WBIW/EE/MDMD/e-NIT- 20/2025-26/01

Opening the Transformer breather and refitting the same after changing the sillica jel including the supply of necessary gasket and silica jel.

Dehydration & filtration of power transformer oil to raise the dielectric strength to the value specified in IS including submission of test result. The cost includs man, machinary, and tools & plant hire charges to complete the at site as per direction of the EIC.

Maintenance and servicing of Dry type Cast Resin Transformer 11kv/.415 kv ( 1000kva/630 kva) , with engagement of suitable manpower and tools and tackles, testing equipments, air blowers etc as per manufacturer maintenance guideline including checking core and core assembly to ensure that HT tap links of all the three phase are at proper position and adequately tightened and locked, to check and ensure that all HT/LT connection nut bolts are fully tightened and locked, to check and ensure that the core, coil and its connections are thoroughly checked for any cobwebs, dust, dirt using air blower etc. Checking the enclosure perforated sheet/ mesh and clean thoroughly for cobwebs, dust, dirt to ensure adequate and proper ventilation of air through the same. Checking the Marshalling box , to check and ensure that Winding Temperature indicator (WTI) and Winding Temperature Relay (WTR), WTR alarm, trip contacts are in working condition and its temperature scanner/sensing thermisters are healthy and functional, to check and ensure that alarm trip circuit of WTI/WTR are working satisfactorily, also to check and ensure that HT/LT circuit breakers for its tripping on getting signals from WTI/WTR, to check WTI for its proper temperature setting for alarm and trip. Checking of HT/LT bushing and examine for dirt deposits and cleaning with non-fibrous, non fluffy cloth. Also checking of Earth resistance and to take corrective action if found more. Also taking note of winding temperature (WTI) hourly for at least seven days and submission of report mentioning the findings and test report for Insulation Resistance Test: HV-LV, HV-Earth, LV-Earth, Winding Resistance Test to check phase imbalance. (Note: The work shall be done on CRT, after isolation/ disconnection of HT/LT cables and ensuring that its HT/LT windings are solidly earthed at its main terminals. Also It must be ensured before closing that no metallic parts viz nuts, bolts, electrical cut wire pieces, cotton waste, spanners etc are left inside the enclosure/ on core/ on coils as this cause hazardous accident and failure of the CRT) :- job

Maintenance and servicing of Dry type Cast Resin Transformer 11kv/6.6 kv (2000kva/1600kva), with engagement of suitable manpower and tools and tackles, testing equipments, air blowers etc as per manufacturer maintenance guideline including checking core and core assembly to ensure that HT tap links of all the three phase are at proper position and adequately tightened and locked, to check and ensure that all HT/LT connection nut bolts are fully tightened and locked, to check and ensure that the core, coil and its connections are thoroughly checked for any cobwebs, dust, dirt using air blower etc. Checking the enclosure perforated sheet/ mesh and clean thoroughly for cobwebs, dust, dirt to ensure adequate and proper ventilation of air through the same. Checking the Marshalling box , to check and ensure that Winding Temperature indicator (WTI) and Winding Temperature Relay (WTR), WTR alarm, trip contacts are in working condition and its temperature scanner/sensing thermisters are healthy and functional, to check and ensure that alarm trip circuit of WTI/WTR are working satisfactorily, also to check and ensure that HT/LT circuit breakers for its tripping on getting signals from WTI/WTR, to check WTI for its proper temperature setting for alarm and trip. Checking of HT/LT bushing and examine for dirt deposits and cleaning with non-fibrous, non fluffy cloth. Also checking of Earth resistance and to take corrective action if found more. Also taking note of winding temperature (WTI) hourly for at least seven days and submission of report mentioning the findings and test report for Insulation Resistance Test: HV-LV, HV-Earth, LV-Earth, Winding Resistance Test to check phase imbalance. (Note: The work shall be done on CRT, after isolation/ disconnection of HT/LT cables and ensuring that its HT/LT windings are solidly earthed at its main terminals. Also It must be ensured before closing that no metallic parts viz nuts, bolts, electrical cut wire pieces, cotton waste, spanners etc are left inside the enclosure/ on core/ on coils as this cause hazardous accident and failure of the CRT) :- job

Following tests are to be performed for the 11 kv VCB, 4 panel (1 no incoming and 3 nos outgoing) and test report to be submitted in tabular format in triplicate mentioning the instrument used with calibration certificate. I Electrical Test: Insulation Resistance Test (5 kV): Phase-Phase, Phase-Earth. H.V test of 4 nos VCB Panels ii CT/PT & Metering Compartment IR test for CT/PT secondaries. Polarity & ratio checks. Check wiring tightness, PT fuses. iii Busbar System IR test of busbars. Inspect for dust, corona marks, rodents. iv Cable Terminations Inspect heat shrink/ epoxy terminations. IR testing of cables. Tightness check & thermography. v Transformer IR & H.V test. For 3 nos transformer vi Earthing System Earth continuity inside panels. Earth electrode resistance. Check earthing of CT/PT frames and panel body.

Taking out samples of oil and carrying out chemical test of oil in respect of its acidity test through reputed test house and submission of Test Result.

Takingout sample of oil from power/voltage transformer, OCB etc. & testing their dielectric strength according to specification and submission of test result.

