Supply, testing, installation and commissioning of true online Double conversion 10 kYAUPS system as per the following specification:

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Specification for 10 kY A UPS system with APFC (

i 1Capacity 10 kV A True -Online Double Conversion UPS system Iwith APFC systemp Input supply Suitable for 400± I 5% V, 3 phase, 50±10%Hz

L-13 Inlets Through MCB

1

4 Input Power factor & harmonic Input currents shall be sinusoidal.Correction For all types of loads (linear & non linear) above 25% of

Ithe rating:(1) Power factor ~ 0.95, usmg active power factor

l_correction system.(2) THOI < 8 %, using,active harmonic conditioners.

I) Rated Output Power 10 kV A at a power factor 0.8 lag or better6 Out put supply Rated 400V, Three Phase, 4 wire supply + earth;

Range:400 V ± I% line to neutral, static loads;Mean deviation for 0-100% step load response: less than I±3%.Recovery time to ± 1%: max 20 ms

7 Output Waveform and Pure Sinusoidal wave.frequency Voltage Oist0l1ion (THO): Less than 2% for linear load,

Less than 3 % for non-liner load50 ± O. 1% Hz free running and ± 2 % provision forsynchronized with mains

8 Outlets (output panel) Three Phase, 4 wire supply terminals Through MCB .with separate earthing terminal

9 Max. phase difference i/p - o/p < 10 degrees10 Crest factor rating 3: I or BetterII Overall efficiency (normal ~ 92% at rated load and not below 90% at 25% load.

mode)Bypass mode ~ 95% at rated load

12 Bypass Automatic bypass: Static bypass to provide anuninterruptible transfer of the load to the utility in case offailure of any of the system components ormalfunctioning and shall return the load automatically tothe UPS when the malfunction or overload is cleared.

I The switching time from inverter to reserve (bypass) andI vice-versa shall be of No-Break

The automatic by-pass switch shall be able to activatemanually by a switch/push button to test bypassoperation with a disabling featureThe maintenance by-pass shall be based on a manuallyoperated switch, which allows the electrical isolation ofthe UPS from the load \\hile still supplying the load

I 1314

15

Switchover voltage to inverter

Conversion TechnologyOverload

Minimum Short CircuitcapabilityDC side

directly from the mains.Transfer Time (in Sync Mode with suitable syn. controller) 1

to and from any internal bypass shall be no-break (less Ithan 5 ms). I

,

j< 320V and > 450VSinusoidal PWM with IGBT

UPS:120 % for 10 min, 150% for 1 min.Battery operation: 1SO°/cJ for 30 sec.200lYcJ for 5 C) clesBypass operation: 120% Continuous5*1 for invertor,20*1 for bypass~ 240 V; Higher voltage support with intelligent battery I

management system is always preferredSealed Maintenance free type of approved/accepted maketo NITC and in line with IS;'~EC/IEEE.Backup Capacity: 10 minutes at full load; Ampere-hourrating of the battery and no. of batteries selected shall besuitable for the specified back up time.Recharge time: in the order of 6 hours or less for 90%capacity;The battery charger output voltage shall be automaticallyadjusted in proportion to the ambient temperature of thebattery as per the battery supplier's recommendation toavoid over-charging;The end of discharge voltage of the batteries must be :load dependent in order to prevent deep discharging of 'the batteries whilst utilizing maxImum a\ailablccapacity;The rectifier/charger output current and voltage shal J belimited to the battery supplier's recommendation;Constant current charging under floating voltage then:constant voltage, support with intelligent battery'management system. After recharging batteries to fullcapacity, the charger will enter the rest mode to increasethe battery lifetime. Hence, continuous float charging ofthe battery shall not be allowed. IMains -Over/Under Voltage. Phase Failure, IDC Over/Under Voltage. Inverter Over/Under Voltage.Inverter Overload, Overheat. Overload trip with manualreset; Low battery trip with audible warning 3 minutesadvance; Battery Over charge. Battery Over current.reverse polarity fault conditions, Battery line fuse:Emergency power off; MCB -Built-in Soft Start:EMI and surge protection: For safety purposes the UPS I

shall be equipped with a backfeed protection contactor in I

I Indication/ LCD DisplayII

I the bypass circuit. This backfeed protection shall beinstalled standard inside the UPS cabinet.front panel display consisting of a graphical LCD display

