have passed, the software makes the first attempt at calculating thebattery autonomy, and the result is displayed.The calculation is based on battery voltage and the change in battery voltage sincethe last calculation.– If the fall in battery voltage since the last calculation is less than 17mV/Cell

then no calculation is made.If it does not fall by this amount within one minute then a new calculation isforced each minute, until this voltage gap has passed,

– If the battery voltage rises slightly between readings, no new calculation ismade.If this rise is greater than 5mV/Cell, the display shows AUTONOMY INCALCULATION and the software then waits for the voltage to start fallingagain.



5a.11 RS232 port

The RS232 port is handled by software.Its function depends on the setting of display board DIL switch SW2.1– If SW2.1 is ON, the serial port is used for the EASY option.– If SW2.1 is OFF, a terminal can be connected to the serial port through which

certain debugging and test facilities are made available.These facilities are intended for use by Engineering only and are not discussedin detail here. Indiscriminate use of these facilities may lead to malfunctioningof the UPS.

The Baud rate for the serial port is set by DIL switches SW2.2 and SW2.3 (SeeSection 5a.14).These switches are only read once when the machine is switched on so if it isnecessary to change them, the machine must be powered down.When using the EASY 10 or EASY 1000 options, DIL switches SW2.3 to SW2.7must be set to select the UPS identifier number.For EASY 10 or EASY 1000 where only one UPS is connected to the P.C. all ofthese switches must be set OFF (UPS number 1).Where more than one UPS is connected to a single P.C. using the EASY 1000option, each UPS must have a different UPS identifier. Commencing from one,each UPS Must be numbered consecutively. (See Section 5a.14).It is possible, in terminal mode, to change the UPS rating through the RS232 port.This requires a password to be entered.If the UPS rating is not altered in this way, then the DIL switch setting is used.Once set in this way, the DIL switches are ignored, unless the option to use theDIL switches is selected from the terminal.

5a.12 Inverter Voltage control

The microprocessor can automatically regulate on the inverter voltage.



5a.13 EDP70 Display Board trip settings

The following is a list of voltage and current trip points which are controlled by thedisplay control board.

INVERTER VOLTAGE 380V 400V 415V

Inverter Voltage LOW 342.0V 360.0V 373.5VInverter Voltage HIGH 418.0V 440.0V 456.5VHysterisis for Inverter Low Trip 2.0V 2.0V 2.0V

DC VOLTAGE 144 cells 198 cells

Low DC Trip 237.6V 326.7VLow DC Trip Reset 309.6V 425.7VVDC Battery Discharging (for Alarm) 316.8V 435.6VVDC Shutdown Imminent * 252.0V 346.5VMinimum Battery Test Voltage 273.6V 376.2VHigh DC Trip 345.6V 475.2VHigh DC Trip Reset 340.0V 467.5V

* = shutdown imminent is reset when battery is no longer discharging (i.e. > VDCbattery Discharging).



LOAD CURRENT @ 380V10kVA 15kVA 20kVA 30kVA 40kVA 50kVA 60kVA

Overload Trip Current16.0A 23.9A 31.9A 47.9A 63.8A 79.8A 95.7A

Overload Trip ResetCurrent 14.4A 21.7A 28.9A 43.3A 57.7A 72.2A 86.6AMax Peak LoadCurrent * 38.0A 57.0A 76.0A 114.0A 151.9A 189.9A 227.9AMax RMS LoadCurrent * 15.2A 22.8A 30.4A 45.6A 60.8A 76.0A 91.2A



Overload Trip ResetCurrent 13.7A 20.6A 27.4A 41.1A 54.8A 68.6A 82.3AMax Peak LoadCurrent * 38.0A 57.0A 76.0A 114.0A 151.9A 180.4A 216.5AMax RMS LoadCurrent * 14.4A 21.7A 28.9A 43.3A 57.7A 72.2A 86.6A



Overload Trip ResetCurrent 13.2A 19.8A 26.4A 39.6A 52.9A 66.1A 79.3AMax Peak LoadCurrent* 38.0A 57.0A 76.0A 114.0A 151.9A 173.9A 209AMax RMS LoadCurrent * 13.9A 20.9A 27.8A 41.7A 55a.6A 69.6A 83.5A

* = Used for percentage load calculation



5a.14 DIL Switch definitions

OUTPUT VOLTAGE 400V TEST 380V 400V 415V

SW1.1 OFF ON OFF ONSW1.2 OFF OFF ON ON

DC VOLTAGE 144 cells 198 cells

SW1.3 ON ONSW3.2 OFF OFF

UPS RATING 10kVA 15kVA 20kVA 30kVA 40kVA 50kVA 60kVA

SW1.4 OFF ON OFF ON OFF ON OFFSW1.5 OFF OFF ON ON OFF OFF ONSW1.6 OFF OFF OFF OFF ON ON ONAny non valid combination will result in 10kVA but should not be used.

System test Mode

SW1.8 ON = System test ModeOFF = normal UPS operation



Serial Port Function

SW2.1 ON = EASY 10OFF = test terminal

Port Baud Rate Setting 1200 4800 9600 19200

SW2.2 OFF ON OFF ONSW2.3 OFF OFF ON ON(default setting = 9600 )

UPS Identifier for EASY–1000 Software

SW2.7 SW2.6 SW2.5 SW2.4UPS nº 1 OFF OFF OFF OFF (normal setting)UPS nº 2 OFF OFF OFF ONUPS nº 3 OFF OFF ON OFFUPS nº 4 OFF OFF ON ONUPS nº 5 OFF ON OFF OFFUPS nº 6 OFF ON OFF ONUPS nº 7 OFF ON ON OFFUPS nº 8 OFF ON ON ONUPS nº 9 ON OFF OFF OFFUPS nº 10 ON OFF OFF ONUPS nº 11 ON OFF ON OFFUPS nº 12 ON OFF ON ONUPS nº 13 ON ON OFF OFFUPS nº 14 ON ON OFF ONUPS nº 15 ON ON ON OFFUPS nº 16 ON ON ON ONWhere only one UPS is connected to a PC, set to UPS number = 1 (i.e. SW2.4 toSw2.7 all OFF)

Pcb Self Test

SW2.8 OFF = pcb self test procedure – use only with self test rig.ON = normal pcb operation.

UPS TYPE

SW3.1 ON = EDP70SW3.4 OFF = European Series


Para 5b = SOFTWARE DESCRIPTION ( FSB >= 30 )

5b SOFTWARE FUNCTIONAL DESCRIPTION(for UPS having FSB status > = 30)

5b.1 General

The software for the microcontroller on the display control board reads all of thedigital inputs, analog inputs and both frequency inputs.It generates alarms which cause messages to be displayed and outputs from thedisplay control board to be driven.This document describes the conditions which need to be met in order to generateeach of the messages and outputs.On the appendix A is possible to find a multi–language alarms list with an accurategeneration description.All digital inputs are read once every 100mSec.Analog and frequency measurements are also read every 100mSec. All digitalinputs are not filtered in software as filtering is performed in hardware bycapacitors mounted on the PCB.Analog measurements, including frequencies, are filtered. This filter takes theaverage of a given number of samples and is updated every time a new sample istaken.

5b.2 Accessing Information

All of the information can be accessed through the LCD Display by using the 3arrow keys on the front panel of the UPS.

The information is arranged in columns. The and keys allow movement

up and down the selected column and the key moves from one column to thetop row of the next column.



5b.2.1 The first column contains information relevant to the UPS as a whole.The first page will normally show the UPS rating on the first line with one of thefollowing messages on the second:

SYSTEM NORMAL

TESTING BATTERY

TESTING AUTONOMY

E.P.O. ACTIVE

NOT CALIBRATED

SYSTEM TEST MODE

SYSTEM IN ALARM

If the battery is discharging or the inverter is in overload operation then anadditional page of information is inserted at the top of the first column.This will be in the form:

BATTERY DISCHARGING

AUT **min DIS **min

or

OVERLOAD

INV STOP **m:**s

If both conditions are true then both pages of information will be accessible.The top of the column will be the one showing the shortest time before invertershutdown.If none of the arrow keys is pressed, then after 5 minutes the display will return tothe top page of the first column of information.This top page will automatically change according to the UPS operating conditionas described above.



Following the UPS status, each of the measurements available in the UPS can bedisplayed. These are:

D.C. Voltage and Rectifier CurrentD.C. Voltage and Battery CurrentInverter Voltage and FrequencyReserve Voltage and FrequencyLoad Voltage and FrequencyLoad CurrentsLoad Percentage LoadingLoad Peak FactorTotal time on InverterTotal time on ReserveNumber of mains failures and Total DurationTotal number of mains failures and Total Duration

Pressing the key moves down through this list. The key can be used tomove back up.At the end of the measurements, the software code, revision and release date isdisplayed.Note that the revision and release date of the software is also displayed for 2seconds when the machine is switched ON.



5b.2.2 The second column contains information relevant to the Rectifier and Battery.The first line of the display will show:

RECT/BATT ALARMS


NO ALARM ACTIVE

NOT CALIBRATED

DC FEEDBACK FAULT

VERIFY DC FEEDBACK

PRIMARY SUPPLY FAIL

PHASE SEQUENCE ERROR

BATTERY FAULT

PCB SUPPLY FAULT

BATT CONTACTOR OPEN

BATTERY DISCHARGING

SHUTDOWN IMMINENT

DC VOLTAGE HIGH

DC VOLTAGE LOW

INPUT SWITCH OPEN

HARMONIC FILTER OPEN

RECTIFIER ALARM

RECTIFIER INHIBITED

RECTIFIER BLOCKED

BATT. CHARGE INHIBIT



D.C. Voltage and Rectifier CurrentD.C. Voltage and Battery Current



5b.2.3 The third column contains information relevant to the Inverter.The first line of the display will show:

INVERTER ALARMS


NO ALARM ACTIVE

NOT CALIBRATED

PCB SUPPLY FAULT

OUT OF SYNC

DESATURATION

OVER TEMPERATURE

BYPASS SWITCH CLOSED

SHUTDOWN IMMINENT

DC VOLTAGE HIGH

DC VOLTAGE LOW

INVERTER NOT RUNNING

INVERTER INHIBITED

INVERTER BLOCKED

INVERTER VOLTS HIGH

INVERTER VOLTS LOW

OVERLOAD

STOP DUE TO OVERLOAD

CURRENT LIMIT

INVERTER STATIC SWITCH FAULT

INVERTER FREQUENCY OUT OF RANGE 8%

INVERTER FEEDBACK FAULT

VERIFYING INVERTER FREQUENCY

VERIFYING BATTERY CONTACTOR

INVERTER FREQUENCY OUT OF RANGE 1%





Inverter Voltage and Frequency.Inverter current

5b.2.4 The fourth column contains information relevant to the Load and Reserve.The first line of the display will show:

LOAD/RES ALARMS


NO ALARM ACTIVE

NOT CALIBRATED

LOAD ON RESERVE

LOAD NOT SUPPLIED


RESERVE SUPPLY FAULT

RESERVE FREQ FAULT

RESERVE VOLTS HIGH

RESERVE VOLTS LOW

STATIC SWITCH BLOCKED ON INVERTER

STATIC SWITCH BLOCKED ON RESERVE

INVERTER STATIC SWITCH FAULT

OVERLOAD

OUTPUT SWITCH OPEN

RESERVE SWITCH OPEN

PHASE SEQUENCE FAULT

RESERVE INHIBITED




After the last active alarm, pressing the key will move through the followingpage of measurements:

Load Voltage and FrequencyLoad CurrentPercentage LoadingLoad Peak FactorReserve Voltage and Frequency

5b.2.5 The fifth column is normally used to select the language for LCD messages.

Using the and keys changes the language and pressing the key returnsto the first column with the messages displayed in the selected language.Once a language has been selected, this will remain in use until it is changed usingthe language selection column.If the UPS is switched OFF and then ON again it will power up in the selectedlanguage.

If POWER HISTORY information is available the pressing the key from thefourth column will cause the LCD to display:

POWER HISTORY

DOWN TO ACCESS

Pressing the key will now enter into the Power History information.When the Power History is exited, the display will return to this entry message.

Pressing the key from here will move on to the language selection column,

and pressing again will return to the first column.If no key is pressed for 5 minutes, the display changes back to the top row of thefirst column of information.



5b.3 Measurements

5b.3.1 D.C. voltage

One sample is taken every 100mSec and the displayed reading is filtered over 8consecutive samples.This reading is scaled related to the battery elements number as follow:

Elements Sense Input Displayed readings144 2.215 V 326.0 V198 2.215 V 449.5 V240 2.215 V 544.8 V

5b.3.2 Rectifier Current

One sample is taken every 100mSec and the displayed reading is filtered over 8consecutive samples.A sense voltage of 1V corresponds to a current of 36.4A with 144 battery elementsand to 72.8A with 198 or 240 battery elements.

5b.3.3 Battery Current

One sample is taken every 100mSec and the displayed reading is filtered over 8consecutive samples.Positive and negative battery currents are read as two separate readings.If:– the battery is discharging, or– the rectifier has been shutdown due to DC overvoltage, or– the battery is being tested,then the negative current is displayed, otherwise the positive reading is used.A positive current of 12.5 Amps gives a sense voltage of 1V.A negative current of 83.3 Amps gives a sense voltage of 1V.