Servicing and overhauling of 400 AMPS/500 AMPS/ 630 AMPS /1250 Amps,11KV/ 6.6 KV. V.C.B./ V.C.U. dismantling the rack from the housing, opening the components, necessary cleaning of the component, carbonised portion, changing of rubber gasket, defective parts, cleaning of all mechanism parts and lubricating the mechanism, opening of C.T. & P.T.S., busbar spout assembly cleaning the same and insulated properly by supply of C.T.C. etc. and refitting all the parts to its original position by making all relevant electrical connection, panel wiring etc. for satisfactory & operation.

For Incomer Feeder: Each relay set consists of following relays MICOM P11 - 1 NO. CGL 14N/C- 1 NO VAX31 - 1 NO, VAA-33-1NO VAMP-31 - 1 NO, VAJH-13-1NO

For motor protection: Each relay set consists of following relays Motor protection relay - 1 NO. VAJH 13 - 1 NO.

Servicing and overhauling the Automatic star delta starter for 120 -180 HP Motor after opening all components, electric Timer, bi-metal relay etc. & fitting fixing the same after same plate servicing and overhauling testing as required as per direction of EIC (Spares will be supplied by Deptt.) (Spares will be supplied by Deptt.) required as per direction of EIC (Spares will be supplied Each Complete servicing and overhauling and necessar)

Complete servicing and overhauling and necessary repairing of DTH 250 Amps MCCB (L&T Make).

Servicing and overhauling 2500 / 1600 /1250/1000 Amps A.C.B. after withdrawing the breaker from its track, complete servicing the breaker, cleaning, moving and fixed contacts and adjustment incl.mechanical lever, greasing, oiling etc. and disconnection of the armoured cable and cleaning the surface with carbon tetra chloride, marking cloth, emery papers and applying of petrolium jelly etc. to the socket terminals and taping with PVC tapes and re-connection of the same as per direction of E.I.C.

Testing, commissioning of Previous installed 3Ph 25.4 A, 50 HZ, 6.6 KV, 290 KVAR DELTA connected capacitor including supply of off time delay timer (L&T/ ESPL) and miscellenous equipement for control missing and testing the Capacitor bank. (at 3rd ACPS)

Supply of Electronic Timer type ST100, 3-30 Second / 12-120 Second (Cat Ref . No-ST803280000, L K make)

Supply of 3 pole Thermal over load Relay type MN-12L, Relay range- 60-100A current rating

Supply of 3 pole Thermal over load Relay type MN-12L, Relay range- 90-150A/135-225A/180-300A current rating

Tripping relay VAJ (Model No VAJH13Y F0751BBA) VX 110-125 V (ALSTOM/Areva Make

power pack incomer 110V AC, outgoing 110V DC capacity 150VA max .

power pack input 230vV AC outgoing 110V/30V DC DC capacity 150VA max . Va max 300

MICOM P122(SCHNIEDER)

Supply of moving iron type analog AC ammeter (accuracy class 1.5), model-SMI-96 of following range 0 to 200A

Supply of 0 to 600V range moving iron type analog AC voltmeter(accuracy class 1.5), model-SMI-96

Supply of 3Ph LED Ammeter Cl 0.5

Supply of 3Ph LED Voltmeter Cl 0.5

Supply of 3 pole MCCB Thermal Megnatic release type DN3-400 N, 250A - 320A current rating

Supply of 3 pole power contactor type MNX250, 250A current rating

Supply of 3 pole power contactor type MNX300, 300A current rating

Supply of Capacitor bankheavy duty(TYPE LTBCH) 25 KVAR (L K make)

Supply of Capacitor bankheavy duty(TYPE LTBCH) 20 KVAR (L K make)

15A flushed type 3 pin Plug Socket

supply & fitting fixing of 3 phase submercible pump controller ( with single phase preventer) , Type - MU - G 15 FASD , Max submersiable pump rating at 3ph , 415 v 50 HZ , HP -15 kw -11 relay range- (A) -13 -22, Cat no- CS94091SODO, make - Lauritz knudsen.

Dismantling all the terminals of the motor control pannel & Checking all the sockets on both side of pannel, starter and Capacitor Bank including Tapping as required and Re-Connection of the Motor Starter terminals after Servicing of the pannel and Complete Testing as per direction of E.I.C. (capacitor)

3.5 core 150sqmm cable

3.5 core 150sqmm cable

HRC Fuse 250A (L&T)

4A, SP, MCB (L&T make).

6 A DP MCB. (L&T)

22.5 mm. dia LED indicating lamp

Supply TMC501 Conventional industrial batten Philips LEDtube, model no : TMC 501 P 1xT-LED 22W P3242

Make:Panasonic, 70 Watt

Exhaust Fan/Stand Fan (24" or 60 cm. dia sweep)

185 Sqmm 3.5 -core

150 Sqmm 3core

For 3.5 Core up to 185Sq.mm

For 3 Core upto 150Sq.mm

3½ core 185 Sqmm cable

3½ core 150 sqmm cable

Laying of cable above 3½ core 90 sqmm and upto 3½ core 150sqmm on wall/surface including S & F MS clams with earthingattachment in 2 x 10 SWG GI (Hot Dip) Wire, making hole etc. as necy., mending good damages and painting

One coat of red lead/Zinc chromate priming

1st coat of synthetic enamel paint over the primer

2nd coat of synthetic enamel paint over the 1st coat

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