CWE/AF AMB/AMB-47/2021-22 PROVISION TRANSFORMER AND ALLIED EXTERNAL E and M SERVICES AT TECHNICAL AREA AT AF STATION AMBALA UNDER GE (AF) AMBALA

Amount

Supply, installation, commissioning and testing of 750 KVA transformer, step down, 11 KV (primary side)/433 volt (secondary side) as per IS-1180-2014 (Level-III), copper wound, suitable for AC, three phase, 4 wire, 50 Hz system, indoor type, floor mounted, oil immersed having Vector group DYN-11, no load voltage ratio- 11/0.433 KV, temperature rise in oil 45 degree centrigrade & in winding 55 degree centigrade, Oil Natural Air Natural (ONAN) cooled with and including first filling of transformer oil, delta connection on HT side, star connection on LT side, manually, operated, off-load tap changer on HT side to vary secondary voltage to + 7.5% & -7.5% in three steps & above of 2.5% each, cable end box at HT & LT side, LT side cable box shall also be fitted with suitable size of cable glands for making connections with all the accessories as per clause 19.14.1.2 of SSR Part-I and the under mentioned fittings complete all as specified and directed:-

(a) Rating plate and terminal marking plate. (b) Two earthing terminal for body earthing and two additional for neutral brought out on a bushing. (c) Lifting lugs. (d) Drain valve with plug or cover plate. (e) Dehydrating breather. (f) Oil level indicator with minimum and maximum marking. (g) Cooling radiator. (h) Thermometer pocket. (j) Conservator. (k) Oil filling hole with cover. (l) Thermometer 100mm dial/stem type with metal guard having maximum temperature indication with resetting. (m) Silica gel breather duly filled with silica Gel. (n) Plain breathing device which would not permit ingress of rain water & incsects. (o) High voltage / low voltage copper stud bushing with cable end box. (p) Control cable for connection of buchholtz relay including buchholtz relay as per manufacturer's recommendation. (q) Any other fittings as recommended by the manufacturer of efficient functioning of the transformer.

Notes:- (i) The transformer shall be of latest star rated and energy conservation (Energy conservation Binary Corps) for which necessary test certificate of manufacturer shall be produced by the contractor. (ii) Transformer manufacturer shall be in possession of licence from bureau of Indian standard. (iii) The fitting & accessories of the transformer shall be conforming to is 3639 : 1996. (iv) The transformer shall be tested as per IS for all routine tests in the factory premises in the presence of rep of Accepting Officer on the receipt of request from the contractor in addition to routine tests . The transformer shall be tested for 10% over load at factory premises for minimum 01 hour after full load cycle of 08 hours. (v) The Transformer shall be tested by SEI/EI/AEI beore commissing as & when requested by contractor. (vi) All necessary arrangements i.e. co-ordination with the manufacturer & testing officer, arranging equipments and material to facilitate testing at the manufacturer’s premises etc. shall be borne by the contractor. (vii) Next immediate Higher capacity of transformer shall be provided without any price adjustment if the capacity specified in BOQ/Schedule ‘A’ is not available in market. Similarly in case if transformer for specified capacity are aviailbale with latest specification in market, the same shall be provided without any price adjustment.

Supply, installation, commissioning and testing of HT 11KV, 3 phase 50 hertz, indoor type, floor mounted, horizontal drawout, vertical isolation type totally enclosed metal switchgear complete vaccum circuit breaker of capacity 400 Amp as outgoing with motor operated, spring charged having rupturing capacity of 250 MVA with over load & earth fault protection, 230 volts, AC Single phase 80watt rated strip type heater with thermostat with indicator complete- 02 Nos., current transformer (CT chamber incorporating 3 single phase resin cast dual class, dual ratio CTs of ratio 200/100/5 Amps with suitable VA burden and accuracy class - 01 No., provision of PTs for measurement of voltage, rear cable termination provision for terminating 3 core upto 120sqmm XLPE cable, digital amperemeter, digital voltmeter, 2X12volt DC battery with provision of battery charger, Triple pole digital numerical relay for over current setting 50% to 200% and one high set element for earth fault protection setting 20% to 80%, On/Off/Trip indicator - 01 No., TNC switch - 01 No., Trip circuit healthy indication lamp with push button - 01 No., 3 phase RYB indication with lamp & holder - 01 set, cable glands of suitable size, in built integral earthing including connection with extending the copper busbars for coupling with existing VCBs complete with standard fittings including testing on completion at site complete all as specified and directed.

Notes:- (i) Rate of cutting in existing VCB, modification of existing busbar for matching with new busbar will be included in the quoted rates. (ii) The drawings in respect of VCB shall be approved by Accepting Officer through GE and as & when requested by contractor before placing order to manufacturer (iii) VCB shall be tested by representative of Accepting Officer at factory premises before dispatch as & when requested by contractor. (iv) The testing and commissing of the VCB shall be carried out in presence of Electrical Inspector as & when requested by contractor.

