PS 441Directional Time-OvercurrentProtective Device

1 PS 441 in case for wall surface or panel flush mounting

PS 441 directional time-overcurrent protective devic-es are used for selectiveshort-circuit protection inhigh-voltage networks.

The networks can be operat-ed with impedance neutralgrounding, with resonantgrounding, or with an isolatedneutral.

The PS 441 directional time-overcurrent protective devicehas the following features:❏ four-pole measurement

(A, B, C, N),❏ phase-selective phase

current timer module withDTOC and IDMT character-istics(IDMT can be set to nor-mally inverse, very inverse,extremely inverse, longtime ground fault or RIinverse),

❏ time-lag high set phasecurrent timer module,

❏ residual current timermodule with DTOC andIDMT characteristics(IDMT can be set to nor-mally inverse, very inverse,extremely inverse, longtime ground fault or RIinverse),

❏ time-lag high set residualcurrent timer module,

❏ tripping matrix,❏ optional latching of the

individual tripping criteria,❏ possibility of reverse inter-

locking,❏ supplementary short-circuit

direction determinationfeature

❏ signal comparison throughpilot wires

❏ circuit-breaker failureprotection.

The residual current input isdesigned for standard or forhigh sensitivity, as desired.

In addition to the featureslisted above, as well ascomprehensive self-monitor-ing and fault diagnosis, thePS 441 is equipped with thefollowing supplementaryfunctions:❏ measuring circuit monitor-

ing❏ operating data acquisition❏ event counting❏ fault data acquisition❏ fault logging

The PS 441 is constructedwith a multifunctional casedesign that is equally wellsuited for wall surface mount-ing or panel flush mountingdue to the reversible terminalblocks and reversible mount-ing brackets.The auxiliary voltage for thepower supply can beswitched internally from110-250 V DC to 24-60 V DC.

The PS 441 has the followinginputs and outputs:❏ 4 current-measurement

and 3 voltage-measure-ment inputs,

❏ 2 binary signal inputs(optical couplers) withfreely configurable functionassignment,

❏ 8 output relays with freelyconfigurable functionassignment.

Control and display:❏ local control panel,❏ 12 LED indicators, includ-

ing 9 with freely configura-ble function assignment

❏ PC interface.

Parameters may be set eitherfrom the local control panel,through the PC interface orvia the optional ILSA inter-face, as desired.

The ILSA interface supportslinking of the PS 441 to anintegrated substation controlsystem such as ILS.

Numerical Directional Time-OvercurrentProtection with Definite-Time andInverse-Time Characteristics

abcd

2

Normally inverse

t = · ––––––––––– s

Very inverse

t = · ––––––––––– s

Extremely inverse

t = · ––––––––––– s

Long time earth fault

t = · ––––––––––– s

RI inverse

t = · ––––––––––– s

PS 441 Directional Time-Overcurrent Protective DeviceFunctions

2 Inverse-time characteristics 3 Directional characteristics in short-circuit direction determination

0.14(I /IB)0.02 – 1

13.5(I /IB) – 1

80(I /IB)2 – 1

120(I /IB) – 1

1

The following triggering timecharacteristics are availablein the inverse time-delaymode:❏ normally inverse,❏ very inverse❏ extremely inverse,❏ long time ground fault,❏ RI inverse.

Mode, base current, charac-teristic type and characteris-tic factor can be set inde-pendently for the phasecurrent timer module and theresidual current timer module.

Tripping Matrix and Latch

The tripping matrix is used todecide which of the individu-al overcurrent timer modulesshall participate in formingthe general trip command.The phase-selective phasecurrent timer module ispermanently assigned to thegeneral trip command; thiscannot be changed. Anothermatrix is used to determinewhich of the individual trip-ping criteria shall result inlatching of the general tripcommand.

Definite orInverse Time-DelayShort-Circuit Protection

The PS 441 directional time-overcurrent protective deviceis equipped with four current-measurement inputs A, B, Cand N and has the followingovercurrent timer modules:❏ phase-selective phase

current timer module I>/tI>,❏ residual current (neutral

current) timer module IN>/tI,N>,❏ high set phase current

timer module I>>/tI>>,❏ high set residual current

timer module IN>>/tI,N>>.

The modules measured in theground path have an effecton the general start signaland therefore on the start of afault record, and this effectcan be inhibited, if desired.Formation of the general tripcommand by the residualcurrent timer modules is thenautomatically disabled.

The phase current timermodule tI> and the residualcurrent timer module tI,N> canhave a definite-time delay oran inverse-time delay, asdesired.

The function of circuit breakerfailure protection is alsoconsidered in the trippingmatrix and in the matrix forsetting the latching function.

