SPECIAL REPAIR TO REPLACEMENT OF 02 X 1.6 MVA, 33/11 KV TRANSFORMER AND VCB AGAINST BER UNDER GE (W) JABALPUR

Amount

Supply, installation, testing, and commissioning Power Transformer step down, out door type SCADA compatible of capacity 2500 KVA, HT 33 KV/11 KV, 3 phase, 50 cycles AC with On Load Tap Changing arrangements with remote control panel operation on 33 KV sides to vary secondary voltage from (+) 10% to (-) 10% in steps of 2.5 % (8 steps, 9 positions), % impedance should not be less than 6.25% at normal tap & MVA base at 75˚c including suitable marshalling box and HV terminals 3 Nos outdoor porcelain bushings (Anti-fog type) with socket and LV terminal outdoor porcelain bushings (Anti-fog type), connectors of copper to connect the transformer with HT XLPE Power cable of size 120 sqmm x 3 core with aluminum conductor and LV side additional Neutral with one No. solid porcelain type out door bushings (Anti-fog type) with sockets on the transformer lid for earthing purpose complete in all respects with standard accessories and fittings conforming to IS-2026, HV ( Primary) side delta and LV (Secondary) side star connected including control panel of Transformer. The salient features of the transformer shall be as under :-

(a) (i) Transformer shall be Dyn - 11 vector group oil immersed naturally cooled, double wound copper winding core type, Radiator cooled MS tank complete with first fill of transformer oil as per IS -335 with ONAN cooling system. (ii) The temperature of oil shall not rise to 50˚c & winding temperature shall not rise to 55˚c over ambient temperature of 40/45˚c. (iii) Transformer shall be capable of withstanding for two seconds without damage to any external short circuit, with the short circuit MVA available at the terminals. (iv) Material of HV & LV Conductor shall be of electrolytic copper type. (v) Anticipated continuous loading of windings (HV / LV) shall be of 110 % of rated current & Anticipated unbalanced loading shall be around 10 %. (vi) Transformer shall be painted with two coats of synthetic enamel paint with two coats of expoxy paint as per IS -632 and include following standard fittings:- (i) Rating and diagram plate alongwith levels where ever necessary. (ii) Earthing terminals - 2 Nos. (iii) Lifting lugs. (iv) Thermometer pocket with thermometer. (v) Air release hole with plug.

(vi) Oil filling hole with plug on & including Conservator tank with drain valve and plug. (vii) Prismatic type oil indicator on one side of conservator tank with minimum and maximum oil level marking. (viii) Dehydrating breather - 01 No (ix) Oil conservator with drain valve and plug. (x) Sampling valves, top and bottom. (xi) Under base with flat treaded bi-directional rollers. (xii) Drain cum bottom filter valve with plug. (xiii) Top filter valve with plug. (xiv) Pressure Release Valve with trip contact. (xv) Jacking lugs and hauling holes. (xvi) Inspection cover. (xvii) Detachable radiators with shut off valves between radiators and tank. (xviii) Radiator with air release hole and plug. Oil drain hole with plug and lifting eye all as per Manufacturer's standards.

(xxi) Indoor floor mounted remote control cubicals (RTCC Panel , AVR relay) with rear accessories on HV side to vary secondary voltage as mentionrd above with wiring and followings :- (a) Remote tap position indicating meter digital type. (b) Tap change in progress signal lamps with belt (c) Raise / lower push buttons for remote operation (d) Inside illuminating lamp with door switch. (e) Supply on signals. (f) Suitable class CTs for 3 core to suit full load on transformer. NOTE :- (a) Single limb IMPULSE TEST AND HEAT RUN TEST shall be carried out at Manufacturers factory or approved laboratory or copy of report for similar capacity transformer (not older than 02 years) shall be submitted and the cost for the same is deemed to be included in the quoted rate. Necessary Certificates shall be submitted by OEM before dispatch of Transformer. (b) Transformer shall be inspected by inspecting officer nominated by the Accepting Officer at Manufacturer's premises and all desired test shall be carried out in accordence to IS: 2026. (c) Site testing : Insulation resistance ,oil temperature alarm trip, Winding temperature alarm and trip, Buchholtz relay alarm and trip, Low oil level alarm, testing of annunciation systems by auxiliary relay triping of transformer, Polarity marking and phase sequence, Ratio test, vector group, magnetising current, dielectric strength and filtration, if required, should be carried out.

(d) Armoured control copper conductor cables of required size , length and core for making connections and functioning of all control devices / panels / accessories shall be provided by firm all as required at site. The cost of the same is deemed to be included in the rate quoted by the Contractor. (e) Foundation and civil works as per Manufacturer's recommendation shall be provided at 'NO' extra cost to the dept. (f) Earthing shall be measured and paid for separately. (g) The stud for neutrals shall be of sufficient length to fix 2 Nos strip earthing. (h) Cost of cable entry box on 11 KV side compatible for 1 run of 85 to 120 Sqmm, 3 core HT XLPE cable (E) is deemed to be included in the item rate. (j) Routine test as per IS 2026 shall be conducted and test certificate shall be furnished. (k) The quoted price shall be deemed to be inclusive of connecting of trip contacts of buchholtz relay and temperature indicator of windings & oil to the trip coil in panel board. (l) Cost of initial oil filing with Transformer oil having dielectric strengh not less than 70KV at 2.5mm gap is deemed to be included in the item rate.