5b.3.4 Inverter Voltage and Frequency

The inverter voltage is full wave rectified and smoothed in hardware.This DC level is then read once every 100mSec. and the display reading is filteredover 2 consecutive samples.The sampling is synchronized to the inverter frequency to overcome aliasingeffects caused by the ripple on the DC level.A DC level of 1.6V will give a displayed voltage of 240V.The inverter frequency is determined from the period of one complete cycle every100mSec.The displayed reading is filtered over 2 consecutive samples. The period is thetime between two consecutive positive going edges at pin 16 of themicrocontroller.

5b.3.5 Reserve Voltage and Frequency

The reserve voltage is full wave rectified and smoothed in hardware.This DC level is then read once every 100mSec and the display reading is filteredover 2 consecutive samples.The sampling is synchronized to the reserve frequency to over come aliasingeffects caused by ripple on the DC level, thus if the reserve frequency signal is notpresent, the displayed voltage will be zero.A DC level of 1.11V will give a displayed voltage of 240v.The reserve frequency is determined from the period of one complete cycle every100mSec. This is taken from the output of the reserve zero crossing detector as thetime between two consecutive positive going edges at pin 17 of themicrocontroller.The displayed reading is filtered over 2 consecutive samples.



5b.3.6 Load Current

The load current waveform is sampled every 250 microseconds for one completecycle.From these samples an RMS calculation is performed.This sampling is performed on one cycle every 100mSec and the displayed valueis filtered over 2 consecutive RMS readings.The start and end points for the samplings are taken from the inverter zerocrossing detector, which is the signal used to determine the frequency.If this frequency signal is not present, then the displayed current will be zero. Thisreadings is scaled related to the machine rating as follow:

Machine rating Sense Input Displayed readings10–15–20 kVA 1 V 37.2 A30–40 kVA 1 V 73.0 A50–60 kVA 1 V 109.2 A

5b.3.7 Load Peak Factor and Percentage

The peak factor of the load current is obtained by dividing the filtered value of thepeak load current by the filtered value of the RMS load current.The filtered value of peak load current is taken over 2 consecutive samples.The percentage RMS load current is calculated from the filtered RMS load currentdivided by the max RMS load current.The percentage peak load current is also calculated from the filtered peak loadcurrent divided by the max peak current.The displayed value is the highest of these two values.

5b.3.8 Total time on inverter

This page shows the total time the load has been supplied by inverter since the lastmachine off.

5b.3.9 Total time on reserve

This page shows the total time the load has been supplied by reserve since the lastmachine off.



5b.3.10 Total mains fail number and duration

This page shows the total number of mains failure and the total duration since themachine installation.The value is recorded on a non volatile memory so it is not lost when the machineis off.It is possible to reset this values by setting and resetting the SW 1.8 on the displayboard.

5b.4 ALARM MESSAGES AND DIGITAL OUTPUTS.

Alarm messages and digital outputs are set on the basis of conditions set at thedigital inputs and also by conditions set by the level of the displayed analogreadings.For trip settings of analog measurements, refer to Section 5b.15.

5b.4.1 Not calibrated

There are two kinds of “not calibration”: primary not calibration and secondarynot calibration.If the alarm “NOT CALIBRATED” appears on the first column it is a secondarynot calibration.In this case the system works correctly but the language and the number of mainsfaults is lost. The alarm can be reset by selecting the language.If the alarm “NOT CALIBRATED” appears on all the other columns it is aprimary not calibration. In this case the software has shutdown the rectifier,opened the battery contactor, blocked the inverter and all the leds will flash.See section 5b.8 “Data storage method” for other details.



5b.4.2 Testing Battery and Battery Test Output

A battery test is automatically initiated every seven days minus 5 hours after theunit is switched on.To initiate the test the microcontroller sets the BATTERY TEST output low andthe message “TESTING BATTERY” replaces the “SYSTEM NORMAL”message on the display.This automatic test is inhibited for two days following one of the below conditionto prevent the testing of a discharged battery:

primary mains faultinput breaker openbatt dischargingdc feedback fault

A battery test is also initiated following a DC voltage high condition to preventovercharging of the batteries.

A battery test can be manually initiated by pressing both and keys on thedisplay simultaneously.This manual test is not inhibited following a mains failure. The next automatic testwill occur one week after a manually requested test.The test lasts one minute during which time the battery voltage is continuouslymonitored.If the voltage falls below the Minimum Battery Test Voltage given in Sec. 5b.15then the test is terminated and the alarm BATTERY FAULT is generated,otherwise the test is terminated after one minute and no alarm is generated.If the BATTERY FAULT alarm was active prior to the test, then the alarm iscancelled while the test is being made and may be set again depending on the testresult.At the end of the test, the BATTERY TEST output is reset high and after 10seconds the TESTING BATTERY message is cleared.This allows 10 seconds for the rectifier to phase up following the removal of thebattery test signal.A battery test is automatically initiated at the start up 5 sec. after the system isnormal but only if the battery are not discharged (Ibatt.pos < 1 A).This gives the possibility to check the battery connection after the UPSinstallation.



5b.4.2A Testing Autonomy

A second type of battery test can also be performed.

This can be only manually initiated by pressing the and keyssimultaneously for two seconds.This test shuts the rectifier down using the rectifier shutdown output so that thebattery is discharged.At the end of discharge, the inverter stops, the rectifier is restored and as therectifier phases up, the inverter restarts automatically, thus returning to systemnormal.The test is inhibited if the reserve is outside limits.During the test, the message “TESTING AUTONOMY” replaces the “SYSTEMNORMAL” message on the display and the battery autonomy can be read. At theend of the test, 15 seconds are allowed for the rectifier to restart before the“TESTING AUTONOMY” message is removed.

The test can be manually terminated by pressing the and keyssimultaneously and holding for 2 seconds.

5b.4.3 Rectifier Shutdown Output

There are several conditions that can set the rectifier shutdown output.These are split in conditions that inhibit the rectifier, if they are not permanent, orin conditions that block the rectifier if they are permanent.

5b.4.4 Rectifier Inhibited

The rectifier inhibited alarm is active if one of the following conditions is present:high dcEPO requestnot calibrated and not system test

If the DC voltage rises above the HIGH DC trip level given in Section 5b.15 andremains high for more than 2 seconds, the microprocessor generates a signal toshutdown the rectifier.When the DC level has fallen the rectifier is allowed to restart.While an EPO REQUEST is present the software shutdown the rectifier.See section 5b.4.24 EPO request for other details.While the system is primary not calibration condition and not in test the rectifier isshutdown.See section 5b.8 “Data storage method” for other details.



5b.4.5 Rectifier blocked

The rectifier blocked alarm is active if the following action is present:dc feedback faultSee section next section for other details.

5b.4.6 Dc feedback fault

This alarm is generated if the dc feedback signal is interrupted.The software executes 2 tests: the first, during the start up, checks that the dcvoltage is in compliance with the rectifier start up control system (See the section5b.9 “Rectifier start up control” for other detail.).The second, each 100 msec. during the normal status, checks that the dc voltage isin compliance with and the battery current.If the dc feedback is fault the dc voltage rise but the microcontroller sense inputgoes to 0v.So there will be the condition of vdc under the loss dc reaction trip voltage with thebattery charging.If this condition is met the alarm is generated(See the section 5b.15 for thresholdvalue).The alarm is latched by software and block the rectifier and inhibit the inverter: it

is possible to reset the alarm and start the rectifier by pressing the and keyssimultaneously as for the autonomy test.

5b.4.7 Verify dc feedback

This message appears while the dc voltage is rising but it has not reached thebattery closure threshold.See the section 5b.9 “Rectifier start up control” for other detail.



5b.4.8 Rectifier alarm

There are many conditions that can shutdown the rectifier but the software can’tbe informed about them.So it has been generated this alarm that checks the rectifier status: it needs thefollowing condition to be set:

batt discharging AND(dc voltage < vdc 210 battery discharging) ANDnot primary mains fault ANDnot rectifier shutdown output ANDnot recharge inhibit ANDnot battery contactor open ANDnot inv overload

The alarm is cleared if one of the following conditions are matched:not batt discharging OR(dc voltage > vdc 215 battery discharging) ORprimary mains fault ORrectifier shutdown output ORrecharge inhibit ORbattery contactor open ORinv overload

The alarm has no effect on the the hardware.See section 5b.15 for Vdc levels.

5b.4.9 Battery Discharging

This alarm is generated when the DC voltage falls below the VDC 215 BATTERYDISCHARGING level.The alarm is cleared either when the voltage rises above VDC 217 BATTERYDISCHARGING level or when the positive current into the battery is above 1Amps.See section 5b.15 for Vdc levels.



5b.4.10 Shutdown Imminent

This alarm is generated when the DC voltage falls below the VDC SHUTDOWNIMMINENT level given in Section 5b.15.The alarm is cleared when the BATTERY DISCHARGING alarm is cleared orwhen the DC VOLTAGE LOW alarm comes ON.The SHUTDOWN IMMINENT level increases for long discharges.




– from 10 hours onwards–> it is fixed at 1.9Vpc.

5b.4.11 DC Voltage High

This alarm is generated when the DC voltage rises above the HIGH DC TRIP levelgiven in Section 5b.15.It is cleared when the DC voltage falls below the HIGH DC TRIP RESET level.

5b.4.12 DC Voltage Low

This alarm is generated when the DC voltage falls below the LOW DC TRIP levelgiven in Section 5b.15.It is cleared when the DC voltage rises above the LOW DC TRIP RESET level. Itwill also be cleared if the positive battery current into the battery is above 1 Amps.The LOW DC TRIP level increased for long discharges




– from 10 hours onwards–>it is fixed at 1.8Vpc.



5b.4.13 Out of Sync

This alarm is not generated in software, but is read from the system through one ofthe digital inputs.It can however be inhibited in software by any of the following conditions:

– Inverter Off

– Reserve Overloaded Causing Inverter to Current Limit

– Reserve Fault

5b.4.14 Inverter Volts High & Inverter Volts High Output

This alarm is set when the inverter voltage rises above the INVERTERVOLTAGE HIGH level given in Section 5b.15 and is then latched and causes theinverter to stop.The alarm is cleared when the inverter is restarted.The alarm is masked if a open battery contactor request is present to avoid falsealarm generation. The output is held HIGH while the alarm is active.

5b.4.15 Inverter Volts Low & Inverter Volts Low Output

This alarm and output (active high) are both set when the inverter voltage fallsbelow the INVERTER VOLTAGE LOW level given in Section 5b.15.They are both cleared with the inverter voltage rises above this level by thespecified Hysterisis for the inverter trips.The alarm is also inhibited when the inverter is off or when the reserve isoverloaded forcing the inverter to fold back under current limit.The output signal is not inhibited by these conditions.

5b.4.16 Overload and Overload Output

This alarm is set when the R.M.S load current rises above the OVERLOAD TRIPCURRENT given in Section 5b.15.It is cleared when the R.M.S load current falls below the NOMINAL RMS LOADCURRENT.If load is on inverter then this alarm appears in the page INVERTER ALARMS aswell as in the LOAD/RES ALARMS page.This OVERLOAD OUTPUT is only set HIGH if load is on reserve.



5b.4.17 Stop Due to Overload

The overload operation is allowed for a duration dependent on the overloadpercentage:–– An overload of 125% is allowed for 10 min.,– An overload of 150% is allowed for 10 sec.,

Above these values, the inverter is stopped, and automatically restarts after 10min.If the overload duration doesn’t reach the above values, the inverter isn’t stopped,but its nominal overload duration decreases depending on the operation statusbefore and after the overload.I.e.: after an overload of 125% during 9min and 59sec, the UPS reaches again itsnominal overload duration after 1 hour if it works at 100% load, but after 10 min ifit works without load.The overload capacity is based on two curves which represent the time T(inseconds) before overheating of the magnetics or heatsink occurs at a given per unitloading, K1.Whilst in overload, a proportion of the thermal capacity is used up as follows:

A1 = T1 x (K12 – 1) for the magnetics

A2 = T2 x (K1 – 1.25)2 for the heatsinkwhere A1 max = 337.5 and A2 max = 0.625

Below 100% loading, another curve which relates the load percentage to the time,calculates the time required to obtain again the nominal overload capacity.

5b.4.18 Current Limit

This alarm is generated when either the mean current limit input or the peakcurrent limit input go active (HIGH).The mean current limit input is masked if it is caused by an overload while the loadis on reserve.

5b.4.19 Load not Supplied

This alarm is generated if neither load on reserve or load on inverter inputs areactive (HIGH) and the bypass switch is not closed.It will also be generated if the load is on inverter but the inverter is off.



5b.4.20 Inverter Not Running

This alarm is generated if the inverter has been stopped by pressing the inverter offkey, or if the inverter has not yet been started.It is not generated if the inverter is stopped due to a fault condition.The inverter can be started by pressing the inverter start key.