Reverse Interlocking

The individual overcurrenttimer modules can beblocked externally by twoindependent signals. In thisconnection it is possible byusing one selection matrix todetermine which of the timermodules shall be included inthe block. This makes itpossible to add on a featuresuch as reverse interlocking,for example (”busbar protec-tion with starting scan”).

characteristicfactor

characteristicfactor

characteristicfactor

characteristicfactor

characteristicfactor

Measure- Start Selec- Measurands Characristicment ted Angle αP or αNSystem Imeas Vmeas

P A IA VB-C = VB-N – VC-N +45°B IB VC-A = VC-N – V A-N +45°C IC VA-B = VA-N – VB-N +45°

A - B IA VB-C = VB-N – VC-N +60°B - C IC VA-B = VA-N – VB-N +30°C - A IC VA-B = VA-N – VB-N +60°

A - B - C IC VA-B = VA-N – VB-N +45°

N N IN VNG = –1/3 · (VA-N + VB-N + VC-N) –90° to +90° (adjustable)

0.339 – –––––0.236(I/IB)

Short-Circuit DirectionDetermination

The short-circuit directiondetermination function makesit possible for the PS 441 tobe used as directional time-overcurrent protection. Onecan select separately foreach individual time-overcur-rent timer module whether themodule shall be forward-directed, reverse-directed ornon-directional. The direc-tions for the phase currenttimer modules and the resid-ual current timer modules aredetermined in separatemeasurement systems.

In the direction measuringsystem for the phase currenttimer modules the phase-to-phase voltage opposite theselected phase current isused for direction determina-tion as a function of the typeof fault, and an optimumcharacteristic angle is used(see Figure 3).

Vmeas (reference quantity)

backward decision

forward decision

a

I meas

1171

7.D

S4

3

In the direction measuringsystem for the residual cur-rent timer modules, directionis determined using theinternally computed neutraldisplacement voltage; thecharacteristic angle is adjust-able with reference to thevarious network starpointtreatments. The directionmeasuring system for theresidual current timer mod-ules is not enabled until a setvalue for neutral displace-ment voltage is exceeded. Inthis connection one canselect whether the triggeringpreorientation for a non-enabled direction measuringsystem for residual currenttimer modules shall beblocked in the event of phasecurrent starting.

Teleprotection

Teleprotection can be used inconjunction with short-circuitdirection determination. Forthis purpose the protectivedevices must be suitablyconnected by pilot wires onboth ends of the line sectionto be protected. One canselect whether teleprotectionwill be controlled by thedirection measuring systemof the phase current timermodules only, by the direc-tion measuring system of theresidual current timer mod-ules only, or by the directionmeasuring systems of thephase current and residualcurrent timer modules. Forprotective devices on theinfeed side of radial net-works, teleprotection canalso be controlled without theshort-circuit direction deter-mination function.

PS 441 Directional Time-Overcurrent Protective DeviceFunctions(continued)

Circuit Breaker FailureProtection

When the trip command isissued a timer module formonitoring the circuit breakeris also started. When thistimer module has elapseddue to a sustained generalstart condition, then thecircuit breaker failure signalis issued.

The input of a circuit breakerfailure signal through anappropriately configuredbinary input brings about anon-delayed trip command ifthe general start signal ispresent.

Measuring-CircuitMonitoring

Measuring-circuit monitoringincludes phase current andphase-to-phase voltagemonitoring. Phase-to-phasevoltage monitoring is onlyactive if the short-circuitdirection determinationfunction is activated.

Phase current monitoring isbased on the principle ofmaximum allowable magni-tude unbalance, whereby thearithmetic difference betweenthe maximum and minimumphase currents as referred tothe maximum phase currentis compared with the setthreshold operate value.Even with an economy-typeCT connection (CTs in onlytwo phases) it is possible tomonitor the phase currentsgiven appropriate settings.

Phase-to-phase voltagemonitoring is based on aplausibility check involvingthe phase currents. If a lowcurrent threshold setting isexceeded by at least onephase current, the threephase-to-phase voltages aremonitored for a set minimumlevel.

Fault Recording

The sampled values of thethree phase currents and thethree phase-to-ground volt-ages are recorded during afault event with additionalpre- and post-roll. A memoryarea of a total of 4 s record-ing depth is reserved for thispurpose in the PS 441. Thesampled values of up to fivefaults may be written to thismemory. If there are morethan five faults, or if themaximum recording time of 4 sis exeeded, the oldest fault(s)will be overwritten. The mostrecent fault is stored in non-volatile memory. The identifi-cation of the individual faultsby a number is the same asthat of the fault event record.

Using a personal computerand the analysis and controlprogram FPC the fault re-cording as well as the protec-tion indications can be readvia the PC or ILSA interfaceand displayed together as afunction of time.

Self-Monitoring

Extensive monitoring routinesin the PS 441 ensure thatinternal hardware or softwarefaults will not lead to malfunc-tioning of the protectiverelaying system. When theauxiliary voltage VA is turnedon, a function test is carriedout. Cyclic self-monitoringtests are run during opera-tion. If test results deviatefrom the default value, a faultsignal is issued. The result offault diagnosis determineswhether a protective blockwill occur or whether only awarning will be issued. Thefaults diagnosed in conjunc-tion with self-monitoring arestored in a memory (monitor-ing signal memory).The contents of the monitor-ing signal memory can beread from the local controlpanel.