(m) RTCC and AV shall be suitable for automatic voltage regulation with master follower scheme with tap position indicator as per tap indication in the OLTC mechanism, RTCC should also be provided with contol gear in respect of fan ON/OFF indication, auto and manual control switch AC supply on and tap changer in progress indication lamp tap struck indication and alarm. (n) The erection of the transformer shall be done under the supervision of Manufacturer's authorized Representative. Certificate in this regard shall be sumitted by the contractor duly signed by authorized representative of manufacturer and Engineer-in-Charge. (o) The design of transformer shall be in accordance to relevant clauses specified in PS . The accessories /devices not mentioned here but necessary to provide as per relevant standard , shall be provided by the firm without any extra cost. (p) The core (boltless type) shall be constructed either from high grade, non-aging Cold Rolled Grain Oriented (CRGO) silicon steel laminations conforming to HIB grade with lamination thickness not more than 0.23mm to 0.27mm & maximum flux density in any part of the cores and yoke at normal voltage and frequency shall not be more than 1.69 Tesla. Each lamination shall be insulated such that it will not deteriorate due to mechanical pressure and the action of hot transformer oil.

Supply, installation, testing and commissioning HT 33 KV outdoor type Non-extensible SF6 insulated Fixed type manual Vacuum Circuit Breaker 25 KA for 3 phase, 50 HZ, 1250 Amps as per IEC 13118/IEC-56 including indoor type C&R panel confoming to standard IEC 32271-100, totally enclosed in metal clad enclosure of suitable size with internal wiring etc. All live parts, bus bars, LBSs connections shall preferably be enclosed in one tank to avoid multiple inter connections & sealed for life robotically welded non magnetic and non ferrite grade stainless steel tank Grade SS-304 of minimum thickness 2 mm having IP67 degree of protection filled with SF6 gas as insulation with leakage rate less than 0.1% per year tested as per IEC 62271-200. also the VCB Switchgear) shall be type tested for internal arc test of 25 KA/1 sec AFLR as per IEC62271-200. Also Manufacturer shall submit type test reports for same. The unit shall have front cable entry for ease of installation and shall have site replaceable bushings for ease of troubleshooting during breakdown. VCB should be complete with all accessories such as VPIS, cable supports for cable terminations, mechanical indications for load break switch ON/OFF, Manometer as per IEC standards 62271-200, 60056,60129, 60265, 60298, 60420, 60529 and 60694. Altitude of installation up to 1000 mtr as per IEC 60120.

(ix) Cemophore 110 volts DC - 01 No. (x) 12 Window display for OTI, WTI, Buchholtz, trip and alarm etc - 01 Job. (xi) sufficient Nos of push button and indication lamp LED type as required for each independent operation with back up Fuses as under (a) Red - Breaker Off (b) Yellow - Spring Charged (c ) Yellow - Auto Trip (d) Green - breaker ON (e) Yellow - DC Supply fail (f) Red - AB Switch (g) Green - Trip circuit Healthy (xii) Illumination lamp with holder operated with door limit switch, test terminal block, space heater, thermostat 30 to 90 degree centigrade, toggle switch for independent operation complete = 01 Job. (xiii) Interlocking arrangements between 33 KV Isolator and 33 KV VCB with limit switch - 01 Job. (C) Outdoor type current transformer 33 KV, 100/50/5 dual ratio, 15 VA, burden accuracy class 5P10 for protection and 1.0 for metering, STC 25 KA oil cooled dead tank type complete set of three - 01 Job.

(D) ONAN Potential Transformer 33000 V / √3 / 110 V / √3, minimum capacity 100 VA, accuracy class 1.0 with secondary protected by SP MCB complete set of three - 01 Job. (E) Supply and Install auxilliary power supply system for protection of panels complete with maintenance free lead acid batteries mounted on MS rack and connection complete in all aspects , with installled capacity 110V (2V volts x55) 100Ah, including 110V-25A booster and trickle charger, as per specifications and including DC DB for charger complete with DC ammeter , voltmeter, switches for 11/33 KV system complete with all controls .-01 Job (Note:- Rate Quoted by the firm for this item should include the cost of the following:- (i) PCC work / any civil work for foundation required for errection of VCB and other accessories all as per standard norns. (ii) Contractor shall submitt type test certificate to the GE for approval before placing the order. (iii) Any other item required to complete the job for any technical requirement as per CEA/NPERC. (iv) VCB shall be inspected by inspecting officer nominated by the Accepting Officer at Manufacturer's factory and all routine test pertaining to IS shall be carried out. (v) Design, drawing of VCB to be submitted by the contractor for approval from the Accepting officer before manufacturing.