5b.4.21 Inverter Inhibited

The inverter may be inhibited by:–– EPO request (See below),– D.C. voltage is high for more than 2 seconds,– D.C. voltage is low,– bypass switch is closed and the output switch is NOT open,– overload time–out.– dc feedback faultThe inverter will not be inhibited for D.C. voltage low, for overload time–out andfor dc feedback fault if the system test mode switch (SW1.8) is ON.When all of these conditions are clear, the inverter will automatically restart.

5b.4.22 Inverter Blocked

The inverter will be blocked:–– by the inverter fail input going active (HIGH),– over–temperature,– inverter voltage high,– by an inverter static switch fault.– first level not calibration– inverter frequency out of range– inverter backfeed faultIt will not be blocked for inverter voltage high, for first level not calibration andfor inverter backfeed fault if in system test mode (SW1.8 ON).The alarm can be cleared and the inverter restarted by pressing the inverter startkey provided that the fault condition does not still exist.



5b.4.23 System Test Mode

This message indicates that DIL switch SW1.8 is ON which puts the system into a’TEST MODE’.In this mode the software functionally changes as follows:– Inverter can be stopped quickly by pressing the inverter off key. It is not

necessary to hold it pressed for 2 seconds.– Inverter wilt not be inhibited for an overload time–out.– Inverter will not be inhibited for D.C. voltage low.– Inverter will not be inhibited for dc feedback fault.– Inverter will not be blocked for inverter overvoltage.– Inverter will not be blocked for primary not calibration.– Inverter will not be blocked for inverter feedback fault.–The buzzer does not sound but the alarm leds are on or flashing.

5b.4.24 EPO active

An EPO request is generated by pulling the inverter reset line low.The software checks that this is not caused by the bypass breaker being closed andthen stops the inverter and opens the battery contactor and shutdown the rectifier.The software waits for the pcb supply off before consider the epo signal again: inthis way the machine shutdown is correctly managed.If the inverter reset line is released, the battery contactor will close and the rectifierand inverter will restart.Due to the E.P.O. hardware on the interface board, the signal has to persist at leastfor 400 msec. to guarantee the recognizing.

5b.4.25 Bypass Switch Closed

This alarm is generated when the bypass switch closed input is pulled high.The external hardware stops the inverter and opens the battery contactor. Toprevent battery charge current from causing arcing across the contactor terminals,the Software forces the rectifier to phase back by initiating a dummy battery test.Once the contactor is open, the battery test is cancelled.

5b.4.26 Inverter feedback fault

This alarm is generated if the inverter voltage feedback is interrupted.The software checks, every 100 msec., that the inverter voltage does not go underthe 60 % of nominal voltage with the inverter in normal condition.The alarm blocks the inverter and it is not active with the machine in test mode SW1.8 = ON.



5b.4.27 Inverter frequency out of range 1% andVerifying inverter freq.

The inv. freq. out range 1% alarm is generated if the inverter is start up with out thereserve and if the frequency does not reach the nominal value +– 1% after 15 sec.During the 15 sec. if the frequency is out the 1% window the “verifying inv. freq.”alarm will appear on the INVERTER ALARMS column.The alarm will be reset when the frequency goes inside the +– 1% window. Thenominal frequency value is selected by the SW 3.6 (OFF = 50 Hz, ON = 60 Hz).

5b.4.28 Inverter frequency out of range 8%

This alarm is generated by a software inverter frequency test.If it goes out a window of + – 8% of the nominal value for more than 5 sec. thealarm is generated and the inverter is blocked.The nominal value is selected by the SW 3.6 (ON = 60 Hz; OFF = 50 Hz)

5b.4.29 Pcb supply fault

This alarm is generated from a defect of the inverter control board supply.The cause could be the chopper fuse blown. The alarm has no effect on thehardware and is not latched.It appears both on the RECTIFIER/BATT ALARMS column and the INVERTERALARMS column.

5b.4.30 Verifying battery contactor

This message appears on the INVERTER ALARMS column when the startinverter is active before the battery contactor has been closed.When the inverter starts the message disappears.See section 5b.7 “Inverter start/stop ” for other details.

5b.4.31 Inverter static switch fault

This alarm appear both in the INVERTER ALARMS section and in theLOAD/RES ALARM section.It indicates that a voltage greater than 1/3rd of the nominal AC voltage is present atthe inverter sense port when the inverter is not running. This shows a voltagebeing feed back from the reserve supply through a faulty static switch.If an attempt is made to start the inverter, it will not start and becomes blockeduntil the fault is cleared.



5b.4.32 Static switch blocked on inverter

This alarm is generated if the static switch fail input signal is active (HIGH) and ifthe load is on inverter.

5b.4.33 Static switch blocked on reserve

This alarm is generated if the static switch fail input signal is active (HIGH) and ifthe load is on reserve.

5b.4.34 Primary supply fail

The primary supply fail alarm is generated by the combination of primary supplyfail input (active HIGH) and the primary phase fail input (active LOW ).Due to the hardware characteristic the recorded duration of a mains failure can’tbe less of 15 sec.

5b.4.35 Over temperature and Inverter fail (Desaturation)

The over temperature and the inverter fail alarms are generated respectively bythe over temperature input (active HIGH) and the inverter fail input (activeHIGH).The signals are masked when is present a battery contactor open request to avoidfalse alarms generation.

5b.4.36 Load on reserve,Reserve supply fault,Reserve freq. fault,Reserve voltage high,Reserve phase fail andReserve voltage low.

All the above alarms are generated by the respective input signals (all activeHIGH excepted for reserve phase fail active LOW).The signals are masked when is present an EPO request to avoid wrong alarmswhile the power supply is going down.

5b.4.37 Reserve Inhibited

This alarm is generated when is active an E.P.O. request.



5b.4.38 The following list of alarms depend solely on the levels at theirrespective inputs and are not conditioned in software other than the filteringduring the reading of the inputs and the delays before the sounding of the buzzer.

ALARM INPUT ACTIVE

PHASE SEQUENCE ERROR Primary Phase Fail Input LOWBATT. CONTACTOR OPEN Batt. Contactor Open Input LOWHARMONIC FILTER OPEN Harmonic Filter Open Input HIGHBATT. CHARGE INHIBIT Battery Charge Inhibit Input LOWINPUT SWITCH OPEN Input Switch open HIGHOUTPUT SWITCH OPEN Output Switch open HIGHRESERVE SWITCH OPEN Reserve Switch open HIGH

5b.5 BUZZER

The buzzer will sound when any alarm goes active.For some alarms there is a delay before the buzzer sounds.These delays are as follows:

Primary Supply Fail 30 SecondsPrimary Phase Fail 30 SecondsBattery Discharging 30 SecondsDC Voltage High 30 SecondsOut of Sync 30 SecondsInverter Volts Low 10 SecondsOverload 10 SecondsLoad On Reserve 30 SecondsReserve Supply Fault 30 SecondsReserve Volts High 30 SecondsReserve Volts Low 30 SecondsReserve Freq Fault 30 Seconds

In each case, the LED mimic and LCD messages will be updated as soon as thealarm becomes active. Only the sounding of the buzzer is delayed.The buzzer will be cancelled when all alarms clear or can be manualIy cleared bypressing the buzzer mute key.If the mute key is pressed after an alarm goes active but before the above delay haspassed, this will not prevent the buzzer sounding at the end of the delay.



5b.6 LEDS

There are six LEDs on the UPS mimic which show at a glance the operatingcondition of each block of the UPS.Five LEDs are green and are one for each block as indicated by the mimic linediagram:

Rectifier,Battery,Inverter,Reserve,Load.

A continuous green LED indicates that that block is operating normally.A flashing green LED indicates a fault or alarm condition in the correspondingblock of the UPS.The following list shows which LEDs are affected by which alarms:

– RECTIFIER LED:PRIMARY NOT CALIBRATIONPRIMARY FAILPHASE SEQUENCE ERRORBATTERY DISCHARGINGDC VOLTAGE HIGHDC VOLTAGE LOWINPUT BREAKER OPENHARMONIC FILTER OPENDC FEEDBACK FAULTRECTIFIER INHIBITEDRECTIFIER BLOCKED

– BATTERY LED:PRIMARY NOT CALIBRATIONPCB SUPPLY FAULTBATTERY FAULTBATTERY CONTACTOR OPENSHUTDOWN IMMINENTDC VOLTAGE HIGHDC VOLTAGE LOWBATT. CHARGE INHIBIT



– INVERTER LED:PRIMARY NOT CALIBRATIONDESATURATIONINVERTER BLOCKEDINVERTER INHIBITEDOUT OF SYNCOVER TEMPERATUREBYPASS SWITCH CLOSEDSHUTDOWN IMMINENTDC VOLTAGE HIGHDC VOLTAGE LOWINVERTER NOT RUNNINGINVERTER VOLTS HIGHINVERTER VOLTS LOWINVERTER BACKFEEDOVERLOADSTOP DUE TO OVERLOADCURRENT LIMITWAIT BATTERY CONTAC. CLOSEPCB SUPPLY FAULTINV. BACKFEED FAULTVERIFYING INV.FREQ.INV.FREQ. OUT RANGE 1%

– RESERVE LED:PRIMARY NOT CALIBRATIONRESERVE SUPPLY FAULTRESERVE VOLTS HIGHRESERVE VOLTS LOWRESERVE FREQ FAULTRESERVE PHASE FAILRESERVE BREAKER OPENRESERVE INHIBITEDSTATIC SWITCH BLOCKED ON INVERTERSTATIC SWITCH BLOCKED ON RESERVE



– LOAD LED:PRIMARY NOT CALIBRATIONLOAD ON RESERVELOAD NOT SUPPLIEDINVERTER FAULTBYPASS SWITCH CLOSEDSTATIC SWITCH BLOCKED ON INVERTERSTATIC SWITCH BLOCKED ON RESERVEOVERLOADOUTPUT SWITCH OPEN

The sixth LED is red and is a summary alarm LED.This LED is normally off and comes on when any alarm goes active.If the buzzer is sounding, the red LED is on continuously.If the buzzer is muted, the red LED flashes to indicate that the fault condition hasbeen accepted by the user.When all alarms clear, the red LED will return to its normal off condition.

5b.7 INVERTER STOP/START

If the machine is primary not calibrated the software does not allow the inverter tostart.As explained in the next section, for service purposes, it is possible to enable theinverter start by setting the SW 1.8 in ON (TEST MODE).See next section for other details.The inverter start and stop keys on the front panel are monitored by themicroprocessor.If the inverter is not running or if it is stopped due to a fault condition (InverterBlocked), the inverter on key can be used to start the inverter.The system first resets any latched alarms.Externally latched alarms are reset by pulsing the inverter reset line low.If any block condition still exists, the inverter remains blocked.If not, the system checks for an inhibit condition.If an inhibit condition exists, the inverter is now inhibited and will start when theinhibit condition clears.Pressing the inverter on key while the inverter is running or while it is inhibitedhas no effect.The inverter start is executed by the software only after that the battery contactorhas been closed. If the battery contactor is open and the inverter is starting (both bypush button or from inhibited condition), the message “VERIFYING BATT.CONT.” will appear and the inverter will not start.



If the inverter start is executed without reserve, as the inverter frequency isgenerated by the internal quartz, the software checks that the frequency reachesthe +– 1% nominal frequency window before to give the inverter start.While the software checks the frequency the message “VERIFYING INV.FREQUENCY” appear on the display. See 5b.4.27 for other details.If the inverter is running, it can be stopped by pressing the inverter stop key. Thiskey must be held pressed for two seconds before the inverter will stop, except insystem test mode.While the key is held pressed and the inverter is still running, the buzzer willsound continuously as a warning that the inverter is about to stop.Pressing the inverter stop key while the inverter is blocked, or not running has noeffect.Pressing it while inhibited will set the inverter to ’not running’.If the unit is powered down, either by opening the main switch or at end ofdischarge, the software remembers the condition of the inverter before it powereddown.If the inverter was running or it was inhibited then when the power is restored, theinverter will restart automatically.If the inverter was not running or was blocked. when the power is restored, theinverter will remain off.

5b.8 DATA STORAGE METHOD DESCRIPTION

With the software coded 10H00207.108 a new data storage method has beenadopted.The whole configuration data recorded in the non volatile ram has been spilt in 2parts with different priority levels: PRIMARY and SECONDARY level.Each structure includes a different number of data ended with a checksum value (2bytes) that depends on the data recorded.The PRIMARY structure include the following data:

VALUE DATA LENGTHCALIBRATION 2 bytesSELECTED RATING 1 bytePRIMARY CHECKSUM 2 bytes

This is the most important data recorded: without this data the machine rating islost and the analog measures are not calibrated.If the PRIMARY CHECKSUM is wrong the machine is PRIMARY NOTCALIBRATED.