Operating Data Acquisi-tion

The PS 441 directional time-overcurrent protective deviceacquires the following meas-ured operating data, updat-ing them at approximately 1 sintervals, as long as a fault isnot being processed at thetime:❏ maximum value of the three

phase currents,❏ phase currents,❏ residual current,❏ phase-to-phase voltages,❏ neutral-to-ground voltage.

The measured data aredisplayed as r.m.s. valuesand are normalized to thecorresponding nominal valueof the protective device.

Event Counting

The PS 441 directional time-overcurrent protective devicecounts the following events:❏ tripping on faults,❏ faults,❏ warning entries.

Fault Data Acquisition

After the end of a generalstart condition, the followingmeasured fault data areacquired:❏ running time,❏ short-circuit current.

Fault Logging

The signals appearing duringa fault are logged in chrono-logical order. A total of fivefaults, each involving amaximum of 63 starting orending signals, can bestored in a ring memory(signal memory). If there aremore than five faults and nofaults have been erased inthe interim, the oldest faultlog with be overwritten. Afour-digit resettable counteridentifies the individual faultsby serial number. The faultlogs can be read from thelocal control panel.

4

PS 441 Directional Time-Overcurrent Protective DeviceDesign

4 Local control panel

Mechanical Design

The PS 441 consists of analuminum case with reversi-ble plug-in screw-type termi-nals and reversible sidebrackets. The case can beused for wall surface mount-ing or for panel flush mount-ing, as desired. In eithercase the unit is connected byscrew terminals.

The processor module carry-ing the local control panel ismounted directly on the rearof the removable front panel.It is connected to the com-bined input-output module bya flat connecting cable. Theinput-output module containsthe voltage supply, the inputtransducers, the outputrelays, and the optical cou-plers for the binary inputs.

In the front panel are win-dows for the display andlabel strips located behindthem. The keyboard for theintegrated local control paneland the PC interface are alsolocated in the front panel.

Figure 5 on Page 10 showsthe case and mountingdimensions.

Local Control Panel

The integrated local controlpanel has two 4-digit7-segment LCD displays andsix keys. The settings, meas-urands and signals arenumerically coded. Thiscode is called the addressand is displayed in the lower4-digit 7-segment display.Accidental or unauthorizedmodification of settings isimpeded by access barriers.

Twelve light-emitting diodesare provided as visual indica-tors. The first three havepermanent signal assign-ments, while the other ninecan be configured as desired(see Page 9).

The control panel has twolabel strips. The strip on theleft is used to label the LEDindicators, and the strip onthe right provides a visualrecord of frequently per-formed control steps. Bothstrips can be replaced andlabeled by the user as de-sired.

5

PS 441 Directional Time-Overcurrent Protective DeviceTechnical Data

General Data

DesignCase suitable for wall surfacemounting or panel flush mounting.

Installation PositionVertical ± 30°

Degree of ProtectionPer DIN 40 050IP 51

Weight4 kg

DimensionsSee Page 10

Terminal Connection DiagramSee Page 10

PC InterfaceDIN 41652 connector, typeSubmin-D, 9-pin.A special connector cable is requiredfor electrical isolation.

ILSA InterfaceOptical fiber interface F-SMA

TerminalsScrew-type M4 terminals,self-centering with wire protection forconductor cross sections of0.5 to 6 mm2 or 2 x 2.5 mm2

Creepage Distances and ClearancesPer IEC 255-5Group C

Notices

The product designated as „PS 441Directional Time-Overcurrent Protec-tive Device“ has been designed andmanufactured in conformance withinternational standard EN 60255-6and also with the „EMC Directive“and the „Low Voltage Directive“issued by the Council of the EuropeanCommunity.

DQS CertificateDQS (Deutsche Gesellschaft zurZertifizierung von Qualitäts-sicherungssystemen), an internation-ally recognized, independent andneutral association for the certificationof quality assurance systems, hasawarded AEG the DQS certificate,thereby certifying that AEG hasintroduced and uses a qualityassurance system that conforms tothe state of the art and satisfies allrequirements stated in DIN ISO 9001that apply to its products andservices.

