REPAIR MAINTENANCE OF VCBs RMUs DISTRIBUTION TRANSMITTER AND ALLIED WORKS AT AF STN PURNEA UNDER AGE I AF PURNEA

Amount

M & L for disconnecting and taking out HT VCB/RMUs panel of capacity 400/630Amp, 350MVA (MES No. & Location as Per Engr-in-Charge) and to carry out following Periodical Maintenance (i) Overhauling of Spring charge unit including cleaning & removing of scales, soot or any hydroscopic layer accumalated on copper/aluminium bus bar using proper chemical cleaning reagents like CRCs (ii) Checking nuts,bolts, make break operation both mechanically and electricaly smooth including greasing of all moving/ fixed contact,nut & bolts (iii) Checking contact resistance, Internal control wiring, repairing/replacing heating coil removing moisture for all the feeders, (iv) Servicing of Spout insulators safety shutter for effective covering by automatically open/close while draw in/draw out operations, Checking and tightening control wiring and rectifying the defects if any.

(v) cheking of earth fault and over current relays testing of relays with the help of relay testing kit (boosting Kit) and resting of relays as per desire load current reconnecting the cables ,including calibaration of relays. (vi) Checking of tension spring and adjusting for proper tripping and functioning and replacement of U/S parts if required and testing complete for tripping all as directed by Engineer-in-Charge. Note: (i) Spares required for replacement will be paid and measured separately. (ii) Calibration to be carried out by the OEM/ rep of manufacturer of respective VCB/RMUs

M & L for replacement of under mentioned unserviceable items (to be incorporated against item No. 1 :-

LED Indicator lamp of voltage Range : 110A - 110 VAC 110D - 110 VDC 240A - 240 VAC 220D - 220 VDC

S&F in repair/replacement of spring Charging Motor suitable of 11 KV VCB 110 V-230 Volt AC supply for the opening and closing of contacts complete all as per sample at site and directed.

S&F in repair/replacement of vaccum intrupter bottle as per existing capacity of VCB 110 V-230 Volt AC supply for the opening and closing of contacts complete all as per sample at site and directed.

S&F in repair/replacement of space heater 60 watt 230 Volt AC supply with thermostat complete all as specified and directed.

S&F in repair/replacement of digital Voltmeter (0 to 12 KV size 96x96 mm class 0.5, PTR 11000/rt3/110/rt3 complete all as specified and directed.

Supply and fix three phase over current and earth fault auxillary relay Suitable for CT Secondary 1 Amps or 5 Amps,Aux Supply 77-250V DC/AC (230VAC) suitable for existing breakers including taking down old U/ S relay make: Ashida/Crompton/Ariva or equivalent

Supply and fix triping coil DC 24/110 Volts suitable for existing breakers complete all as specified and directed.

Supply, installtion, commissioning and testing 11 KV, single phase, resin cast indoor potential transformer of ratio 11KV/110V, accuracy class 1.0, burden VA 200/phase, highest system voltage 12 KV, insulation level 28KV, lightning impulse 75 KV, voltage factor 1.2 contineous and 1.9 times for 8 hours for with suitable enclosure all as specified and as directed,including taking down of U/S PT complete all as specified and directed. Make: Crompton, Type : PT-005,Burden Vally.

Supply, installtion, commissioning and testing 11 KV, 3P/3W,50 Hz, 800 Amps, resin cast, enclosure type, indoor CT of ratio 80-40/1A, accuracy class 1.0, main CKT (STC) 13-1KA (3 Sec) ,E/CKT - 13-1 KA (1 Sec)200/phase, highest system voltage 12 KV, insulation level 28KV, lightning impulse 75 KV, with suitable enclosure all as specified and as directed. Make: Crompton, Type : PT-005,Burden Vally.

Supply and installation of power pack unit of Input 110VAC 50 C/S,3 phase,Out put 110,Cap-300, make Crompton safety devices complete suitable for existing breakers including taking down old power pack unit all as directed

M & L for Painting of transformer complete incl conservator tanks, fins etc with two coats of smoke grey ISI marked synthetic enamel paint with spray machine complete all as directed & shown by Engineer-in-Charge including preperataion of surface by cleaning agents by spray painting machine & writing MES No, SM Nos, capacity, Serial No, date of dehydration with black japan paint etc of undermentioned capacity :-

Transformer capacity up to 250 KVA

Transformer capacity from 250 KVA to 500 KVA

Material and labour for Earthing in repairs with galvanised steel earth plate electrode 600x600x6mm thick burried directly in ground, earth pit not less than 2.25mtr deep below ground level with top edge of the plate not less than 1.5mtr below normal ground level connected to GI earth strip of 32x6mm by means of nuts,bolts, checking nuts, washers of galvanised iron or steel all as shown in electrical plate No.3 of MES SSR part-I connected to earthing test point including excavation/earth work in any type of strata, watering pipe with funnel, PCC chamber with PCC cover slab without GI protection pipe all as specified and directed by Engr-in-Charge.