The SECONDARY structure includes the following data:VALUE DATA LENGTHINV_AUTO_START_ADDRESS 1 byteSELECTED_LANGUAGE_ADDRESS 1 byteMAINS_FAIL_COUNT_ADDRESS 2 bytesMAINS_FAIL_DAYS_ADDRESS 2 bytesMAINS_FAIL_HOUR_ADDRESS 1 byteMAINS_FAIL_MIN_ADDRESS 1 byteMAINS_FAIL_SEC_ADDRESS 1 byteSECONDARY_CHECKSUM_ADDRESS 2 bytes

This is the less important data recorded: without this data the machine loses thelanguage, the inverter auto start and the number of mains failures.If the SECONDARY CHECKSUM is wrong the machine is SECONDARY NOTCALIBRATED.To be compatible with the old data storage method, the above structure has beenwritten in the non volatile ram after the old one: in this way if an old version ofsoftware is used it can read the right data from the same address.The first time that the new eprom reads the data from the non volatile ram, it buildsthe above structures and inserts a code to understand that the new structures hasbeen built.In this way every time, after the first time, the machine is started up, thechecksums are recalculated, compared with the recorded one and if there is amismatch an alarm is generated related to the wrong structure.If a SECONDARY NOT CALIBRATED is recognized the alarm “NOTCALIBRATED” will appear on the first column: the machine works with datarelated to the secondary structure lost.It possible to reset the alarm condition by selecting the language.If a PRIMARY NOT CALIBRATION is recognized the alarm “NOTCALIBRATED” will appear on all the columns except the first: the softwareinhibits the rectifier, keeps the battery contactor open, the inverter off and the loadon reserve.For service purposes it is possible to start the machine by setting the SW 1.8 ON(TEST MODE): in this way the rectifier will start, the battery contactor will closeand the inverter will accept the start.As the rating is lost, the machine will display 10 kVA, the overload calculation andload percentage will be disabled.If the message “NOT CALIBRATED” appears on all the column it means that it isthe first time this eprom is used and the old data structure is not correct: themachine works in PRIMARY NOT CALIBRATED condition.



5b.9 RECTIFIER STARTUP CONTROL

A Vdc control test has been implemented to checks the voltage rising during therectifier start up.The test purpose is to check the rectifier feedback before closing the batterycontactor and enabling the inverter start.Before the test starts, the software waits for the following alarm conditions relatedto the rectifier to be OFF:

primary supply failprimary phase failrectifier inhibitedrectifier blockedepo request

The test checks the dc voltage reaches the 50% of nominal voltage by 10 sec. and itreaches the 90% of nominal voltage after 10 sec. the 50% threshold exceeding.While the voltage is rising and before the 90% threshold exceeding the messageVERIFY DC FEEDBACK appears on the RECTIFIER\BATT column.If the voltage rising is not in compliance with the test, the rectifier is shutdown, thebattery contactor open and the message “DC FEEDBACK FAULT” appears in theRECTIFIER\BATT ALARM column.

It is possible to restart the rectifier by pressing the and arrow for 2seconds: in this way the above test will be executed again before the batterycontactor closes and the inverter start is enabled.The battery contactor closure is executed when the Vdc reaches theRECTIFIER_90_PERCENT_TRIP (see section 5b.15 for values).



5b.10 RAU and AS400 outputs

There are five outputs which are used to drive the RAU and AS400 interfaces,these are:– System normal output: This is set when there are no active alarms.– Load on Reserve Alarm Output: This is set according to the signal read at load

on reserve input.– Primary Supply Fail Alarm Output: This is set if either the primary supply fail

input or primary phase fail input is active.– Shutdown imminent Alarm Output: This output is set when the shutdown

imminent alarm is active.– Inverter Fail Alarm Output: This is set if any of the following conditions is

active:Out of sync alarm,Over temperature alarm,Inverter fail input,Inverter voltage high,Inverter voltage low,Overload with load in inverter.

Each output has a delay of 10 seconds before it goes active following its respectivealarm being set. The outputs will go off as soon as the alarm clears.This is to prevent transients from unnecessarily alerting the user.

5b.11 POWER HISTORY

The POWER HISTORY function continuously records all information on alarmsand measurements in a circular buffer.The buffer holds all of the alarms and measurements which are accessible throughthe display.If a fault occurs which causes an inverter block, the power history functioncontinues recording information for a further one second and then freezes.At this point, all alarms and measurements are saved from up to 10 seconds beforethe inverter block to one second after it in 0.1 second steps.



5b.11.1 Display Power History

To display the power history information when it has been made available due toan inverter block, it is necessary to move across the columns of information using

the key until the power history entry message is displayed:

POWER HISTORY

DOWN TO ACCESSThis message indicates that information is available and would not otherwise bedisplayed.

Pressing the key at this point moves into the power history information.When power history information is displayed, the arrow keys are re–defined.

The and move backwards and forwards through time in 0.1 second steps.This takes it possible to determine the exact moment in which an alarm becameactive with respect to another alarm or measurement change, so the actualsequence of events leading up to the inverter block can be examined.

The key moves from one alarm to the next.Only alarms which were active at some time during the eleven second historyperiod will be displayed.This makes it easier to locate a particular alarm without the need to step through along list of alarms which do not apply.When the power history information is first accessed, the display shows the firstalarm which was active and its condition at time = 0.0 seconds, the instant at whichthe block occurred.– The top line shows the time in seconds relative to the moment the block

occurred– The bottom line of the display shows the alarm message– The top line shows on the right hand side, whether the alarm was on or off at this

moment in time.

Pressing the key moves through each of the active alarms.After the last alarm the option is given to exit from the power history information

by pressing the key:

POWER HISTORY

UP TO EXIT

Pressing returns to the history entry message and then moves on throughthe columns of information as described in Section 2.

Pressing the key when the exit message is displayed does not exit from thepower history but moves on to display the measurements.


Measurements are displayed on the bottom line of the LCD.The top line shows the Section of the UPS to which the readings refer and time,relative to the moment the block occurred, at which the readings were taken.Pressing the RIGHT key now moves through the measurements and then back tothe first alarm.

5b.11.2 Manual Power History Request

A power history block may be manually requested at any time by pressing the

and keys simultaneously.From this moment in time, information is recorded up to 10 seconds before andone second after in 0.1 second steps.When all information has been saved, the display will automatically change toshow the first activated alarm and its condition at the moment of the request (time= 0.0 seconds).If the power history had already been blocked before the manual request wasmade, power history information would still be displayed as described.However, the information displayed it that which was captured when the blockoccurred, and not when the manual request was made.

5b.11.3 Power History Restart

The power history function will automatically start to collect new information ifthe inverter is running and the power history data is not being displayed.Once new information has started to be collected, all old information is lost. Thusif the inverter is restarted following a block condition before the information hasbeen reviewed, it will not be possible to access this information which is now lost.If, however, the inverter should be blocked again, then information will becaptured about this new block.This information will remain available until the inverter is again restarted.If the information has been manually requested, and no inverter block hasoccurred, this information will be lost as soon as the exit power history option isselected.



5b.12 Battery autonomy

This is the calculation of the remaining time before inverter stop due to DCVOLTAGE LOW.Battery autonomy and discharge time are only displayed when the battery isdischarging.When it is displayed, it becomes the top row of the first column of information andhence will be displayed automatically if no arrow key has been pressed in the lastfive minutes.The top line of the LCD shows the UPS rating while the bottom line shows theautonomy time remaining and the discharge time already passed in minutes.The discharge time will not start counting unless the inverter is running, but oncestarted will continue to count until the end of discharge is reached even if theinverter stops running before this.The autonomy is initially shown as in calculation although the software is not ableto calculate the autonomy during the initial part of the discharge curve.When the battery voltage has fallen below 1.98 volts per cell and a further 30seconds have passed, the software makes the first attempt at calculating thebattery autonomy, and the result is displayed.The calculation is based on battery voltage and the change in battery voltage sincethe last calculation.– If the fall in battery voltage since the last calculation is less than 17mV/Cell

then no calculation is made.If it does not fall by this amount within one minute then a new calculation isforced each minute, until this voltage gap has passed,

– If the battery voltage rises slightly between readings, no new calculation ismade.If this rise is greater than 5mV/Cell, the display shows AUTONOMY INCALCULATION and the software then waits for the voltage to start fallingagain.



5b.13 RS232 PORT

The RS232 port is handled by software. Its function depends on the setting ofdisplay board DIL switches SW2.1 and SW3.5.With these switches is possible select the followings options:

SW 2.1 SW 3.5 Option installedOFF OFF Test terminalON OFF EasyOFF ON Life

To have more details related to each option and to other switches on the displayboard make, reference to section 5b.16 and to user or installation manuals of Easyor Life.

5b.14 INVERTER VOLTAGE CONTROL

The microprocessor does not control with feedback loop the inverter voltage but itgives only an open loop offset to regulate the voltage level related to the outputvalue selected by the SW 1.1 and SW 1.2.



5b.15 EDP70 Display Board trip settings

The following is a list of voltage and current trip points which are controlled by thedisplay control board.

INVERTER VOLTAGE 380V 400V 415V

Inverter Voltage LOW 342.0V 358.0V 374.0VInverter Voltage HIGH 419.0V 438.0V 457.2VHysterisis for Inverter Low Trip 2.0V 2.0V 2.0V

DC VOLTAGE 144 cells 198 cells 240 cells

Low DC Trip 237.6V 326.7V 396.0VLow DC Trip Reset 309.6V 425.7V 516.0VVDC 217 Battery Discharging 302.4V 415.8V 504.0VVDC 215 Battery Discharging 310.5V 425.7V 516.9VVDC 210 Battery Discharging 312.5V 429.7V 520.8VRectifier 50 % trip 163.4V 224.7V 272.4VRectifier 90 % trip 294.0V 404.6V 490.3VVDC Shutdown Imminent * 252.0V 346.5V 420.0VMinimum Battery Test Voltage 273.6V 376.2V 456.0VHigh DC Trip 345.6V 475.2V 576.0VHigh DC Trip Reset 340.0V 467.5V 566.7VLoss dc reaction trip 230.4V 316.8V 384.0V* = Shutdown imminent is reset when battery is no longer discharging (i.e. >

VDC 217 Battery Discharging).




Overload TripCurrent 15.9A 23.9A 31.8A 47.7A 63.6A 79.8A 95.7AMax Peak LoadCurrent * 37.9A 56.8A 75.8A 113.6A 151.5A 189.9A 227.9AMax RMS LoadCurrent * 15.2A 22.7A 30.3A 45.5A 60.6A 76.0A 91.2A


Overload TripCurrent 15.2A 22.8A 30.4A 45.7A 60.9A 75.8A 90.9AMax Peak LoadCurrent * 36.2A 54.3A 72.5A 108.7A 144.9A 180.4A 216.5AMax RMS LoadCurrent * 14.5A 21.7A 29.0A 43.5A 58.0A 72.2A 86.6A


Overload TripCurrent 14.6A 21.9A 29.2A 43.8A 58.3A 73.0A 87.6AMax Peak LoadCurrent* 34.7A 52.1A 69.4A 104.2A 138.9A 173.9A 209AMax RMS LoadCurrent * 13.9A 20.8A 27.8A 41.7A 55.5A 69.6A 83.5A* = Used for percentage load calculation



5b.16 DIL Switch definitions

OUTPUT VOLTAGE 400V TEST 380V 400V 415V

SW1.1 OFF ON OFF ONSW1.2 OFF OFF ON ON

DC VOLTAGE 144 cells 198 cells 240 cells

SW1.3 ON OFF ONSW3.2 OFF ON ON

EDP50UPS RATING 6kVA 7.5kVA 8kVA 10kVA 15kVA 20kVA

SW1.4 OFF ON OFF ON OFF ONSW1.5 OFF OFF ON ON OFF OFFSW1.6 OFF OFF OFF OFF ON ONAny non valid combination will result in 10kVA but should not be used.

EDP70UPS RATING 10kVA 15kVA 20kVA 30kVA 40kVA 50kVA 60kVA

SW1.4 OFF ON OFF ON OFF ON OFFSW1.5 OFF OFF ON ON OFF OFF ONSW1.6 OFF OFF OFF OFF ON ON ONAny non valid combination will result in 10kVA but should not be used.