Tests

Type Test

All tests in accordance withEN 60255-6 and DIN 57435 Part 303

EMC

Emitted InterferencePer EN 50022 and DIN VDE 0878 Part 3.Class B

1 MHz BurstPer IEC 255 Part 22-1,Class IIICommon-mode or longitudinalvoltage: 2.5 kVNormal-mode or transverse voltage:1.0 kVTest duration: > 2 sSource impedance: 200 Ω

Immunity to Electrostatic DischargePer EN 60801 Part 2Severity: 3Contact discharge,single discharges: > 10Hold time: > 5 sTest voltage: 6 kVTest generator:50 to 100 ΜΩ, 150 pF / 330 Ω

Immunity to High-FrequencyElectromagnetic FieldsPer EN 50140Severity: 3Antenna-testpiece distance:> 1 m on all sidesField strength in range 80 to 1000 MHz:10 V/mTest with AM: 1 kHz / 80%Single test at 900 MHz:AM 200 Hz / 100%

Burst ImmunityPer IEC 801-4Severity: 3Rise time: 5 nsHalf-value time: 50 nsAmplitude: 2 kV or 1 kVBurst duration: 15 msBurst period: 300 msSource impedance: 50 Ω

Surge Withstand CapabilityPer IEC 1000-4-5Installation class: 3Test of power supply circuits,asymmetrical or symmetrical linesOpen-circuit voltage: 1.2 / 50 µsShort-circuit current: 8 / 20 µsAmplitude: 1 or 2 kVPulses: > 5/minSource impedance: 12 or 42 Ω

Immunity to Conducted InterferenceInduced by High-Frequency FieldsPer IEC 65A or 77B, Sec.145 or 110Severity: 2Test voltage: 3 V

Immunity to Magnetic Fields HavingPower Engineering Frequencies

Per EN 61000-4-8Severity: 4Frequency: 50 HzField strength: 30 A/m

EMC (continued)

Immunity to Interruption and Ripple inAuxiliary DC QuantitiesPer IEC 255-1112% or 50 ms

Insulation

Voltage TestPer IEC 255-52 kV AC, 60 sDirect voltage (2.8 kV DC) must beused when administering the voltagetest to the power supply inputs. ThePC interface must not be subjected tothe voltage test.

Surge Withstand Capability TestPer IEC 255-5Front time: 1.2 µsTime to half-value: 50 µsPeak value: 5 kVSource impedance: 500 Ω

Mechanical Strength

Vibration TestPer IEC 255 Part 21-1Test severity class 1Frequency range in operation:10 to 60 Hz, 0.035 mm60 to 150 Hz, 0.5 gFrequency range during transport:10 to 150 Hz, 1 g

Shock TestPer IEC 255 Part 21-2Test severity class 1Acceleration: 5 g/15 gPulse duration: 11 ms

Seismic TestPer IEC TC 41 B (CO) 54Class 1Frequency range:4 to 8 Hz, 3.5 mm / 1.5 mm9 to 36 Hz, 1.0 g / 0.5 g

Routine TestAll tests per EN 60255-6 andDIN 57435 Part 303

Additional Thermal Test100% controlled temperature-risetest, inputs loaded

Environmental Conditions

Allowable Ambient TemperaturesOperating temperature: -5°C to +55°CStorage temperature: -25°C to +55°CTransport temperature: -25°C to +70°C

Moisture ExposureRelative humidity (annual average),which must not result in moisturecondensation: 45 to 75%

6

PS 441 Directional Time-Overcurrent Protective DeviceTechnical Data(continued)

Inputs and Outputs

Measurement Inputs

CurrentNominal current Inom: 1or 5 A(per order)Nominal consumption per phase:< 0.3 VA at InomLoad rating:continuous: 4 Inomfor 10 s: 30 Inomfor 1 s: 100 Inom

VoltageNominal voltage Vnom:100 to 130 V ACNominal consumption per phase:< 0.3 VA at VnomLoad rating:continuous 156 V AC

FrequencyNominal frequency fnom:50 and 60 Hz (switchable)

Binary Signal Inputs

Equipment:2 optical coupler inputs (freelyconfigurable)Function assignment: see Page 9Nominal auxiliary voltage VI,nom:24 to 250 V DCOperating range: 0.8 to 1.1 VI,nomwith a residual ripple of up to 12% ofVI,nomPower consumption per input:35 mA ± 30% at VI,nom = 24 V DC15 mA ± 30% at VI,nom = 48 V DC4 mA ± 30% at VI ,nom = 60 to 250 V DC

Output Relays

Equipment:8 output relays (freely configurable)

Function assignment: see Page 9

Contact ratingRated voltage:300 V DC, 250 V ACContinuous current: 5 AShort-time current: 30 A for 0.5 sMaking capacity:1000 W (VA) at L/R = 40 msBreaking capacity:0.2 A at 220 V DC and L/R = 40 ms4 A at 230 V AC and cos ϕ = 0.4

Local Control Panel

Input or output of protection data:via six keys and two 4-digit displaysState and fault signals:12 LED indicators(3 permanently assigned,9 freely configurable)Function assignment: see Page 9

PC Interface

Transmission speed:300 to 9600 baud (adjustable)A special PC connector cable isrequired for connecting to a PC (seePage 12)

ILSA Interface

Transmission speed:50 to 19200 baud (adjustable)

Information Output

Operating Data Acquisition

Max. phase current Increments:IP,max primary: 0 to 9999 A 1IP,max p.u.: 0 to 60.00 Inom 0.01