S&F in replacementfor Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required for 32x6 galvanised iron strip using porcelain clit/post insulators including GI protection pipe of suitable size , complete all as specified and directed.

Taking down the HT cable connections from the 350 KVA trolly mounted transformer kept at Domestic pump house tranporting carefully the entire unit to MRS poawer house and connecting the same to Exisiting VCB panel with all necessary connectors,fitting and fixture testing and commissioning of the entire system for its satisfoactory operation complete all as specified and directed by Engr-in-charge. Note: 1. Necessary T&P/Vehicle cost to be included in quoted rate. 2. Labour cost for fixing of required spares in deemed to be included in the quoted rate.

Disconnecting the distribution transformers outdoor / indoor type from HT/ LT system and opening carefully at site from existing position by draining out transformer oil upto HT/LT boxes for rectifying the leakage by replacing the unserviceable spare parts of capacity upto 250 KVA transformer, refilling the transformer oil and complete assembling after repairs including testing for any oil leakages and connecting the HT/ LT system after the leakages have been rectified and tested on available electric load. Note :- Defective parts replaced will be measured and paid separately as "Supply only" under respective items here in after.

Disconnecting the distribution transformers outdoor / indoor type from HT/ LT system and opening carefully at site from existing position by draining out transformer oil upto HT/LT boxes for rectifying the leakage by replacing the unserviceable spare parts of capacity from 250KVA to 500 KVA transformer, refilling the transformer oil and complete assembling after repairs including testing for any oil leakages and connecting the HT/ LT system after the leakages have been rectified and tested on available electric load. Note :- Defective parts replaced will be measured and paid separately as "Supply only" under respective items here in after.

Supply only LT bushings with brass studs of existing specification at the office of Engineer -in-Charge complete all as specified and directed

Supply only top cover gasket set at the office of Engineer -in-Charge complete all as specified and directed

Supply only radiator flanged gasket 6 mm thick at the office of Engineer -in-Charge complete all as specified and directed

Supply only HT bushing with studs 11 KV of existing specification at the office of Engineer -in-Charge complete all as specified and directed

Supply and fix in replacement expulsion vent diaphragm of suitable size to match with the existing complete all as specified and directed

Supply and fix in replacement of breather assembly transparent plastic body with top and bottom portion pressed with metallic cover, filled with silica gel blue in colour and suitable for fixing on existing pipe of size 15/20/25 mm dia with suitable reducers/connectors etc as per site requirement /capacity of transformer. Note :- Rate quoted shall be deemed to include the cost of modification if any required to fix on existing MS Pipe.

M&L for taking down transformer oil level indicator assembly from conservator tank of transformer upto 500 KVA capacity from position for making visibility of oil level by lowering oil level in conservator including cleaning thouroughly, replacement of gasket and acrylic sheet, reassembling in position, refilling the removed oil all as specified and directed by Engineer-in-Charge.

Supplying and laying synthetic Rubber insulated mats 3 mm thick for voltage upto 11 kv for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m complete all as specified and directed

Filtration & de hydration of transformer oil to achieve the test results as per IE rules with filtration plant including topping up of transformer oil. Note : a) the filtration of the transformer oil is to be carried out at different sub stations of the area b) the report before filtration & after filtration to be submitted by contractor in the approved format by licensed agent. c) the filtration is to be carried out on line ie without switching off supply. d) Transformer oil for topping up will be measured under respective item of Sch A.

Supply only Transformer oil confirming to IS 335 Std for topping up in distribution transformer duly filtrated under respective item of Sch A Make Power Oil/ Savita Oil or equivalent approved make.

M&L for earthing with copper earth plate electrode 600 x 600 x 3.15 mm thick burried directly in ground vertically to a depth of not less than 2.25 mtr below ground level connected to copper strip of size 20 x 3 mm as earthing lead means of nut, bolts and washers made out of galvanised ireon mild steel and 40 mm dia GI pipe "light grade" for protection of earth lead and connected to contoll board or main switch or as directed by Engr -in-Charge including earthing pit in PCC (1:3:6) type C1 pre-cast cover RCC cover lab of size 300 x 300 x 100 mm with one handle made out of 8 mm dia round bar 20 mm dia GI pipe light grade for watering funnels , wire mesh and provided charcoal or coke of alternative layers of 15 cm including necessary earth work complete shown in electrical plated No 3 and tesing complete. NOTE : The earthing pit should be provided with proper earth pit and pit cover. Pit cover should be painted with synthetic enamel paint of approved colour and pit number to be marked on a GI plate above 45 cm from GL as per colour code followed in AF Station.

