Special repair to replacement of 2 x 1.6 MVA (34 Year old) 33/11 KV Transformer and connected works under CWE Jabalpur

Amount

Supply, installation, testing, and commissioning of Power Transformer step down, out door type SCADA compatible of capacity 1600 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 1.25% (16 steps), % impedance should not be less than 6.50% at normal / common tap No. 7 including suitable marshalling box and HV terminals 3 Nos outdoor bare bushings with socket and LV terminal connectors of copper to connect the transformer with HT XLPE Power cable of size 185 sqmm x 3 core with aluminium conductor and LV side additional Neutral with one No. solid porcelain type out door bushings 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. The temperature of oil shall not rise 45˚c to ambient 55˚c of winding. Transformer shall be painted with two coats of synthetic enamel paint with two coats of epoxy paint as per IS -632. 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) Explosion vent with diaphragm and equalizer pipe (pressure release valve). (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. (xix) 150mm dia oil temperature indicator stems type. (xx) Double float Buchholtz relay with two sets of contacts and isolating valves. (xxi) 150mm dia winding temperature indicator with maximum indicating pointer and resetting device. (xxii) 100mm dia magnetic oil level gauge with low level alarm. (xxiii) Terminal arrangements (xxiv) Suitable wheels (width /distance should be as per Broad Gauge rails). (xxv) Marshalling box.

(xii) Insulated terminal board (with connector) for transformer tap leads. (xiii) Mechanical tap position indicator with handle. (xiv) Tap changing operation counter, (xv) Rating plate. (xvi) Driving mechanism chamber locking arrangement. (xvii) Un -drilled gland plate for cable entry. (xviii) Terminal strips. (xix) Drain cum filter valves. (xx) Stoppers to prevent over travelling of mechanism.

(xxi) Indoor floor mounted remote control cubicals (RTCC Panel , AVR relay) with rear accessories on HV side to vary secondary voltage as mentioned 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 Manufacturer's factory or approved laboratory and the rate 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 officers nominated by CWE Jabalpur 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 Department. (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 for 1 run of 95 Sqmm , 3 core HT XLPE cable (E) is deemed to be included in the unit rate quoted by the Bidder. (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 die-electric strength not less than 70KV at 2.5mm gap is deemed to be included in the unit rate quoted by the Bidder. (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 submitted 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.

Supply, installation, testing, and commissioning of Power Transformer step down, out door type SCADA compatible of capacity 1000 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 (+)15% to (-) 15% in steps of 1.25% (16 steps), % impedance should not be less than 6.50% at normal / common tap No. 7 including suitable marshalling box and HV terminals 3 Nos outdoor bare bushings with socket and LV terminal connectors of copper to connect the transformer with HT XLPE Power cable of size 120 sqmm x 3 core with aluminium conductor and LV side additional Neutral with one No. solid porcelain type out door bushings 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. The temperature of oil shall not rise 45˚c to ambient 55˚c of winding. Transformer shall be painted with two coats of synthetic enamel paint with two coats of epoxy paint as per IS -632.

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) Explosion vent with diaphragm and equalizer pipe (pressure release valve). (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.

(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 Manufacturer's factory or approved laboratory and the rate 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 officers nominated by CWE Jabalpur 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 controll 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 Bidder.

(e) Foundation and civil works as per Manufacturer's recommendation shall be provided at 'NO' extra cost to the Department. (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 for 1 run of 95 Sqmm , 3 core HT XLPE cable (E) is deemed to be included in the unit rate quoted by the Bidder. (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 die-electric strength not less than 70KV at 2.5mm gap is deemed to be included in the unit rate quoted by the Bidder. (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 submitted 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 to the Government.

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 304 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, the Manufacturer shall submit type test reports for the 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 conforming to 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, Bucholtz, 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, 50 - 25 / 5+5+1, 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 auxiliary 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 shall include the cost of the followings:- (i) PCC work / any civil work for foundation required for erection of VCB and other accessories all as per standard norns. (ii) Contractor shall submit type test certificate to the Engineer - in - Charge / 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 the approval of the Accepting Officer before manufacturing.

M&L for Earthing complete with copper earth plate electrode 600 x 600 x 3.15 mm thick buried directly in ground earth pit not less than 2.25mtr deep below normal ground level with top edge of the plate not less than 1.5 mtr below ground level connected to copper strip of size 20 x 3 mm as earthing lead by means of nut/bolt and washer of galvanized iron or steel drawn through 40 mm dia light grade GI pipe as shown in electrical plate no 3 of SSR Part-I ( 2009) including necessary excavation and earth work GI pipe 20mm dia medium grade for watering PCC chamber with PCC cover in cement concrete 1:2:4 Type B1(20mm graded crushed stone aggregate), funnel, wire mesh, charcoal dust, salt etc, connected to Panel board/Tranformer body, APFC Panel, VCBs etc as indicated including testing complete all as specified and as directed. Note :- Earth protection pipe & earthing strip upto and including 7.5 m length is deemed to be included in unit rate quoted by the contractor.