Phase currentsIA: 0.00 to 60.00 Inom 0.01IB: 0.00 to 60.00 Inom 0.01IC: 0.00 to 60.00 Inom 0.01

Residual (neutral) currentIN: 0.000 to 9.999 Inom 0.001

Phase-to-phase voltageVA-B: 0.00 to 2.00 0.01VB-C: 0.00 to 2.00 0.01VC-A: 0.00 to 2.00 0.01

Neutral-to-ground voltageVN-G: 0.00 to 1.50 Vnom / √3

Load angle ϕA, ϕB, ϕC:–180° to +180° 1

Energy direction P:A B Cbackward backward backwardbackward backward forwardbackward forward backwardbackward forward forwardforward backward backwardforward backward forwardforward forward backwardforward forward forward

Energy direction N:backward/forward

Phase relation IN to Σ I:in opposition/in phase

Event Counting

Number of trip commands: 0 to 9999Number of warnings: 0 to 30Number of faults: 0 to 9999

Fault Data Acquisition Increments:

Running time:0.00 to 99.99 s 0.01Short-circuit current:0.00 to 60.00 Inom 0.01

Fault Logging

Maximum number of faults that canbe stored in memory:5 (then oldest fault is erased)

Number of signals per fault that canbe stored in memory:63 (then overflow signal)

Real-time tags:via internal clock

Settings

Default Settings

Nominal Frequency50 Hz60 Hz

Residual Current Determination IN>normalsensitive

Measuring-Circuit Connectionstandardreversed

Phase Sequenceanti-clockwiseclockwise

Block tI,N>, tI,N>>nonewith single-phase starting I>with polyphase starting I>

General Startwithout IN> or IN>>with IN> or IN>>

Trip Command 1/2t I>t I> CBFt I> tI,N>t I> tI,N> CBFt I> tI>>t I> tI>> CBFt I> tI>> tI,N>t I> tI>> tI,N> CBF

Latching 1/2no latching

CBFtI,N>tI,N> CBF

tI>>tI>> CBFtI>> tI,N>tI>> tI,N> CBF

t I>t I> CBFt I> tI,N>t I> tI,N> CBFt I> tI>>t I> tI>> CBFt I> tI>> tI,N>t I> tI>> tI,N> CBF

Trip Command 2/2without tI,N>>with tI,N>>

Latching 2/2without latching at tI,N>>with latching at tI,N>>

Block N1no block

tI,N>>tI,N>tI,N> tI,N>>

tI>>tI>> tI,N>>tI>> tI,N>tI>> tI,N> tI,N>>

t I>t I> tI,N>>t I> tI,N>t I> tI,N> tI,N>>t I> tI>>t I> tI>> tI,N>>t I> tI>> tI,N>t I> tI>> tI,N> tI,N>>

Block N2See selection for block N1

Fault recording

Measurands:Phase currents IA, IB, IC(IN calculated upon output)Phase-to-ground voltagesVA-G, VB-G, VC-G, up to 1Vnom(VN-G calculated upon output)

Dynamic range:66 Inom and 1.5 Vnom

Peak value resolution below 6% ofdynamic range:at Inom = 1 A: 16 mA r.m.s.at Inom = 5 A: 80 mA r.m.s.or 36,6 mV r.m.s.

Peak value resolution above 6% ofdynamic range:at Inom = 1 A: 256 mA r.m.s.at Inom = 5 A: 1280 mA r.m.s.or 586 mV r.m.s.

Recording time per fault: max 4 s

Maximum number of faults stored: 5(then oldest fault will be cleared)

Total recording time: max 4 s(then oldest fault will be cleared)

Self monitoring

number of storable monitoringindications: max 29(then overflow indication)

7

TypicalCharacteristic Data

Time-Overcurrent Protection

Starting reset timefrom 2-fold threshold operating value to 0:≤ 25 ms

Shortest tripping time:ca. 30 ms

Resetting ratio:≥ 0.95 (starting and measurement)

Minimum output pulse for trip command:100 ms

Short-Circuit DirectionDetermination

Nominal acceptance angle fordirection decision:±90°

Resetting ratio:≤7°

Phase elements

Base point releases for phase currents:0.05 Inom

Base point releases for phase-to-phase voltages (direction check):0.6 Vnom

Base point releases for phase-to-phase voltages (direction evaluation):0.001 Vnom

Base point release for residualcurrent:Normal range: 0.05 InomSensitive range: 0.005 Inom

Base point release for ground-to-neutral voltage:0.015 to 0.6 Vnom / √3 (adjustable)

Deviations

Reference conditions

Deviation relative to setting forsinusoidal signals, total harmonicdistortion ≤ 2%,ambient temperature 20 °C andnominal auxiliary voltage VA,nom

Time-Overcurrent Protection

Deviation under reference conditions:±5%Variation at 20°C ±20 K: ±1%Variation at fnom ±5%: ±5%Variation at VA,nom ±20%: ±0.5%

