Replacement of Faulty CT PT and TOD meter and other Allied works in 1x250 KVA oil cooled indoor transformer substation at TE Vellayambalam

Amount

SITC of Outdoor type Oil filled 11 KV CT PT unit comprising of 3 Nos. Current transformesr (copper wound) of 5/5 A ratio, Class 0.2 S accuracy and having burden 10 VA, and 1 No: 3 phase, PT of rating 11kV/110V, 25 VA burden, with 0.2 Accuracy (copper wound) suitable for metering in 11 kV HT supply including removing the existing faulty CTPT unit, shifting and stacking of the same in convenient location inside the TE compound as directed by E-in-charge, testing /calibration of new CT PT units in the meter testing unit of KSEB including to and fro transportation for testing and after testing/calibration, fixing the same in the existing out door structure with suitable modifications etc as reqd. (Make: Any KSEB Approved make). (Note: All laisoning works with KSEB authorities, payment of necessary fees for testing at TMR, fees for inspection etc. are included in the scope of this work and shall be agency's responsibility and nothing extra shall be paid by BSNL on that account)

SITC of Outdoor type Lightning Arrestor suitable for 11 KV on the existing Pole structure, i/c removing the faulty one, making connections etc as required.

Providing '0' Guage copper wire in HT structure after removing existing one and connecting between CTPT unit and both incoming and out going DO fuse units.

Supplying and testing of TOD meter suitable for 3P 4Wire, 11KV/110V(L-L), -/5A of class 0.2S accuracy and DLMS compatible for the metering arrangement in the existing metering cubicle for replacing the old version meter etc as required (Make:L&T, Model: ER300P/similar superior KSEB approved make)

S/F test terminal block suitable for TOD meter with 3 phase 4 wire system , i/c providing 4 nos 16A bakelite fuse with 2A/4A HRC fuse, and providing FRLS PVC insulated 4 sqmm Copper wire having RYBN colour code (total 5 mtrs qty of wire ). ( All above suitable for 11KV TOD meter connection purpose)

Supplying and laying 12 core 2.5 sq.mm PVC insulated PVC sheathed copper conductor armoured cable on surface of pole/in existing pipe/in ground including removing the existing faulty cable making end termination with suitable glands and making connections etc as required.

Supply and fixing sealed HRC fuse 2/4 A with fuse base for CT/PT unit (3 nos)

Oil filtration and dehydration of transformer oil in oil cooled indoor 1x 250KVA Transformer (GEC Alsthom Make, 1998 Installed) and HT OCB panel ( Biecco Lawrie Make , installed on 1998) comprising of 1 no isolator,1 no OCB and oil filled PT including bringing the dielectric strength with the required limit as per latest standards and furnishing the test report for the equipment as per following details

Oil filtration of transformer oil by following standard procedure including submitting test value result as per standards etc as required i/c hiring charges of filteration unit ( oil filtration of Transformer and circuit breakers to be carried out)

Supplying and filling of transformer oil of superior quality for top up purpose etc as reqd.

Supplying silica gel after removing existing one i/c replacing breather etc as reqd

Painting of out door substation yard (Except transformer/CTPT unit) which includes poles, cross arms , MS joist, MS channels, angle iron and the out door metering kiosk and all metallic supports, weld mesh fencing with height max 2.8 mtrs (appr) (Fencing area shown below) with three side fencing and one side wall) etc, after cleaning and scrubbing the surface with metalic scrubber and emery paper to remove rust and applying one coat of anticorrosive metallic primer and two coats of anti corrosive metallic aluminium paint of superior quality for metal parts and for cement areas; apply 2 coats of weather proof emultson paint after washing and cleaning the surface, . Minor patch work of supports, tightening of nuts etc to be done if reqd. (The work should be done by taking necessry shut down by liasoning with KSEB and to be done with all safety precautions with minium shut down time.)

Out door Sub station yard with 4 poles and fencing area 6Lx7Bx2.8H mtrs

Cleaning the substation yard by removing grass, creepy vegetations, cutting down of shrubs, cleaning in and around 1 mtrs surrounding the substation switch yard, levelling the stone aggregate,removing unwanted items from this area to a location directed by Officer in charge etc as required( approx 42 sq.m)

Supplying and laying 40mm Stone agrregate to compensate the level inside the switch yard i/c transportation charges

Servicing HT switch gears on the 11KV outdoor structure I/c taking shut down from KSEB authorities,checking cleaning and tightening of the jumper connections, cleaning all the the contacts with emery papers, lubricating the moving mechanism (Grease/oil of suitable quality & grade) replacing the nut bolts/screws, washers , repairing the handle of AB switch, replacing damaged DO fuses and its assembly as reqd etc complete as required.(Agency has to co-ordinate & make arrangement to get shut down from KSEB)

Testing for IR value of the installations including HT pole structure elements ,HT cable, HT panel and transformers HT and LT side ,MV cable etc by meggering with 5 KV megger in case of 11 kV installations 500 V meggar in case of MV installations I/c physical testing, disconnecting the cable from supply/load & testing & submitting the results to the Engineer-in-charge etc, complete as reqd. (The meggering shall be done in the presence of JTO/SDE(E))

Servicing of 11 KV oil cooled indoor sub station and OCB with switch of following rating, i/c cleaning the entire panel & transformer, for removing the dust, rust, oil and moisture contents, tightening nuts and bolts of the Bus bars, cable terminals and spouts, and improving the value with a hot air blower after cleaning with CTC (CarbonTetra Choride )/ standrad cleaning agents providing additional insulation sleeves for HT Bus bars whereever required, checking and correcting the operating mechanism of OCB, meggering the IR value and impoving it if required, closing of opening if any to avoid rodent entry, cleaning and tightening of earth points, identifying the earth pits, minor patch work of pits, painting and sign wrtiting of earth pits including earth bus bar and over all cleaning of sub station room to avoid dust accumulation including removing combustible materials as directed by site-In-Charge etc. complete as reqd. 1x250 KVA 11KV ( GEC- Alstom Make, 1998 installed) oil cooled indoor Transformer 11KV OCB unit (Biecco Lawrie, 1998 installed) 1x400A rating Isolator- TOS Type & 1x400 A Breaker PDB/A and ensuring safety trip as reqd Total of all above

Servicing of MV panel with switches and ACB by cleaning the entire panel by removing the dust particles using blower, checking and tightening the bus bars, checking the tripping ,charging and ON OFF mechanism of ACB,cables and switch terminals, taping wherever required i/c withdrawing the fuse units from switches cleaning and removing the carbon deposits and applying the terminals with petroleum jelly, attending minor repairs of switches ,replacing the faulty indication lamps,control fuses, beadings, sign writing the switches as per present loads etc. complete as reqd. (Panel size 2.2 x 2.6 x 1.00m approx, Total switches 14 Nos And ACB 800 A 1 no make-GEC Alsthom MPACT ).

Supplying and providing one pair of 11KV grade hand gloves as per standards as reqd.

Servicing the 30KVAR capacity APFC panel I/c checking the replacing minor spares like push buttons, LED lamps etc. complete checking the cable connections, bus bars etc. for any loose contacts, tightening all nut bolts checking the performance of the APFC relay cleaning inside the panel with air blower, cleaning all the contacts etc. as required.

SITC of HRC fuses of the following rating for replacing the faulty one in the existing MV panel as required. (Cylindrical / Din Type)

ELECTROTEK ENGINEERS PVT LTD