Auto voltage control

SW1.7 ON = auto control voltage onOFF = no auto control voltage

System test Mode

SW1.8 ON = System test ModeOFF = normal UPS operation

Serial Port Functions: Test terminal LIFE EASY JBUS

SW2.1 OFF OFF ON ONSW3.5 OFF ON OFF ON



EASY + Test term. + JBUSSerial Port Baud Rate 1200 4800 9600 19200


LIFE Serial Port Baud Rate 300 1200 1200 1200


UPS Identifier for EASY–1000 Software

SW2.7 SW2.6 SW2.5 SW2.4UPS No 1 OFF OFF OFF OFF (std setting)UPS No 2 OFF OFF OFF ONUPS No 3 OFF OFF ON OFFUPS No 4 OFF OFF ON ONUPS No 5 OFF ON OFF OFFUPS No 6 OFF ON OFF ONUPS No 7 OFF ON ON OFFUPS No 8 OFF ON ON ONUPS No 9 ON OFF OFF OFFUPS No 10 ON OFF OFF ONUPS No 11 ON OFF ON OFFUPS No 12 ON OFF ON ONUPS No 13 ON ON OFF OFFUPS No 14 ON ON OFF ONUPS No 15 ON ON ON OFFUPS No 16 ON ON ON ONWhen only 1 UPS is connected to a PC, Identifier No 1 MUST be used (allswitches OFF)

SW2.8 – NOT USED



UPS TYPE

SW3.1 OFF = EDP50ON = EDP70

EDP RETROFIT (EDP50 only)

SW3.3 OFF = normal settingON = early EDP50 (without Idc measurement)

EDP TYPE

SW3.4 OFF = EDP EURON = EDP USA

SW3.6 OFF = 50 HzON = 60 Hz

LIFE MANUAL CALL

Press keys UP + BUZZER MUTE for 2 seconds

UPS IN SERVICE

Press keys DOWN + BUZZER MUTE for 2 seconds

SETUP LIFE

Press keys RIGHT + BUZZER MUTE for 2 seconds

START RECTIFIERorAUTONOMY TEST

Press keys UP + RIGHT for 2 seconds

BATTERY TEST

Press keys UP + DOWN for 2 seconds

POWER HISTORY

Press keys DOWN + RIGHT for 2 seconds


Para 6.1 = TROUBLE SHOOTING ( FSB < 30 )

6 TROUBLE SHOOTING

6.1 TROUBLE SHOOTING (for UPS having FSB status < 30)

The following is a guide to troubleshooting, starting from ALARM MESSAGESappearing on UPS display. As some messages can be generated by othermessages, in this case the action is referred to the originating message(s).ALARM MESSAGES are organized on display in pages and are here presentedper page.

GENERAL INSTRUCTIONS

RISK OF ELECTRICAL SHOCK AND DAMAGE TO UPS AND LOAD

Instruction hereinafter contained require to be performed by trained personnel,being fully aware of the more detailed information contained in the TechnicalManual of which this is a section.UPSs are subject to continuous improvement, therefore before to proceed withfollowing troubleshooting check that any upgrade FSB has been applied to theunit.This troubleshooting does not recall all the time that the fault can be due to badconnections. Check all connections before entering into a deeper investigation.In many cases the replacement of boards is suggested as a tentative, therefore it issuggested that, if replacement does not solve the problem, the old board isreinstalled before proceeding to next step in order to save spare boards.Replacement of most of the boards must be done following the procedureincluded with the spare board and not recalled here.



BATTERY/RECTIFIER

PRIMARY SUPPLY FAIL

Is mains voltage present and within tolerance (230 V +– 20%) at UPS terminals U, V,W versus N ?

NO–> Look for reasonYES–> Is mains voltage present downstream S1 (wires 5, 6, 7, versus 8) ?

NO–> Check integrity of S1YES–> Are fuses F1M, F2M, F3M on board SP10 blown ?

YES–> Replace fuses.(If they blow again, replace SP10)NO–> Replace board SP5. Solved ?

NO–> Replace board SP1.


Have the upstream connections to UPS been modified ?YES–> Correct the connections to UPS terminalsNO–> Is mains voltage present and within tolerance (230 V +– 20%) at UPS

terminals U, V, W versus N ?NO–> Look for reasonYES–> Are fuses F1M, F2M, F3M on board SP10 blown ?





BATTERY FAULT

Is contactor RLA closed ?NO–> Check for integrity of RLA, eventually replace SP1 (board driving RLA)YES–> Warning !! (During following steps the load will be supplied from mains,

therefore take needed precautions.)Go into Manual Maintenance Bypass mode following relatedinstructions. With a DC DVM read battery voltage at terminals 1M,pins (+VE, –VE in 10, 15, 20 kVA) (+,– in 30, 40, 50, 60 kVA). Is ithigher than 240 V for 1st case and higher than 330 V for 2nd case ?NO–> Check for integrity of battery fuse and of all connections

between UPS and batteries, and between all battery blocksYES–> Return to Normal mode following related instruction. Wait for

battery voltage to stabilize at float level. With a DC DVMread voltage across each battery block. It must be withinfollowing tolerance:Block voltage = (Total battery voltage /number of blocks )+– 3%Battery blocks outside above tolerance should beconsidered as faulty and replaced with same type and samemanufacturer blocks. If the battery has been in operationlonger than 50% of expected life, consideration should begiven to the possibility to replace the complete battery:contact supplier. For more details see IN FIELD BATTERYREPLACEMENT PROCEDURE.

BATT. CONTACTOR OPEN

Is DC VOLTAGE HIGH present ?YES–> See related instructionNO–> Is DC VOLTAGE LOW present ?

YES–> See related instructionNO–> Is BYPASS SWITCH CLOSED (Inverter page) present ?

YES–> See related instructionNO–> Is green led DL1 on SP11 lit ?

YES–> Replace SP1NO–> Replace SP11



BATTERY DISCHARGING

Is PRIMARY SUPPLY FAIL present ?YES–> See related instructionNO–> Replace SP3. Solved ?

NO–> With a DC DVM read battery voltage and compare with readingon display. If display outside +– 1% tolerance, adjust thereading by turning P8 on SP1. Solved ?NO–> Replace SP1

SHUTDOWN IMMINENT

This alarm appears near the end of battery discharge, to warn user before Inverterswitching off. See BATTERY DISCHARGING instructions.

DC VOLTAGE HIGH

Replace SP3. Solved ?NO–> With a DC DVM read battery voltage and compare with reading on display.

If display outside +– 1% tolerance, adjust the reading by turning P8 onSP1. Solved ?NO–> Replace SP1

DC VOLTAGE LOW

Is PRIMARY SUPPLY FAIL present ?YES–> See related instructionNO–> See DC VOLTAGE HIGH instruction

INPUT BREAKER OPEN

Is S1 open ?YES–> Understand the reason and close itNO–> Check for integrity of auxiliary contact of S1 and its connections

BATTERY CHARGER INHIBITED

This command is given from outside the UPS. Check connections and externalcontacts connected to terminal 1M, pins 3–4 (open contact = inhibit)



INVERTER

EPO

This command is given from outside the UPS. Is an EPO (Emergency Power Off)command present ?

YES–> Understand the reason and switch off the external commandNO–> Check for external contact(s) and connections to terminal 1M, pins 1–2

(open = EPO). Solved ?NO–> Replace SP1

OUT OF SYNC

Occasional OUT OF SYNC are normal in case of disturbed mains or supply fromgenerator. If the alarm is persisting: is RESERVE FREQ FAULT (load and reservepage) present ?

YES–> See related instructionNO–> Replace SP2

OVERTEMPERATURE

This alarm causes the inverter to stop and the load to be transferred to reserve: thiscondition remains locked until it is reset pushing Inverter START.Push Inverter START: does it start?

YES–> Check for reasons of alarm: ambient temperature too high, fans not wellrunning, air inlets and outlets obstructed

NO–> Check on SP2, connector 5PL, pins 1–2: is DC voltage zero ?YES–> Replace SP2NO–> Is excessive temperature still present on heatsinks and inside

UPS ?YES–> Wait for cooling and check for reasons: ambient

temperature too high, fans not well running, airinlets and outlets obstructed

NO–> Check for integrity of thermoswitches and theirconnections


Is S3 closed ?YES–> Understand reason and eventually return to Normal mode following

related instructionNO–> Check for integrity of auxiliary contact of S3 and its connections

INVERTER NOT RUNNING

Inverter STOP has been operated. Understand reason and operate START.



INVERTER INHIBITED

This alarm is generated by following:BYPASS SWITCH CLOSEDDC VOLTAGE HIGHDC VOLTAGE LOWSTOP DUE TO OVERLOADEPOCheck for presence of any of above alarms and see related instructions.

INVERTER BLOCKED

This alarm is generated by following:DESATURATIONOVERTEMPERATUREDC VOLTAGE HIGHDC VOLTAGE LOWINVERTER FREQ. FAULTSTATIC SWITCH FAULT (in Inverter page)Check for presence of any of above alarms and see related instructions.

INVERTER VOLTS HIGH

Operate Inverter START and the alarm is reset. Does it come back again after a while?YES–> Note: this alarm causes the Inverter to be stopped, therefore following

checks must be performed operating each time START in order to starttemporarily the Inverter.With a DC DVM measure on SP1 the voltages at TP9, TP7, TP4 versus0VA1 (anode of diodes D31,33,37). Operating START, are all 3voltages overcoming 1 Volt before the alarm becomes active ?YES–> Replace SP2NO–> Are F1I, F2I, F3I on SP10 blown ?

YES–> Replace fuses. If they blow again, replace SP10NO–> Replace SP1

INVERTER VOLTS LOW

Operate Inverter START and the alarm is reset. Does it come back again after a while?YES–> Replace SP2

OVERLOAD

Check for load level and eventually reduce it or balance it better between phases.Note: when this alarm is persistent, it causes STOP DUE TO OVERLOAD and theload is transferred to reserve.



STOP DUE TO OVERLOAD

See OVERLOAD instructions

CURRENT LIMIT

Is OVERLOAD present ?YES–> See related instructionNO–> The alarm is due to a load drawing highly distorted current (with high Pk.F)

from one or more phases. Check on display (Load Measures page) ifone or more phases are loaded at high % with Pk.F higher than 3 andredistribute the loads to obtain lower and more balanced Pk.F on the 3phases.

STATIC SWITCH FAULT

Check for integrity of Inverter Static Switch SCRs: with Inverter in STOP and loadon reserve, using an AC DVM read the voltage at wires 19, 20, 21, versus 42 (neutral).If you read more than 70 Volts the SCRs of that phase are faulty. Replace with sametype and same manufacturer.

SYSTEM TEST MODE

Switch 1–8 on SP5 is in ON position. This is a test condition that excludes followingalarms:OVERLOADDC VOLTAGE HIGHDC VOLTAGE LOWIs switch 1–8 in ON position ?

YES–> Understand reason and move it to OFFNO–> Replace SP5



DESATURATION

Operate Inverter START. Does it start ?YES–> Check for integrity of Static Switches and level of load for each phase.

Investigate if any heavy step load can occur.NO–> With Inverter in OFF, read with a DC DVM the voltage across the power

transistors (Emitter to Collector). It must be around 50% of total DCBUS voltage. Is this correct ?NO–> Replace power transistor showing low voltage, replace

transistor on same branch (therefore showing high voltage),replace Driver board ( SP8 A or B or C) of same branch.

YES–> Check for correct supply voltages on Driver boards (+7.5,–11.5 Volt). Are these correct ?NO–> If all Driver boards show wrong supply voltage, then

replace SP11, otherwise replace the Driverboard(s) showing the wrong supply voltage

YES–> Replace SP2. Solved ?NO–> Replace one by one the Driver boards



LOAD AND RESERVE

LOAD ON RESERVE

It is a temporary alarm, showing that load has been transferred to reserve due to anoverload. Within 10 seconds load is transferred again to Inverter. If this is not truelook for other alarms present and follow related instruction.

LOAD NOT SUPPLIED

Load has been switched off due to other alarms. Check for any of them present andfollow related instruction.

RESERVE FAULT

Are any of following alarms present ?RESERVE FREQ. FAULTRESERVE VOLTS HIGHRESERVE VOLTS LOW

YES–> See related instructionNO–> Replace SP4. Solved ?

NO–> Replace SP5

RESERVE FREQ. FAULT

Frequency of Reserve mains is out of accepted tolerance. This can depend on mainsdisturbances or can happen when supplied from generator.Can the load accept wider frequency tolerance than that currently set on SP4 (usermust be involved in such decision) ?

NO–> Reserve supply must be improved or a Reserve UPS can be suggestedYES–> Select new frequency tolerance on SP4 (SW 1–6, SW 1–7)

RESERVE VOLTS HIGH or RESERVE VOLTS LOW

Voltage of Reserve mains is out of accepted tolerance. This can depend on weak orpoorly regulated supply network.Can the load accept wider tolerance than that currently set on SP4 (user must beinvolved in such decision) ?

NO–> Contact the responsible of local mains network and the Electricity Supplierto identify corrective actions

YES–> Select new voltage tolerance on SP4 (SW 2–1, SW 2–2)



STATIC SWITCH FAULT

Is the load on reserve ?YES–> Check for integrity of SCRs of Inverter Static SwitchNO–> Check for integrity of SCRs of Reserve Static Switch. Solved ?

NO–> Replace SP4

OUTPUT BREAKER OPEN

Is S4 open ?YES–> Understand reason and close itNO–> Check for integrity of its auxiliary contact and connections

RESERVE BREAKER OPEN (not always present being an option)

Is S2 open ?YES–> Understand reason and close itNO–> Check for integrity of its auxiliary contact and connections


Have the upstream connections to UPS been modified ?YES–> Correct the connections to UPS terminalsNO–> Is mains voltage present and within tolerance (230 V +– 20%) at UPS

terminals U, V, W (or U1, V1, W1 in case of separate reserve inputoption) versus N ?NO–> Look for reasonYES–> Are fuses F1R, F2R, F3R on board SP10 blown ?




Para 6.2 = TROUBLE SHOOTING ( FSB > = 30 )

6.2 TROUBLE SHOOTING (for UPS having FSB status > = 30)

The following is a guide to troubleshooting, starting from ALARM MESSAGESappearing on UPS display.The target of this document is to describe how each alarm of this eprom isgenerated.The alarm list is divided in the same 4 groups that are present on the machinedisplay:

MAINS ALARMSRECTIFIER / BATTERY ALARMSINVERTER ALARMSLOAD / RESERVE ALARMS

To help the users in the alarms recognizing, each item is reported in all the 5languages present on the UPS.Legend:.. input with input are identified the display board digital inputs.