Time Delays

Deviation under reference conditionsfor inverse time delays:±5% +10 to 20 ms at I ≥ 2 IB(±7.5% for extremely inverse)for definite time delays:±0.5% +20 to 40 msVariation at 20°C ±20 K: ±1%Variation at fnom ±5%: ±2.5%Variation at VA,nom ±20%: ±0.5%

Direction Determination

Deviation under reference conditions:±10°Variation at 20°C ±20 K: ±2Variation at fnom ±5%: ±1°Variation at VA,nom ±20%: ±0.5°Base point releases: ±10%

Operating Value Measurement

Currents > 0.2 InomDeviation: ±5%Variation at 20°C ±20 K: ±2.5%Variation at VA,nom ±20%: ±1%

Fault Data Acquisition

Fault currentDeviation: ±5%Variation at 20°C ±20 K: ±2.5%Variation at VA,nom ±20%: ±1%

Internal Clock

With free running internal clockDeviation: < 1 min. / month

With synchronization via DCF77 clockDeviation: < 10 ms

Power Supply

Nominal auxiliary voltage VA,nom:24 to 60 V DC and (internally switchable)110 to 250 V DC or 100 to 230 V AC

Operating range for direct voltage:0.8 to 1.1 VA,nomwith a residual ripple of up to 12% of VA,nom

For alternating voltage:0.9 to 1.1 VA,nom

Nominal consumption:approx. 8 W / 10 W(initial position / active position)at VA = 220 V DC

Start-up peak current:< 13 A, duration 0.25 ms

Short-Circuit DirectionDetermination

Activated: no/yes

Direction for tI>, tI>>, tI,N>, tI,N>>:forward-directedbackward-directednon-directed

Charac. angle αG:–90° to +90°; Increments: 5

Threshold operate value VN-G>:0.05 to 0.60 Vnom/√3; Increments: 0.05

Triggering pre-orientation:no/yes

Block preorientation N:no/yes

Circuit Breaker FailureProtection

tCBF: 0.00 to 9.99/∞ s; Increments: 0.01

Measuring-Circuit Monitoring

Mode Idiff>:withoutIA, ICIA, IB, IC

Threshold operate value Idiff>:0.25 to 0.50 IPmax; Increments: 0.05

Threshold operate value Vmin: Increments:0.1 to 40.0/∞ Inom 0.1

Delay time t I>: Increments:0.00 to 9.99 s 0.0110.0 to 99.9/∞ s 0.1

Hold time tI> hold: Increments:0.0 to 9.9 s 0.110 to 600 s 1

Threshold operate value I>>: Increments:0.1 to 40.0/∞ Inom 0.1

Delay time t I>>: Increments:0.00 to 9.99 s 0.0110.0 to 99.9 s 0.1

IDMT

Base current IB: Increments:0.10 to 4.00 Inom 0.01

Characteristic factor: Increments:0.10 to 4.00 Inom 0.01

Characteristic type:Normally inverseVery inverseExtremely inverseLong time ground faultRI inverse

Hold time tI> hold: Increments:0.0 to 9.9 s 0.110 to 600 s 1

Threshold operate value I>> andDelay time tI>>: see DTOC

Time Overcurrent ProtectionResidual Current

DTOC

Threshold operate value IN>: Increments:IN = norm.: 0.02 to 8.00/∞ Inom 0.01IN = sens.: 0.002 to 0.800/∞ Inom 0.001

Delay time t I,N>: Increments:0.00 to 9.99 s 0.0110.0 to 99.9/∞ s 0.1

Hold time tI> hold: Increments:0.0 to 9.9 s 0.110 to 600 s 1

Threshold operate value IN>>:Increments:IN = norm.: 0.02 to 8.00/∞ Inom 0.01IN = sens.: 0.002 to 0.800/∞ Inom 0.001

Delay time t I,N>>: Increments:0.00 to 9.99 s 0.0110.0 to 99.9/∞ s 0.1

IDMT

Base current INB: Increments:IN = norm.: 0.02 to 8.00/∞ Inom 0.01IN = sens.: 0.002 to 0.800/∞ Inom 0.001

Characteristic factor: Increments:0.10 to 4.00 Inom 0.01

Characteristic type:Normally inverseVery inverseExtremely inverseLong time ground faultRI inverse

Hold time tI> hold: Increments:0.0 to 9.9 s 0.110 to 600 s 1

Threshold operate value IN>> andDelay time t I,N>>: see DTOC

PS 441 Directional Time-Overcurrent Protective DeviceTechnical Data(continued)

8

Signal Inputs

The signal inputs allow inter-vention in the protectivesequence. Each input can beset for one of the signalsgiven in Table 1. However, agiven signal may be as-signed to only one input. Thesignal names refer to the”active” state of the inputsignal. Each input can be setas follows:active = low signalactive = high signal.