S&F in replacement for Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required for 20x3 copper strip using porcelain clit/post insulator including brazing if required & GI protection pipe of suitable size complete all as specified and directed.

Supply & Fixing danger notice plate of 1.6 mm thick mild steel sheet, vitreous enamelled white, with letters, figures and conventional skull and bones in signal red colour and fixed with MS clamps, bolts and nuts of approved size, for HT, 25 x 20 cm size complete all as specified and directed

M&L for disconnecting electrical connections from HT / LT terminals and earthing connections of faulty double copper wound, oil cooled transformer of capacity of 200 KVA from existing substation at domestic & technical area transporting from site to workshop for repair / replacement by dismantling carefully and removing faulty / burnt parts, winding, drain out oil in barrel for reuse, rewinding including re-insulation of HT/LT coils with super enameled copper wire with equal gauge of existing copper wire, cleaning of core / tank, changing air breather assembly with pipe, . oil level indicator, defective HT/LT bushing with terminal connection and reinstallation with complete connection as required and directed by engr-in - charge. The repairs to the Transformer shall include :- a) Lifting of damage limb (coil assembly). b) Separate HV and LV coil. c) Measuring all parameters with actual d) Making new coils as per original. e) Installing of new coil assembly. f) Connection of all connecting leads as per original dimension g) Assembly of core. h) Replace of all gasket and oil seal with new one of reputed make i) Full assembly of transformer j) Testing complete shall be carried out as per IS 2026 (Part 1): 2011 at site in the presence of E-in- Charge/ JE and the cost of testing shall be deemed to be included in unit rate quoted against this item. (k) The IR value of the dried winding before inserting the core in the shell shall be measured and recorded.as directed by Engr-in-charge

NOTE a) Rates of above spares deemed to be included in the quoted rate. Consumable items such as cotton waste, CTC, wire brush etc also included in the quoted rates b) Comprehensive Test certificate along with warranty to be submitted by the Contractor c) Repairs to the transformer will be carriedout by the Contractor after completion of Board convened by the accepting Officer d) Transportation charges for transportation of transformer from site to workshop and after repair, workshop to site shall be borne by the contractor and cost thereof including tools and plants shall be deemed to be included in the unit rate quoted for this item. e) The contractor shall attend the complaint immediately. and shall report the Engr-in-Charge/JE( E/M) after completion. f) Penalty of Rs 5000.00 per Job shall be applicable to the contractor if the complaint is not attended immediately. Note that this penalty is exclusively other then the condition 56 of IAFW - 2249 and shall be treated as interim condition of the contract and shall be enforce above as and when delay in individual job is noticed and no claim whatsoever on this account shall be entertained by the Deptt.

All as per Item No. 35 but capacity 63 KVA.

Surface excavation in hard/dense soil including sand and pebbles for removing vegetation and bushes and not exceeding 30cm depth in Power houses / sub station area complete all as specified and directed

Supply, spread & levelling aggregate of guage/ size 40 to 80 mm size around the transformer, HT two pole structure, HT four pole strcture etc in the sub stations complete all as specified and directed

M & L for repair of ATS of capacity 630 Amp by removing the defective contactor and relay including checking of control wiring and making serviceable including disconnecting all cable connections and re- connecting the same after making it serviceable as specified & directed.

Disconnecting and taking out old u/s Float Cum Boost Charger complete from existing VCBs and supply, install, testing and commissioning of Float Cum Boost Charger with Battery (Qty- 05 of capacity 110 AH) Backup of capacity 30 A, 24 V, input Voltage AC, 50 Hz, 230 Volt +/- 20% and out put Voltage 110 Volt, DC having back-up capacity of 08 hrs for the requirement of minimum 10 times of ON/ OFF operation suitable for VCB panels, in sheet steel enclosure made out of CRCA sheet of 2 mm thickness duly powder coated, indoor type, weather/ vermin proof, complete with the following items, including making connection with VCB using PVC insulated copper conductor cable of suitable size all as specified and directed :- (a) Over voltage protection -1 No (b) short circuit Protection -1 No (c) Over load protection on the output side -1 No (d) Out put on/off Switch -1 No (e) Indication for charger on, out put off, Battery operation, over load & output on. (f) Input/ Output terminals (g) Input fuse -1 No. (Note : Connection with VCB shall be carried out by the authorised service Engineers Of VCB only ). Make : Baid Powe Services Pvt Ltd. at Take Over Point (MRS).

Schedule of Credit

M/S. R.K. ENTERPRISES (BID ID -3155101)

M/S MBS TRADING CO (BID ID -3156642)

M/S Ali Trading Co (BID ID -3156696)