Refer to DISPLAY CONTROL BOARD electrical drawing... output with output are identified the display board digital outputs.

Refer to DISPLAY CONTROL BOARD electrical drawing... condition with condition are identified the machine status that could be a

combination of digital and analog input.dc voltage, battery current, inverter voltage ph1, inverter voltage ph2,

inverter voltage ph3, reserve voltage, load current ph1, loadcurrent ph2, load current ph3: all these are display board analoginputs.

AND is a boolean operator. The expression is true if both the operands thatare before and after the operator are true.

OR is a boolean operator. The expression is true if at least one operator istrue.

not is a logical operator the invert the operand value.(PLXX.YY ) this string identify connector (XX) and the pin (YY) related to the

digital input or output



MAIN ALARMS

1. SYSTEM TEST MODE

SWITCH POSIT. TEST

TESTBETRIEB

SISTEMA IN VERIFICA

TEST DEL SISTEMA

The machine is in test mode if the SW 1.8 of the display board is set in ON.

2. TESTING BATTERY

BATTERIE EN TEST

BATTERIETEST

PROVA DELLA BATTERIA

PRUEBA DE BATERIAS

This message is active while the UPS is testing the battery.

3. TESTING AUTONOMY

AUTONOMIA EN TEST

AUTONOMIETEST

TEST AUTONOMIA

PRUEBA DE AUTONOMIA

This message is active while a autonomy test is executing.

4. E.P.O. ACTIVE

ARRET URGENCE ACTIVE

NOTAUS AKTIV

E.P.O. ATTIVO

E.P.O. ACTIVO

This alarm is generated by the following condition:(inverter reset input) (PL8.26) AND(not inverter reset output) (PL8.26) AND(not bypass breaker closed input) (PL8.17) AND(not output breaker open input) (PL8.14)



5. NOT CALIBRATED

NON ETALONNE

NICHT JUSTIERT

NON CALIBRATO

NO CALIBRADO

This alarm is present in the main page means a secondary not calibration.

6. SYSTEM IN ALARM

FONCTIONNEM. ANORMAL

STOERBETRIEB

SISTEMA IN ALLARME

SISTEMA EN ALARMA

This alarm is active when at least one alarm is present in the machine.

7. MODEM SETUP FAILED

DEFAULT INIT. MODEM

MODEM SETUP FAISCH

PROG. MODEM FALLITA

FALLO CONFIG. MODEM

This message appears only when the Life option is enabled and indicates that the UPSis unable to programme the Modem.

8. LIFE SETTINGS LOST

CONFIG. LIFE PERDUE

LIFE SETUP FEHLT

PERDITA PARAM. LIFE

PERDIDA CONFIG.LIFE

This alarm is displayed at UPS power up if Life is selected as serial option; it indicatesthat Life configuration has been reset to default values and needs to be set up again.Refer to Life User’s Manual for further details.



9. LIFE DATA LOST

DONNEES LIFE PERDUES

LIFE DATEN N. VERF.

PERDITA DATI LIFE

PERDIDA DATOS LIFE

This alarm is displayed at UPS power up if Life is selected as serial option; it indicatesthat Life data has been deleted from the UPS memory and that data monitoring hasconfiguration has been interrupted. Refer to Life User’s Manual for further details.

RECTIFIER AND BATTERY ALARMS

1. NOT CALIBRATED

NON ETALONNE

NICHT JUSTIERT

NON CALIBRATO

NO CALIBRADO

This alarm is present in the this page means a primary not calibration.

2. DC FEEDBACK FAULT

PERTE DU RETOUR DC

DC REGS. FEHLT

PERDITA CONTR. PONTE

FALLO REDLIMEN. REC

This alarm is generated if, at the machine start up, the dc voltage does not reach the50% of nominal voltage by 10 sec. or if it does not reach the 90% of nominal voltageafter 10 sec. the 50% threshold exceeding.The alarm could be generated in the same way when a rectifier start up is executed byhand with the arrow keys.

Vdc 50% nominal voltage = 81.7 V (72 el) 163.4 V (144 el)Vdc 90% nominal voltage = 147.0 V (72 el) 294.0 V (144 el)

The same alarm could be generated after the start up if:(dc voltage < loss dc reaction trip voltage) AND(batt charging condition) AND(not system test condition) AND(not primary mains fault condition) AND(not epo request condition) AND(not rectifier shutdown output) (PL8.26)



where:loss dc reaction trip voltage (230.4 V, 144 el) (316.8 V, 198 el) (384.0 V, 240 el)batt charging condition is true if:

(battery current > i batt charging) AND(not battery contactor open input) (PL8.18)

where:i batt charging = 1 A

system test condition see point 1 of MAIN ALARMSprimary mains fault condition see point 4epo request condition see point 4 of MAIN ALARMS

3. VERIFY DC FEEDBACK

VERIF. TENSION CC

UEBERPRUEFUNG DC

VERIF. CONTR. PONTE

VERIF.REDLIM.REC.

This message is active at the start up while the software is checking the dc voltage.It will be reset when the dc voltage exceeds the 90% of nominal voltage threshold.

4. PRIMARY SUPPLY FAIL

ABSEN. RES. PRINCIP.

NETZAUSFALL

MANCANZA RETE

FALLO DE RED

This alarm is generated by the following input signals combination:(pri supply fail input) (PL8.8) OR((pri phase fail input) (PL8.9) AND(not input breaker just closed))

where:input breaker just closed true since the input breaker is closed for 500 msec.

5. PHASE SEQUENCE ERROR

DEFAUT ORDRE PHASES

FALSCHES DREHFELD

SENSO CICLICO ERRATO

ERROR SECUENCIA FASE

This alarm is generated by the following input signal:pri phase fail input (PL8.9)



6. BATTERY FAULT

DEFAUT BATTERIE

BATTERIE DEFEKT

GUASTO BATTERIA

FALLO DE BATERIAS

This alarm is generated if during the battery test:dc voltage < minimum battery test volt. (273.6 V, 144 el)

(376.2 V, 198 el)(456.0 V, 240 el)

7. PCB SUPPLY FAULT

DEFAUT ALIM.CARTES

VERSORGUNGSFEHLER PL

GUASTO ALIM. PCB

FALLO ALIM.CONT.

This alarm is active if the following equation is true:(inverter off condition) AND(peak limit input) (PL8.3) AND(current limit input) (PL8.2) AND((batt charging condition) OR(not dc voltage under 90 condition)) AND(not rectifier shutdown output) (PL8.26)

where:inverter off condition is true when the inverter has been stop by hand or when

inhibited or blocked or at the machine start up.batt charging condition is true if:



not dc voltage under 90 condition means that the dc voltage is greater than the 90%of nominal voltage.



8. BATT CONTACTOR OPEN

CONTACT.BATT. OUVERT

BATTERIEKONT. OFFEN

TELER. BATT. APERTO

CONT. BAT. ABIERTO

This message is generated by the digital input:batt contactor open input (PL8.18)

9. BATTERY DISCHARGING

BATTERIE EN DECHARGE

BATTERIEENTLADUNG

BATTERIA IN SCARICA

BATERIA EN DESCARGA

This message is generated by the following condition:(not batt charging condition) AND(dc voltage < vdc 215 battery discharging)

where:vdc 215 battery discharging (309.6 V, 144 el) (425.7 V, 198 el) (516.0 V, 240 el)batt charging condition is true if:



10. SHUTDOWN IMMINENT

COUPURE IMMINENTE

WARNUNG VERSORG.ENDE

ARRESTO IMMINENTE

PROXIMA DESCONEXION

This alarm is generated if the dc voltage is less the shutdown imminent trip voltage.This is a software regulated threshold that increases with the battery dischargingtime. It starts from 1.75 V/el at the battery discharging beginning until to 1.9 V/elafter 10 hours.



11. DC VOLTAGE HIGH

SURTENSION DC

DC–UEBERSPANNUNG

TENS. CONTINUA ALTA

TENS. BATERIA ALTA

This alarm is generated if:dc voltage > high dc trip voltage (345.6 V, 144 el)

(475.2 V, 198 el)(576.0 V, 240 el)

12. DC VOLTAGE LOW

SOUS–TENSION DC

DC–UNTERSPANNUNG

TENS. CONTINUA BASSA

TENS. BATERIA BAJA

This alarm is generated if the dc voltage is less the low dc trip voltage.This is a software regulated threshold that increases with the battery dischargingtime.It starts from 1.65 V/el at the battery discharging beginning until to 1.8 V/el after 10hours.

13. INPUT SWITCH OPEN

INTER. ENTREE OUVERT

HAUPT–SCHALTER OFFEN

SEZ. INGRESSO APERTO

INT. ENTRADA ABIERTO

This alarm is generated if is active the digital input:input breaker open input (PL8.13)

14. HARMONIC FILTER OPEN

FILTRE HARMONIQ. OFF

FILTER NICHT AKTIV

FILTRO ARMONICA OFF

FILTRO ARMONICOS OFF

This alarm is generated if is active the digital input:harmonic filter open input (PL8.16)



15. RECTIFIER ALARM

REDRESSEUR EN ALARME

GLEICHR.STOERUNG

RADDRIZZ. IN ALLARME

ALARMAS RECTIFICADOR

This alarm is generated by the following condition:(batt discharging condition) AND(dc voltage < vdc 210 battery discharging) AND(not primary mains fault condition) AND(not rectifier shutdown output) (PL8.28) AND(not recharge inhibit input) (PL23.10) AND(not batt contactor open input) (PL8.18) AND(not inv overload condition)

where:vdc 210 battery discharging (302.4 V, 144 el) (415.8 V, 198 el) (504.0 V, 240 el)batt discharging condition see point 9primary mains fault condition see point 4inv overload condition =

overload_condition see point 15 ANDload on inv input (PL8.4)

The alarm is reset if:(not batt discharging condition) OR(dc voltage >= vdc 215 battery discharging) OR(primary mains fault condition) OR(rectifier shutdown output) OR(recharge inhibit input) (PL23.10) OR(battery contactor open input) (PL8.18) OR(inv overload condition)

wherevdc 215 battery discharging (310.5 V, 144 el) (425.7 V, 198 el) (516.0 V, 240 el)inv overload condition =

overload_condition see point 15 ANDload on inv input (PL8.4)



16. RECTIFIER INHIBITED

REDRESSEUR INHIBE

GLEICHR. GESPERRT

RADDRIZZ. INIBITO

RECT.INHIBIDO

This alarm is generated by the following condition:(dc high condition) OR(epo request condition) OR(not calib and not sys test )

where:epo request condition see point 4 of MAIN ALARMSnot calib and not sys test means that the machine is primary not calibrated but not

in test mode.

17. RECTIFIER BLOCKED

REDRESSEUR BLOQUE

GLEICHR. BLOCKIERT

RADDRIZZ. BLOCCATO

RECT. BLOQUEADO

This alarm is generated by the following condition:(dc feedback fault condition) AND(not rectifier start request)

where:dc feedback fault condition see point 2rectifier start request set if a rectifier start by hand is requested

18. BATT. CHARGE INHIBIT

CHARGE BATT. INHIBEE

BATT.LADUNG GESTOPPT

CARICA BATT. INIBITA

CARGA BAT. INHIBIDA

This alarm is generated by the digital input:recharge inhibit input (PL23.10)



INVERTER ALARMS

1. NOT CALIBRATED

NON ETALONNE

NICHT JUSTIERT

NON CALIBRATO

NO CALIBRADO


2. PCB SUPPLY FAULT

DEFAUT ALIM.CARTES


GUASTO ALIM. PCB

FALLO ALIM.CONT.

This alarm is active if the following equation is true:(inverter off condition) AND(peak limit input) (PL8.3) AND(current limit input) (PL8.2) AND((batt charging condition) OR(not dc voltage under 90 condition)) AND(not rectifier shutdown output) (PL8.26)


inhibited or blocked or at the machine start up.batt charging condition is true if:



not dc voltage under 90 condition means that the dc voltage is greater than the 90%of nominal voltage.



3. OUT OF SYNC

NON SYNCHRONISE

NICHT SYNCHRON

MANCANZA SINCRONISMO

FALTA DE SINCRONISMO

This alarm is generated by the following equation:(out of sync input) (PL8.7) AND(not inverter off condition) ANDnot (load on reserve condition AND overload condition) AND(not reserve fail condition)


inhibited or blocked or at the machine start up.load on reserve condition see point 2 of LOAD/RESERVE ALARMSoverload condition see point 15reserve fail condition see point 5 of LOAD/RESERVE ALARMS

4. DESATURATION

DESATURATION

ENTSATTIGUNG

DESATURAZIONE

DESATURACION

This alarm is generated by the following equation:(inverter fail input) (PL8.10) AND(not over temperature input) (PL8.15) AND(not open battery contactor request)

where:open battery contactor request means a software battery contactor opening



5. OVER TEMPERATURE

TEMPERAT. EXESSIVE

UEBERTEMPERATUR

SOVRATEMPERATURA

SOBRETEMPERATURA

This alarm is generated by the following equation:(over temperature input) (PL8.15) AND(not open battery contactor request)

where:open battery contactor request means a software battery contactor opening

6. BYPASS SWITCH CLOSED

COMMUT. SUR BYPASS

BYPASSSCHAL. GESCHL.