M&L for earthing complete with galvanised steel earth plate electrode 600x600x6.0mm thick directly burried in the ground (earth pit not less than 2.25M deep below ground level) with top edge of earth plate not less than 1.50M deep below normal ground level, connected to copper iron strip 20x3 mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel, 40mm bore GI pipe light grade including necessary fittings for protection of earthing strip, watering pipe 20mm bore GI medium grade, concrete chamber in PCC 1:2:4 type B-1 using 20 mm graded crushed stone aggregate, coping shall be in PCC 1:2:4 type B-1using 20 mm graded crushed stone aggregate and internal surfaces of concrete chamber shall be given 12mm thick plaster in CM (1:4), funnel with wire gauge of 22 gauge 8 mesh per linear including 50mm thick cover of RCC (1:2:4) type B-1 using 20mm grade stone aggregate reinforced with 8mm MS TMT bar @ 75 mm C/C both ways, char coal dust and common salt all as shown in electrical plate No. 3 of SSR Part-I (2009) including all necessary excavation & earth work and removal of surplus soil to a distance n. exc 50M and providing connection points with MS/ GI bolts & washers as required and connection from earth test point to earth electrode with same GI earth strip alongwith protection pipe and testing on completion complete all as specified and directed. Note:- GI strip and protection pipe from earth electrode to test point, max upto 7.50M, shall be deemed to be included in the unit rate as quoted by the contractor against this item.

Supply, laying, testing and commissioning HT UG cables, 11000 Volts grade, 3 core x 120 Sq mm (Earthed), XLPE insulated and PVC shealhed, steel wire armoured, with multi stranded aluminum conductor, heavy duty conforming to latest relevant IS, cables laid in trenches. ducts. under plinth floors passing through pipes etc, fixed on wall complete all as specified and directed. NOTE:- Excavation and earth work, sand cushioning, cable protection covers, cable protection pipe shall be measured and paid for separately under respective items in this BOQ

M & L cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and including applying one coat of synthetic enamel paint over a coat of red oxide primer complete all as specified and directed.

M & L Roof trusses (framed), trussed, purlins, crane gantries, rails and fastenings and heavy bracket framing (Beam, tee, angle, channel or flat sections) including distance pieces, cleats etc conforming to (Fe-410-W (Gde E-250, Quality 'A')), complete all as specified and directed.

Dismantling cross-arms of M.S. channel or angle sections, rail/channels, purlins etc. complete and removal from site of work, complete all as specified and directed.

Supply, fixing and stretching new ACSR conductors of any size and type for over head HT poles including binding at site to insulator with suitable size of binding wire (14 SWG binding wire) and testing, complete all as specified & directed.

M&L for cable jointing kit for 11 KV (Earthed) grade cable for indoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 sqmm to 185 sqmm and testing on completion complete all as directed.

M&L for cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 sqmm to 185 sqmm and testing on completion complete all as directed.

M&L 20x3 mm copper strip as 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 complete all as specified and directed.

M&L for broken stone aggregate for loose filling under 11 KV four pole and arround the transformer , of gauge 40 mm graded in and including for stacking materials in regular heaps/stacks for measurement complete all as specified and directed.

Taking down old unserviceable CT any type and size , complete all as specified and directed.

Taking down old unserviceable PT any type and size , complete all as specified and directed.

Taking out Old unserviceabel HT cable of any type and size complete all as specified and directed.

Taking down old unserviceable earthing any type complete all as specified and directed.

Takingdown old unserviceable ACSR conductors complete all as specified and directed.

M&L for shifting of transformer (power transformer) after disconnecting all connections and shifting to locations within 5 KM all as per site requirement complete all as specified and directed.

Excavation in trenches, not exceeding 1.5m wide and not exceeding 1.5m in depth for foundation, for laying of pipe, cable etc or n. exc.10 Sqm on plan and n. exc. 1.5m in depth for shafts, cesspits, manholes, pier holes, etc and getting out in any type of soil complete all as specified and directed.

Returning, filling in excavated approved soil, including spreading, levelling, watering and well ramming in layers not exceeding 25cm each complete all as specified and directed.

Removing excavated soil not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point including spreading complete all as specified and directed.

Supply and spreading clean and dry fine sand free from sharp materials (unwashed) laying in trenches around the cable for cushioning in trenches, laid to a uniform thickness of 23cm (15cm under the cable & 8cm over the cable) and gently punned down to 18cm thickness complete all as specified and as directed. Note: Only punned thickness of sand shall be measured and paid.

Supply and laying un-reinforced precast concrete cable covers, Class HV, type1, flat, size 300 mm x 180 mm x 40 mm, complete all as specified and as directed.

Schedule of credit amount of Rs 37,250.00 to be deducted during AOC

JAZZCON ENGINEERS PVT LTD (BID ID -3453375)

M/S RAKESH TRADERS (BID ID -3453799)

GEPS PROJECTS (BID ID -3453509)