I with back light: Mains Voltagc-['requcnc) -current input:I Output Voltage-frequene)-culTent:. ., .Baltery and DC bus Voltage: Run tlllle on maIns laIiure:Total run time: (ur Digital meters ror abll\ e items)Mains On. Invcrter 0 . Battery On Charge. MainsOver/Under Voltage. Phase Fail. Low Battery. DCOver/Uncler Voltage. Inverter Over/Under Voltage.Inverter O\'crload. Ovcrhcat. Load On IIl\ Cl1Cr.B) pass I

IOn. Manual Bypass On :

IName plate with minimum data:-Nal11c or

IManuj~lCturer. Model no. batch-scrial no. Datc ofmanufacturing. Rating shall be provided on outsicle underclear visible place.

21 Audible alarm with Mains failure, On battery. On':hypass. Overload. Lowindication/display & reset Battery, replacement of battery

22 Mounting On Castor wheels with standard leveling feet/"' Data Storage Sufficient to store history for minimum one \\eek or 200-., I

I

events: I24 Cooling Forced Air') - Ambient UPS & balter) -Suitable for continuous optimum-)

Ioperation (& storage) \\ithout any air conditioning underan ambient temperature 0--+5"C & 5 to 95%RH I

'26 Audible noise < 50 dBA at I meter from all sides in all modes. II

27 Protection degree IP 20 or better (lEC 60529)

28 Standard's Construction & Modular construction -IEC 62040-1, IEC 60950. EN I

Isafety 50091-1

I 29 Standards EM C IEC 62040-2 .EN 50091-2f---

I 30 Surge capacity IEC 1000-4-531 Harmonics standard IEC 61000-3-2/432 Performance and topology IEC 62040-3, EN 50091-3..,.., Electrostatic Discharge withstand a minimum 8 kY without damage and shall not.) .,

i affect the critical load.! 34 Software interface LCD screen. PC interface with software SNMP as anI option with all acccssories/interfacin!.!. Inecessary ~ II connectors/adapters. lor Monitoring. controlling and II shutdown of the UPS system from & local.I remoteI

compatible with Windows 2k,NT,Linex platform35 Warrantee Minimum 3 years for the complete installation36 Scope of supply Supply, wiring/cabling of UPS & baltery. battery stancl. I

I software interfacing, maintenance manuals, testing & icommissioning at NITC as per the relevant Indian I

I standard INITC norms Ii I-----J

Important:Offer shall be considered onlyif it contains:

(1) Technical specification (for each item given here I

111 serial number vise from 1-38) with supportingprinted manual or catalogue for technical items. I

for the model offered (attaching a copy or the:NITC specification indicating "comply"' IS not Iacceptable). Technical specifications /Dcyiations :if any shall be highlighted for each item quoted inserial number vise.

(2) Specify clearly the model, type, make, indicatingoutput power and current

(3) Full technical data of the battery offered and shallprovide calculation to show the number of cellsrequired and their capabilities which shall matchthe load requirement and the chargingcharacteristics of the UPS requirement beingoffered.(battery back up calculation with batterydischarge efficiency at different loads shall be Isubmitted) i

(4) List of institutions 111 India where the same I

modeUmake/rating is commissioned(5) Nearest service center to NITC shall be indicated.

Maximum response time shall be 24 hours for theservice call. The tenderer shall provide evidence andundeliake that round the clock on-call scn Ice I~available to attend to system' failure.

(6) Cetiificate of approved dealership from theoriginal manufacturer, if required

(7) AMC charges (after 3 year warranty period)without any conditions for 4th and 5th year shallbe separately specified in the offer

The item will be accepted only after the Institute is satisfiedthat it is strictly in compliance with the above technicalspecifications. The firm shall produce acceptance test icertificate along with the supply of equipment, for all theparameters for the UPS offered (same serial number andmodel) from Dept. of Electrical Engg., NIT Calicut. Or from ,CPRI, Bangalore. Corresponding test charges shall be borneby the firm.Rejection of the UPS for not satisfying the technicalspecifications or delay in supply /installation as per theabove conditions without valid and sufficient reasonssatisfactory to NITC, after placing purchase order will lead toblacklisting the firm and/or further penalty as decided by INITC.