SEZ. BYPASS CHIUSO

INT. BYPASS CERRADO

This alarm is generated by the digital input:bypass breaker closed input (PL8.18)


COUPURE IMMINENTE


ARRESTO IMMINENTE

PROXIMA DESCONEXION

This alarm is generated if the dc voltage is less the shutdown imminent trip voltage.This is a software regulated threshold that increases with the battery dischargingtime. It starts from 1.75 V/el at the battery discharging beginning until to 1.9 V/elafter 10 hours.

8. DC VOLTAGE HIGH

SURTENSION DC

DC–UEBERSPANNUNG

TENS. CONTINUA ALTA

TENS. BATERIA ALTA

This alarm is generated if:dc voltage > high dc trip voltage (345.6 V, 144 el)

(475.2 V, 198 el)(576.0 V, 240 el)



9. DC VOLTAGE LOW

SOUS–TENSION DC

DC–UNTERSPANNUNG


TENS. BATERIA BAJA

This alarm is generated if the dc voltage is less the low dc trip voltage.This is a software regulated threshold that increases with the battery dischargingtime. It starts from 1.65 V/el at the battery discharging beginning until to 1.8 V/elafter 10 hours.

10. INVERTER NOT RUNNING

ONDULEUR ARRETE

WECHSELR. AUS

INVERTER SPENTO

INVERSOR PARADO

This alarm is generated by the following equation:(inverter off condition) AND(not wait inv freq condition) AND(not wait batt cont close condition)


inhibited or blocked or at the machine start up.wait inv freq condition see point 21wait batt cont close condition see point 22



11. INVERTER INHIBITED

ONDULEUR INHIBE

WECHSELR. GESPERRT

INVERTER INIBITO

INVERSOR INHIBIDO

This alarm is generated by the following equation:(epo request condition) OR(overload timeout condition AND not system test condition) OR(dc high condition) OR(dc feedback fault condition) OR(bypass output bkr closed condition) OR(dc low condition AND not system test condition)

where:epo request condition see poin 4 of MAIN ALARMSoverload timeout condition see point 16system test condition see point 1 of MAIN ALARMSdc high condition see point 8dc feedback fault condition see point 2 of RECTIFIER BATTERY ALARMSbypass output bkr closed cond =

(bypass breaker closed input) (PL8.17) AND(not output switch open input) (PL8.14)

dc low condition see point 9



12. INVERTER BLOCKED

ONDULEUR BLOQUE

WECHSELR. ANGEHALTEN

INVERTER BLOCCATO

INVERSOR BLOQUEADO

This alarm is generated by the following equation:(not calib and not sys test condition) OR(desaturation condition) OR(over temperature condition) OR(inv overvoltage condition AND not system test condition) OR(inv.st. switch fault condition) OR(inv frequency out range condition) OR(loss inv reaction condition)

where:not calib and not sys test condition means that the machine is primary not

calibrated but not in test mode.desaturation condition see point 4over temperature condition see point 5inv overvoltage condition see point 13system test condition see point 1 of MAIN ALARMSinv.st. switch fault condition see point 18inv frequency out range condition see point 19loss inv reaction condition see point 20



13. INVERTER VOLTS HIGH

SURTENSION ONDULEUR

WECHSELR. UEBERSPG.

TENS. INVERTER ALTA

TENS. INVERSOR ALTA

This alarm is generated by the following equation:((inverter voltage ph1 > high inverter trip voltage) OR(inverter voltage ph2 > high inverter trip voltage) OR(inverter voltage ph3 > high inverter trip voltage)) AND(not open battery contactor request)

where:high inverter trip voltage = 242 V for 220 V inverter output

253 V for 230 V inverter output264 V for 240 V inverter output

open battery contactor request means a software battery contactor opening



14. INVERTER VOLTS LOW

SOUS–TENSION ONDUL

WECHSELR. UNTERSP.

TENS. INVERTER BASSA

TENS. INVERSOR BAJA

This alarm is generated by the following equation:(inverter voltage low condition) AND(not loss inv reaction condition) AND(not inverter off condition) ANDnot (load on reserve condition AND overload condition)

where:inverter voltage low condition is true if:

((inverter voltage ph1 < low inverter trip voltage) OR(inverter voltage ph2 < low inverter trip voltage) OR(inverter voltage ph3 < low inverter trip voltage))

low inverter trip voltage = 198 V for 220 V inverter output207 V for 230 V inverter output216 V for 240 V inverter output

loss inv reaction condition see point 20inverter off condition is true when the inverter has been stop by hand or when

inhibited or blocked or at the machine start up.load on reserve condition see point 2 in LOAD RES ALARMSoverload condition see point 15

15. OVERLOAD

SURCHARGE

UEBERLAST

SOVRACCARICO

SOBRECARGA

This alarm is generated by the following equation:((load current ph1 > overload trip current) OR(load current ph2 > overload trip current) OR(load current ph3 > overload trip current)) AND(load on inv input) (PL8.4)

where:overload trip current 105% nominal current. See technical manual for other details



16. STOP DUE TO OVERLOAD

ARRET CAUSE SURCHAR.

STOP WEGEN UEBERLAST

STOP PER SOVRACCAR

PARO POR SOBRECARGA

This alarm is generated by a software algoritm when the overload condition durationreachs the maximum machine overload capacity.

17. CURRENT LIMIT

LIMITAT. DE COURANT

STROMBEGRENZUNG

LIMITE DI CORRENTE

LIMITE DE CORRIENTE

This alarm is generated by the digital input:current limit input (PL8.2)

18. INV.ST. SWITCH FAULT

DEFAUT CS ONDULEUR

INV ST.SW. FEHLER

COMM.STAT.INV.GUASTO

FALLO CONM. ESTATICO

This alarm is generated by the following equation:((inverter voltage ph1 > (nominal ac voltage / 3) OR(inverter voltage ph2 > (nominal ac voltage / 3) OR(inverter voltage ph3 > (nominal ac voltage / 3)) OR(not inverter just stopped) AND(not handling epo)

where:nominal ac voltage is 220 V or 230 V or 240 V.inverter just stopped this condition is true for 2 sec. after the inverter stop.handling epo this condition is true since an EPO is recognized until the inverter

control board supply is OFF



19. INV.FREQ.OUT RANG. 8%

DEF. FREQ. ONDUL. 8%

WECHS.FREQ.FALSCH 8%

FREQ.INV.FUORI TO. 8%

FALLO FREC.INVERS. 8%

This alarm is generated by the following equation:((inverter frequency < low inverter trip frequency) OR(inverter frequency > high inverter trip frequency)) AND(not inverter just run)

where:low inverter trip frequency nominal freq. – 8%high inverter trip frequency nominal freq. + 8%inverter just run this conditon is true since the inverter is start for 10 sec.

20. INV. FEEDBACK FAULT

PERTE DU RET. ONDUL

WECHSELR.REGS. FEHLT

PERDITA CONTR. INV.

FALLO REDLIMEN. INV

This alarm is generated by the following equation:((inverter voltage ph1 < inverter undervolt trip) OR(inverter voltage ph2 < inverter undervolt trip) OR(inverter voltage ph3 < inverter undervolt trip)) AND(not inverter off condition) AND(not system test condition) AND(not inverter just run) AND(not epo request condition) AND(not (current limit condition OR overload condition))

where:inverter undervolt trip 60% of inverter nominal output voltageinverter off condition is true when the inverter has been stop by hand or when

inhibited or blocked or at the machine start up.system test condition see point 1 of MAIN ALARMSinverter just run this conditon is true since the inverter is start for 10 sec.epo request condition see point 4 of MAIN ALARMScurrent limit condition see point 17overload condition see point 15



21. VERIFYING INV. FREQ.

VERIF. FREQ. ONDUL.

UEBERPRUEFUNG FREQU

VERIFICA FREQ. INV.

VERIF. FREC. DE INV.

This message is generated when an invereter start is executed if:(not res normal condition) AND(not system test condition))

It is reset when the inverter frequency goes inside the +–1% nominal frequencywindow.where:

res normal condition means that all the reserve alarms has to be OFF.system test condition see poin1 of MAIN ALARMS

22. VERIFYING BATT.CONT.

VERIF CONTACTEUR BAT

UEBERPRUEFUNG BATT.

VERIFICA TELER.BATT.

VERIF. CONT. BAT.

This message is active when the inverter start is done with the battery contactor open.It disappear when the battery contactor is closed.






This alarm is generated when an inverter start is executed and if after 15 sec. theinverter frequency has not gone inside the +–1% nominal frequency window.The alarm is reset when the frequency goes inside the +–1% window.



LOAD AND RESERVE ALARMS

1. NOT CALIBRATED

NON ETALONNE

NICHT JUSTIERT

NON CALIBRATO

NO CALIBRADO


2. LOAD ON RESERVE

CHARGE SUR SECOURS

LAST AUF RESERVENETZ

CARICO SU RISERVA

CARGA SOBRE RESERVA

This alarm is generated by the following equation:(load on res input) (PL8.5) AND(not reserve switch open input) (PL8.12) AND(not output breaker open input) (PL8.14)

3. LOAD NOT SUPPLIED

CHARGE NON ALIMENTEE

LAST NICHT VERSORGT

CAR. NON ALIMENTATO

CARGA NO ALIMENTADA

This alarm is generated by the following equation:not (bypass breaker closed condition ORload on reserve condition OR((load on inverter condition) AND(not inverter off condition) AND(not output breaker open input)) (PL8.14)

where:bypass breaker closed condition see point 4load on reserve condition see point 2load on inverter condition means the load is supplied by inverterinverter off condition is true when the inverter has been stop by hand or when

inhibited or blocked or at the machine start up.




COMMUT. SUR BYPASS


SEZ. BYPASS CHIUSO

INT. BYPASS CERRADO

This alarm is active if the is active the digital input:bypass breaker closed input (PL8.18)

5. RESERVE SUPPLY FAULT

ABS. VOIE SECOURS

RESERVENETZ STOERUNG

MANCANZA RISERVA

FALLO DE RED RESERVA

This alarm is generated by the following equation:(reserve fail input) (PL8.22) AND(not epo request condition) AND(not reserve switch open input) (PL8.12)

where:epo request condition see point 4 of MAIN ALARMS

6. RESERVE FREQ FAULT

DEF. FREQ. VOIE SEC.

RES.FREQUENZ FALSCH

FREQ RIS FUORI TOLL

FALLO FREC. RESERVA

This alarm is generated by the following equation:(res freq error input) (PL8.6) AND(not epo request condition) AND(not reserve switch open input) (PL8.12)




7. RESERVE VOLTS HIGH

SURTENSION VOIE SEC.

RES. UEBERSPANNUNG

TENS. RISERVA ALTA

TENS. RESERVA ALTA

This alarm is generated by the following equation:(reserve volt high input) (PL8.19) AND(not epo request condition) AND(not res phase fail input) (PL23.8) AND(not reserve switch open input) (PL8.12)


8. RESERVE VOLTS LOW

SOUS–TENS. VOIE SEC.

RES. UNTERSPANNUNG

TENS. RISERVA BASSA

TENS. RESERVA BAJA

This alarm is generated by the following equation:(reserve voltage low input) (PL8.20) AND(not epo request condition) AND(not reserve switch open input) (PL8.12)


9. ST.SW.BLOCKED ON INV

CS BLOQUEE SUR OND.

INV ST.SW. BLOCK.

COMM.ST.BLOCC.SU INV

CONM.ST.BLOC.SBR.INV

This alarm is generated by the following equation:(static switch fault input) (PL8.21) AND(not load on reserve condition) AND(not handling epo)

where:load on reserve condition see point 2handling epo this condition is true since an EPO is recognized until the inverter




10. ST.SW.BLOCKED ON RES

CS BLOQUEE SUR VS

RES ST.SW. BLOCK.