Abbreviations for Func-tion Groups

CBF: circuit breakerfailure protection

DTOC: definite-timeovercurrentprotection

FREC: fault recording

IDMT: inverse definiteminimum timeovercurrent protection

MAIN: main function

MCM; measuring-circuitmonitoring

MON: self-monitoring

PSIG: protectivesignaling/teleprotection

SCDD: short-circuitdirectiondetermination

Output Relays

The output relays are freelyconfigurable and can beassigned any of the signalslisted in Table 3. Any signalcan also be assigned to morethan one free output relay forcontact multiplicationpurposes.

All relays operate in open-circuit arrangement (themake contact is closed whenthe signal is present) exceptfor the case where an outputrelay is configured for thesignal ”MAIN: Blocked/faulty.” In this case the con-tact opens when the deviceis blocked/faulty.

PS 441 Directional Time-Overcurrent Protective DeviceSignal List

LED Indicators

Three LED indicators on thelocal control panel havepermanently assigned sig-nals (Table 2a). The othernine LED indicators are freelyconfigurable and can beassigned any of the signalslisted in Table 2b.

9

U 1

U 2

Table 1:Freely ConfigurableSignal InputsInput Func- Signal

tionGroup

w/o Function

CBF: Input EXT

ILSA: Command enable EXTSig./meas.block EXT

MAIN: Block outp.rel. EXTE2 block EXTE1 block EXTm.c.b.trip VLS EXTReset indicat. EXTReset latch. EXTReset latch.+ind.EXT

PC/ILSA: Test mode EXT

PSIG: Enable EXTBlocking EXTDisable EXTReceive EXT

Table 3:Freely ConfigurableOutput RelaysRelay Func- Signal

tionGroup

w/o Function

CBF: tCBF elapsedTrip by CBF

DTOC: General startingStarting AStarting BStarting CStarting GFStarting I>>Starting IN>>tI,N>> elapsedtI>> elapsed

FREC: I> triggered

IDMT/DTOC: Starting I>

tH,I runningtH,I,N runningtI,N> elapsedtI,N> or tI,N>>tI> elapsedtI> or tI>>

MAIN: Blocked/faultym.c.b.trip V,LS EXTTrip command

MCM: Meas.circuits faultySCDD blocked

MON: Warning

PSIG: EnabledNot readyReadySendTelecom. faultyTrip by PSIG

SCDD: Fault L backwardFault L forwardFault P or G backw.Fault P or G forwd.Ground fault backw.Ground fault forwd.

K 1

K 2

K 3

K 4

K 5

K 6

K 7

K 8

Table 2b:Freely ConfigurableLED IndicatorsIndi- Func- Signalcator tion

Group

w/o Function

CBF: Input EXTtCBF elapsedTrip by CBF

DTOC: General startingStarting AStarting BStarting CStarting GFStarting I>>Starting IN>>t I,N>> elapsedt I>> elapsed

FREC: I> triggered

IDMT/DTOC: Starting I>

tH,I runningtH,I,N runningt I,N> elapsedt I,N> or tI,N>>t I> elapsedt I> or t I>>

MAIN: E1 block EXTE2 block EXTm.c.b.trip VLS EXTTrip command

MCM: Meas.circuits faultySCDD blocked

PSIG: Blocking EXTEnabledNot readyReadyReceive EXTSendTelecom. faultyTrip by PSIG

SCDD: Fault L backwardFault L forwardFault P or G backw.Fault P or G forwd.Ground fault backw.Ground fault forwd.

H 4

H 5

H 6

H 7

H 8

H 9

H 10

H 11

H 12

Table 2a:Permanently ConfiguredLED IndicatorsIndi- Func- Signalcator tion

Group

H 1 MON: Warning

H 2 MAIN: Operation

H 3 MAIN: Blocked/faulty

PS 441 Directional Time-Overcurrent Protective DeviceSignal List(continued)

10

PS 441 Directional Time-Overcurrent Protective DeviceDimensional Drawing and Terminal Connection Diagram

5 Dimensional drawing and panel cutout

6 Terminal connection diagram

1171

8.D

S4

panel cutout and mounting frame outlinewall surface mounting panel flush mountingwall surface mounting

18

36

1

19

F

x y

E R

!

PS 441

175.6

254

125

6.4

294.

2

299

X1X1X7 X8

X6

X3 X330

9

20.6

48.6

93

289

9

294.