M&L for Earthing complete with galvanized steel earth plate electrode 600 x 600 x 6 mm thick buried directly in ground earth pit not less than 2.25mtr deep below normal ground level with top edge of the plate not less than 1.5 mtr below ground level connected to galvanized earth lead wire 4 mm dia as earthing lead by means of nut/bolt and washer of galvanized iron or steel drawn through 40 mm dia light grade GI pipe as shown in electrical plate no 3 of SSR Part -I (2009) including necessary excavation and earth work GI pipe 20mm dia medium grade for watering PCC chamber with PCC cover in cement concrete 1:2:4 Type B1(20mm graded crushed stone aggregate), funnel, wire mesh, charcoal dust, salt etc, connected to Panel board/Transformer body, APFC Panel, VCBs etc as indicated including testing complete all as specified and as directed. Note :- Earth protection pipe & earthing wire upto and including 7.5 m length is deemed to be included in unit rate quoted by the contractor.

Supplying, installing, commissioning and testing Air break gang operated triple pole switch out door type with 15 Nos polymer based insulators suitable for 33 KV, HT 50 Hz of capacity 400 Amps rating with polymer based drop out fuse assembly with fuse carrier, fuse element (set 3 Nos) mounted insulators and fitted on steel frame horizontally operated (rotory type) mechanism from ground level consisting of operating rod of 25 mm bore heavy grade GI pipe of suitable length worked from ground level and with locking arrangement including pad locks, flat iron clamp 50 mm x 6 mm and MS channel of suitable size and length for fixing GOD including bolts, nuts, and washers complete all as specified and directed.

Supply and fix Lightening arrestor HT 33 KV, non-linear resistor type conforming to IS 3070 (Part-1) 1993 complete, line discharge class-3, nominal discharge current 65 KA (peak), 34 KV rated system, voltage peak value high current implus of 4/10 micro sec wave shape 100 KA (peak) assembly suitable for 33 KV, long duration discharge class-II with insulation level 28 / 75 KV and mounted on hot dip galvanized steel structure including all clamps, nuts, bolts and washers and connecting to earth with 4 mm dia GI wire complete all as specified and directed.

Supplying, installing, commissioning and testing 11 KV Air break gang operated triple pole switch out door type of capacity 400 Amps AC mechanically operated mounted on polymer based insulators and steel frame with operating mechanism worked from ground level and polymer based drop - out fuse set (set of 3 Nos), mounted on insulators with steel frame with expulsion fuse carriers and fuse element upto 100 Amp complete with locking arrangements including pad locks with key complete suitable for 11KV, HT, 50 Hz complete all as specified and directed.

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 aluminium 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, earth work, sand cushioning, cable protection covers, cable protection pipe shall be measured and paid for separately against relevant item of this BOQ

Supply, laying, testing and commissioning of HT UG cables, 33000 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, earth work, sand cushioning, cable protection covers, cable protection pipe shall be measured and paid for separately against relevant item of this BOQ

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 inclusive of one primer coat, one under coat and one finishing coat of synthetic enamel paint complete all as specified and directed.

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 (Fe-290 (Gde E-165)) for 33 KV gantries yard complete all as specified and directed.

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

Supply, fixing and stretching new ACSR conductors for 33 KV gantry yard of any size and type for over head HT poles including binding at site to insulator with suitable size of binding wire etc complete all as specified and directed by Engr in charge.

Supply and fixing of new pin type polymer, vitreous, white/ brown/ green insulator 150mm high and 150mm dia including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, suitable for HT 33000 volts complete all as specified and directed.

Supply and fixing of new disc type insulator, polymer, vitreous white/ brown/ green 145mm high and 225mm dia ball & socket type single disc assembly for tension with GI tension clamps for conductors for working pressure of 33000 volts complete all as specified and directed.

Supply & Fixing, in replacement, post type polymer insulator suitable for 33 KV complete all as specified and directed.

Supply and fixing of new pin type porcelain, vitreous, white/ brown/ green insulator 150mm high and 150mm dia including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, suitable for HT 11000 volts complete all as specified and directed.

Supply & Fixing post insulator for Air Break switch with metal part suitable for HT 11KV conforming to IS 5572-1972 complete all as specified and as directed.

Supply and fix cable jointing kit for 11 KV grade cable for indoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE, armoured, Al conductor cable of size 120 sqmm to 185 sqmm complete all as specified and as directed.

Supply and fix cable jointing kit for 11 KV grade cable for outdoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE, armoured, Al conductor cable of size 120 sqmm to 185 sqmm complete all as specified and as directed.

Supply and fix cable jointing kit for 33KV grade cable for outdoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE, armoured, Al conductor cable of size 120 sqmm to 185 sqmm complete all as specified and as directed.

copper strip(20x3 mm) 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 20x3 mm

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

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

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

Taking down old unserviceable 33 KV out door type gang operated air-break switch complete all as specified and as directed.

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

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

Taking down old unserviceable ACSR conductors complete all as specified and as directed.

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

M&L for 40 mm well graded broken stone aggregate for loose filling under 11 KV, four pole and around the transformer , in and including for stacking materials in regular heaps/stacks for measurement 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: Punned thickness 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 61,500.00 to be deducted during AOC

RAVINDRA BROTHERS (BID ID -3300579)