COMM.ST.BLOCC.SU RIS

CONM.ST.BLOC.SBR.RES

This alarm is generated by the following equation:(static switch fault input) (PL8.21) AND(load on reserve condition) AND(not handling epo)

where:load on reserve condition see point 2handling epo this condition is true since an EPO is recognized until the inverter


11. INV.ST. SWITCH FAULT

DEFAUT CS ONDULEUR

INV ST.SW. FEHLER

COMM.STAT.INV.GUASTO


This alarm is generated by the following equation:((inverter voltage ph1 > (nominal ac voltage / 3) OR(inverter voltage ph2 > (nominal ac voltage / 3) OR(inverter voltage ph3 > (nominal ac voltage / 3)) OR(not inverter just stopped) AND(not handling epo)

where:nominal ac voltage is 220 V or 230 V or 240 V.inverter just stopped this condition is true for 2 sec. after the inverter stop.handling epo this condition is true since an EPO is recognized until the inverter




12. OVERLOAD

SURCHARGE

UEBERLAST

SOVRACCARICO

SOBRECARGA

This alarm is generated by the following equation:((load current ph1 > overload trip current) OR(load current ph2 > overload trip current) OR(load current ph3 > overload trip current))

where:overload trip current 105% nominal current. See the technical manual for other

details

13. OUTPUT SWITCH OPEN

INTER. SORTIE OUVERT

AUSG.–SCHALTER OFFEN

SEZ. USCITA APERTO

INT. SALIDA ABIERTO

This alarm is generated by the digital input:output switch open input (PL8.14)

14. RESERVE SWITCH OPEN

INTER. SEC. OUVERT

RESN.–SCHALTER OFFEN

SEZ. RISERVA APERTO

INT. RESERVA ABIERTO

This alarm is generated by the digital input:res switch open input (PL8.12)




ABSENCE D’UNE PHASE

FALSCHES DREHFELD



This alarm is generated by the following equation:(reserve phase fail input) (PL23.8) AND(not epo request condition)


16. RESERVE INHIBITED

VOIE SECOURS INHIBE

RESERVE GESPERRT

RISERVA INIBITA

RESERVA INHIBIDA

This alarm is present while is active the E.P.O. condition.

17. BACKFEED PROT ACTIVE

PROTECT. ANTI–RETOUR

RUECKSP.SPERR. AKTIV

BACKFEED PROT ATTIVO

PROT BACKFEED ACTIVA

This alarm is generated by the digital input:backfeed protect input (PL23.9)



POWER HISTORY CROSS REFERENCE TABLE

Due to the limited dimension of internal microprocessor ram, not all the abovealarms are reported directly in the POWER HISTORY environment.This docoment gives the possibility to the user to understand the relationshipbetween the alarm string that appears on the dispaly and the machine conditionthat has generated the alarm.

1. TESTING BATTERY

BATTERIE EN TEST

BATTERIETEST

PROVA DELLA BATTERIA

PRUEBA DE BATERIAS

This alarm appear if the following condition is true:(battery test condition) OR(full battery test condition)

where:battery test condition see point 2 of MAIN ALARMSfull battery test condition see point 3 of MAIN ALARMS

2. PRIMARY SUPPLY FAIL

ABSEN. RES. PRINCIP.

NETZAUSFALL

MANCANZA RETE

FALLO DE RED

This alarm iis generated by the digital input:primary supply fail input (PL8.8)


DEFAUT ORDRE PHASES

FALSCHES DREHFELD



This alarm iis generated by the digital input:primary phase fail imput (PL8.9)



4. BATTERY FAULT

DEFAUT BATTERIE

BATTERIE DEFEKT

GUASTO BATTERIA

FALLO DE BATERIAS

See point 6 of RECTIFIER AND BATTERY ALARMS

5. BATT CONTACTOR OPEN

CONTACT.BATT. OUVERT

BATTERIEKONT. OFFEN

TELER. BATT. APERTO

CONT. BAT. ABIERTO


6. BATTERY DISCHARGING

BATTERIE EN DECHARGE

BATTERIEENTLADUNG

BATTERIA IN SCARICA

BATERIA EN DESCARGA



COUPURE IMMINENTE


ARRESTO IMMINENTE

PROXIMA DESCONEXION


8. DC VOLTAGE HIGH

SURTENSION DC

DC–UEBERSPANNUNG

TENS. CONTINUA ALTA

TENS. BATERIA ALTA




9. DC VOLTAGE LOW

SOUS–TENSION DC

DC–UNTERSPANNUNG


TENS. BATERIA BAJA


10. OUT OF SYNC

NON SYNCHRONISE

NICHT SYNCHRON

MANCANZA SINCRONISMO

FALTA DE SINCRONISMO

See point 3 of INVERTER ALARMS


ABSENCE D’UNE PHASE

FALSCHES DREHFELD




12. RESERVE SWITCH OPEN

INTER. SEC. OUVERT

RESN.–SCHALTER OFFEN

SEZ. RISERVA APERTO

INT. RESERVA ABIERTO

See point 14 of LOAD AND RESERVE ALARMS

13. INPUT SWITCH OPEN

INTER. ENTREE OUVERT

HAUPT–SCHALTER OFFEN

SEZ. INGRESSO APERTO

INT. ENTRADA ABIERTO




14. OUTPUT SWITCH OPEN

INTER. SORTIE OUVERT

AUSG.–SCHALTER OFFEN

SEZ. USCITA APERTO

INT. SALIDA ABIERTO


15. OVER TEMPERATURE

TEMPERAT. EXESSIVE

UEBERTEMPERATUR

SOVRATEMPERATURA

SOBRETEMPERATURA


16. HARMONIC FILTER OPEN

FILTRE HARMONIQ. OFF

FILTER NICHT AKTIV

FILTRO ARMONICA OFF

FILTRO ARMONICOS OFF



COMMUT. SUR BYPASS


SEZ. BYPASS CHIUSO

INT. BYPASS CERRADO


18. INVERTER VOLTS HIGH

SURTENSION ONDULEUR

WECHSELR. UEBERSPG.

TENS. INVERTER ALTA

TENS. INVERSOR ALTA




19. INVERTER VOLTS LOW

SOUS–TENSION ONDUL

WECHSELR. UNTERSP.

TENS. INVERTER BASSA

TENS. INVERSOR BAJA


20. OVERLOAD

SURCHARGE

UEBERLAST

SOVRACCARICO

SOBRECARGA


21. STOP DUE TO OVERLOAD

ARRET CAUSE SURCHAR.

STOP WEGEN UEBERLAST

STOP PER SOVRACCAR

PARO POR SOBRECARGA


22. DC FEEDBACK FAULT

PERTE DU RETOUR DC

DC REGS. FEHLT

PERDITA CONTR. PONTE

FALLO REDLIMEN. REC


23. CURRENT LIMIT

LIMITAT. DE COURANT

STROMBEGRENZUNG

LIMITE DI CORRENTE

LIMITE DE CORRIENTE




24. LOAD ON RESERVE

CHARGE SUR SECOURS

LAST AUF RESERVENETZ

CARICO SU RISERVA

CARGA SOBRE RESERVA


25. LOAD NOT SUPPLIED

CHARGE NON ALIMENTEE

LAST NICHT VERSORGT

CAR. NON ALIMENTATO

CARGA NO ALIMENTADA


26. INVERTER FAULT

PANNE ONDULEUR

WECHSELR. STOERUNG

GUASTO SU INVERTER

FALLO DE INVERSOR


27. RESERVE SUPPLY FAULT

ABS. VOIE SECOURS

RESERVENETZ STOERUNG

MANCANZA RISERVA

FALLO DE RED RESERVA


28. RESERVE FREQ FAULT

DEF. FREQ. VOIE SEC.

RES.FREQUENZ FALSCH

FREQ RIS FUORI TOLL

FALLO FREC. RESERVA




29. RESERVE VOLTS HIGH

SURTENSION VOIE SEC.

RES. UEBERSPANNUNG

TENS. RISERVA ALTA

TENS. RESERVA ALTA


30. RESERVE VOLTS LOW

SOUS–TENS. VOIE SEC.

RES. UNTERSPANNUNG

TENS. RISERVA BASSA

TENS. RESERVA BAJA


31. STATIC SWITCH FAULT

DEF. COMMUT. STATIQ.

STAT.SCHAL. GESTOERT

COMM. STATICO GUASTO


This message appears if the following condition is true:st sw blocked on inv condition ORst sw blocked on res condition ORinverter backfeed condition

where:st sw blocked on inv condition see point 9 of LOAD AND RESERVE ALARMSst sw blocked on res condition see point 10 of LOAD AND RESERVE ALARMSinverter backfeed condition see point 18 of INVERTER ALARMS

32. INVERTER NOT RUNNING

ONDULEUR ARRETE

WECHSELR. AUS

INVERTER SPENTO

INVERSOR PARADO




33. INVERTER INHIBITED

ONDULEUR INHIBE

WECHSELR. GESPERRT

INVERTER INIBITO

INVERSOR INHIBIDO


34. INVERTER BLOCKED

ONDULEUR BLOQUE

WECHSELR. ANGEHALTEN

INVERTER BLOCCATO

INVERSOR BLOQUEADO








36. BATT. CHARGE INHIBIT

CHARGE BATT. INHIBEE

BATT.LADUNG GESTOPPT

CARICA BATT. INIBITA

CARGA BAT. INHIBIDA


37. BACKFEED PROT ACTIVE

PROTECT. ANTI–RETOUR

RUECKSP.SPERR. AKTIV

BACKFEED PROT ATTIVO

PROT BACKFEED ACTIVA




38. E.P.O. ACTIVE

ARRET URGENCE ACTIVE

NOTAUS AKTIV

E.P.O. ATTIVO

E.P.O. ACTIVO

See point 4 of MAIN ALARMS

39. INV. FEEDBACK FAULT

PERTE DU RET. ONDUL

WECHSELR.REGS. FEHLT

PERDITA CONTR. INV.

FALLO REDLIMEN. INV


40. PCB SUPPLY FAULT

DEFAUT ALIM. CARTES


GUASTO ALIM. PCB

FALLO ALIM. CONT.



Chap. 7 = MAINTENANCE

7 MAINTENANCE

7.1 Periodical maintenance

To ensure continuous reliable service it is recommended that the equipment andbattery are serviced twice a year by a qualified and competent electrical engineerwho has the tools, test equipment and specialist knowledge and skills to worksafely on this equipment.It is also recommended that the equipment be checked daily and monthly by acompetent person and that an equipment log be kept detailing the results of themaintenance checks, any faults that occur, any modifications carried out and anytime that the equipment has been used to maintain the load in the event of amains power supply failure.

WARNING !!

HAZARDOUS VOLTAGES EXIST WITHIN THE UPS CUBICLEAND WITHIN THE BATTERY CUBICLE EVEN WHEN

THE SWITCHES ARE IN THE OFF POSITION.

MAINTENANCE MUST BE PERFORMED BY A COMPETENTPERSON USING ALL THE SAFETY PRECAUTIONS.

Daily:

– Check all readings are within the specified tolerance.

Monthly:

– Carry out a visual check to ensure that all connections are secure, there is nosign of overheating and all ventilation grills are free and clean.

– Maintain the battery cell electrolyte levels in accordance with the BatteryManufacturers instructions (not required for sealed recombination batterycells).

– Lightly grease the battery cell terminals with petroleum jelly for lead acid andkomoline jelly for nickel–cadmium battery cells (not required for sealedrecombination battery cells).

– Check that the battery and its housing are clean and dry.



Six monthly:

– Carry out the monthly checks– Check that the battery is fully charged, simulate mains failure and ensure that

the battery maintains the load for 25% of its rated period.

Twelve monthly:

– Carry out a battery electrolyte specific gravity test and adjust as necessary(not required for sealed recombination battery cells).

– Carry out the six monthly checks.

Three yearly:

– Support the load on the BY–PASS supply, switch the equipment off anddisconnect the battery.

– Carry out a detailed continuity and insulation test– Carry out an earth bonding check– Reconnect the battery and switch the equipment on.– Carry out a battery electrolyte specific gravity test and adjust as necessary

(not required for sealed recombination battery cells).– Carry out the monthly checks– Simulate a mains failure and ensure that the battery maintains the load for 100%

of its rated period.



7.2 Float Voltage settings

The float voltage setting for the EDP70 is temperature compensated. This shouldbe set up according to the following table for different ambient temperatures.o set the float voltage, connect a 1A load to the DC bars, then, with the inverterstopped, by using a 4 figures DVM, operate on VR1 of the Rectifier ControlBoard.AMBIENT TEMPERATURE Float Voltage of BATTERY 144 cells 198 cells COMPARTMENT

[·C]17 328.0 450.818 327.6 450.319 327.2 449.820 326.9 449.321 326.5 448.822 326.2 448.323 325.8 447.924 325.4 447.425 325.1 446.926 324.7 446.527 324.4 445.928 324.0 445.429 323.6 444.930 323.3 444.531 322.9 444.032 322.6 443.533 322.2 443.034 321.8 442.535 321.5 442.036 321.1 441.537 320.7 441.138 320.4 440.639 320.0 440.140 319.7 439.6


Chap. 8 = CIRCUIT DIAGRAM LIST

8 CIRCUIT DIAGRAMS LIST

WARNING: the enclosed circuit diagrams are supplied only for information, andare at the revision level of the date of printing.

System Circuit:

for UPS up to 20kVA 10C71148for UPS above 20 & up to 40 kVA 10C71178for UPS above 40kVA 10C71245

Rectifier Control Board: 15C90073

Inverter Control Board: 15C70512

Static Switch Control Board: 15C90074

Display Control Board: 15C90072

Interface Board : 15C70516

Base driver Board: 15C70533

Mimic PCB: 15C90075

St. Sw. Firing & Snubber Board: 15C70517

Rectifier Firing & Snubber Boar: 15C70536

R.F.I. Filter Board: 15B70559

S.M.P.S. Board: 15C70514

Transformer Board: 15C70515

EDP70 UNINTERRUPTIBLE POWER SYSTEM TECHNICAL...

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