2

279

65.6

20.6

172

162.5± 0.5

125± 0.5

300

281

+1

256

+1

Æ 6.4

H1

H2

H3

H4

H5

H6

H7

H8

H9

H10

H11

H12

X3353633323430293127282226252423201921

D1D2E2

X6235

X113

14

L+

L–

X11

23

45

67

8

A1

A2B1

B2C1

C2N1

N2

X19

10

11

12

A

B

C

N

L+L–L+L–

X115161718

Power Supply

Meas. Inputs

LEDIndicators

AusgangsrelaisSignal Inputs

PC Interface

PS 441

U1

U2

U100

T1

T2

T3

T4

T5

T6

T7

Aux voltage VA 2)

K1

K2

K3

K4K5K6K7

K8

1171

9.D

S4

Main: Trip command 1)

IDMT/DTOC: General starting 1)

MCMON: Meas. circuit faulty 1)

DTOC: tI>> elapsed 1)IDMT/DTOC: tI> elapsed 1)DTOC: tI,N>> elapsed 1)IDMT/DTOC: tI,N> elapsed 1)

Main: Blocked/Faulty 1)

MON: Warning

Main: Operation

Main: Blocked/Faulty

IDMT/DTOC: Starting A 1)

IDMT/DTOC: Starting B 1)

IDMT/DTOC: Starting C 1)

IDMT/DTOC: Starting GF 1)

IDMT/DTOC: tI> or tI>> 1)

IDMT/DTOC: tI,N> or tI,N>> 1)

SCDD: Phase fault backw. 1)

SCDD: Ground fault backw. 1)

CBF: Input EXT 1)

MAIN: Reset ind. EXT 1)

1)

3)

##

##

ILSA Interface(option)

X7

X81) Freely assignable (see signal list at page 9, showed assignments are factory default)

2) L+ und L- circuit may be tested only with 2.8 kV DC to ground

3) Internal interface, voltage test is prohibited

11

PS 441 Directional Time-Overcurrent Protective DeviceConnection Example

7 PS 441 connection example

A

B

C

I>I>I>

Aux voltage VA H1

H2

H3

H4

H5

H6

H7

H8

H9

H10

H11

H12

X3353633323430293127282226252423201921

D1D2E2

X6235

X113

14

L+

L–

X11

23

45

67

8

A1

A2B1

B2C1

C2N1

N2

X19

10

11

12

A

B

C

N

L+L–L+L–

X115161718

Power Supply

Meas. Inputs

LEDIndicators

AusgangsrelaisSignal Inputs

PC Interface

PS 441

U1

U2

U100

T1

T2

T3

T4

T5

T6

T7

K1

K2

K3

K4K5K6K7

K8

1171

9.D

S4

##

##

ILSA Interface(option)

X7

X8

1172

0.D

S4

12

PS 441 Directional Time-Overcurrent Protective DeviceOrdering Information

Numerical directional time-overcurrentprotective device with inverse-timeand definite-time characteristics

Case for panel surface or flushmounting

4-pole measurement (A, B, C, N)

Phase-selective overcurrent timermodule and start signals

DTOC and IDMT modes, separatelyadjustable for phase current andresidual current modules

Time-lag high set phase current andhigh set residual current modules

Short-circuit direction determinationwith separate measuring systems forphase current and residual currenttimer modules

Tripping matrix

Optional latching of individualtripping criteria

Teleprotection through pilot wires

Possibility of reverse interlocking

Circuit breaker failure protection

Measuring-circuit monitoring

Operating data acquisition

Event counting

Acquisition of maximum short-circuitcurrent and running time data

Fault logging with real-time tagging

Fault recording (0,6 kHz, 4 s) of thethree phase currents and threephase-to-ground voltages

Self-monitoring

2 signal inputs (freely configurable)

8 output relays (freely configurable)

Integrated local control panel

12 LED indicators (9 freely configurable)

PC interface

ILSA interface (option)

Designs Order No. Extension No.(append to order no.

PS 441Case with 36 terminals 89441-0- ¨ ¨ ¨ ¨ ¨ ¨ ¨

Variants

Case prepared forpanel surface mounting 1panel flush mounting with cover frame 2

Nominal current InomPhase current input 1 A and residual current input 1 A 1Phase current input 5 A and residual current input 5 A 2Phase current input 5 A and residual current input 1 A 3

Nominal frequency fnom50 Hz and 60 Hz 2

Nominal auxiliary voltage for power supply VA,nom24 to 60 V DC and 110 to 250 V DC or 100 to 230 V AC 3

Nominal auxiliary voltage for signal inputs VI,nom24 to 250 V DC 3

Residual current modulewith sensitive setting range 1with normal setting range 2

ILSA interfacewithout 0for plastic fiber optical link 1for glass fiber optical link 2

Additional options

Labeling and documentation in English -598

Accessories

PC connector cable ( 2.5 m) 255 002 096

FPCC parameterization program 251 254 271

FPC control program 251 254 675

AFS

V.0

6.04

762P

DF/

0899

EN

· M

\M

Mod

ifica

tions

res

erve

d ·

Prin

ted

in G

erm

any

abcd

ALSTOM Energietechnik GmbHProtection and Control Unit · Lyoner Straße 44-48, D-60528 Frankfurt · Postfach 71 01 07, D-60491 Frankfurt · Germany

Phone: ++49 - 69 - 66 32-15 21 · Fax: ++49 - 69 - 66 32-25 48 · http://tde.alstom.com/p-c/afs

PS 441DescriptionFunctionsDesign Technical Data Signal ListDimensional DrawingConnection DiagramConnection ExampleOrdering Information