M&L earthing complete with galvanized steel earth plate electrode 60cm X 60cm X 6mm thick buried vertically in ground to depth not less than 2.25 mtr below ground level, with top edge of earth plate not less than 1.5 mtr below ground level surrounded from all sides by 15cm thick packed layer of Charcoal dust & common salt filled in alternate layers and electrode connected to GI earth lead strip 32 mm x 6 mm upto 7.5mtr long by means of bolts, nuts, check nuts and washers of galvanized iron and connection to earthing test point & earth dolly & watering pipe medium grade GI 20 mm bore including protection pipe GI light grade 40mm bore, including wire mesh, funnel, lugs, salt, charcoal dust, excavation in soft/losse soil, returning filling & removal of surplus soil upto 50mtr, pit chamber shall be of PCC 1:3:6 type C-1(using 20 mm graded mechnically crushed stone aggregates) and pit cover slab shall be of RCC 1:2:4 type B-1 (using 20 mm graded mechnically crushed stone aggregates) reinforced with 8mm dia deformed bars @ 15cm centre to centre both ways including necessary form work and earthwork in soft/losse soil complete all as shown in electrical plate No 3 of SSR part-I, including testing on completion at site complete all as specified & directed. Notes:- (i) Any variation in length of earth lead and protection pipe of earth lead shall be adjusted through DO. (ii) On testing if the desired earth resistance is not obtained, earthing will be generated at no extra cost , till the desired earth resistance is obtained. (iii) The chamber shall be constructed atleast 1.5 mtr away from the earth electrode.

Supply, installation, testing & commissioning, cubical type, CPRI approved, compartmentalized (seprate compartments for each MCCB), powder coated LT panel, outdoor type, factory made, confirming to IS/IEC-61439(2011), IP-67 protection, suitable for operation on 415 volts, AC 3 phase, 4 wire, 50 Hertz electric supply system, made out of 50mm x 50mm x 6 mm angle iron frame and 3.15 mm thick powder coated CRCA sheet, side covers with front and back hinged doors with proper locking arrangement, double door, rubber gasket on front and back to make it totally enclosed, dust proof, weather proof & vermin proof, having busbar chambers with & including 1600 Amp rated copper busbar, 4 pole duly insulated with colour coated PVC sleeves as per standard code, rigidly mounted on bakelite/DMC insualtors(square/rounded with good insulation resistance), mounted on 100mm thick PCC platform of 1:3:6, type C-1 (with 20 mm graded stone aggregate) suitable size(with 0.5 mtr offset to all sides of panel), the MS angle legs (04 legs) shall be 40cm above FFL complete with the following accessories all as specified & directed:-

(a) Incoming (i) ACB 1250 Amp, 415 volt, 50 KA, 4 pole, adjustable type, manual drawout type - 01 No. (ii) Indicator lamp LED type R,Y,B(set of three) - 01 set (iii) Digital voltmeter, 3 phase, 0-500 volts, square type-01 No. (iv) Digital Amperemeter, 3 phase, 0-1250 Amp, square type-01 No. (v) Copper bus bar capacity 1600 Amp mounted on suitable insulators - 04 Nos. (b) Outgoing (i) MCCB, 630 Amp, 415 Volts, 50 KA, 4 pole, adjustable type with thermal magnetic release, adjustable with set of spreaders - 02 Nos. (ii) MCCB, 500 Amp, 415 Volts, 50 KA, 4 pole, adjustable type with thermal magnetic release, adjustable with set of spreaders - 02 Nos. Note: (i) The cost of Earthwork if any & PCC foundation deemed to be included in quoted rates. (ii) Layout diagram of LT panel shall be produced by contractor for approval of Accepting Officer through GE before placing order to manufacturer and panel shall be brought at site as per approved drawing. (iii) The following also included: Gland plates, Air vent gaskets/louvers, cable glands, lifting hooks, ventilation louvers.

Supply, laying, jointing, testing and commissioning HT XLPE cable (heavy duty), 11000 volts (earthed), cross sectional area 120 Sqmm, 3 core, insulated, screened, sound compacted aluminium conductor, screening with extruded semi conducting layers, insulation screening with copper tape covers laid up with PVC (ST-2), extruded inner sheathed GI strip armoured PVC (ST-2) out sheathed, ISI marked with IS-7098 Part II with amendment, laid in trenches /pipes /ducts /along poles/ walls/ equipment etc complete all as specified & directed. Notes: (i) Cable shall be of manufacturing date not earlier than Sep 2021. All the cable shall be embossed with year of manufacturing, meterage at every metre, in addition to its own standard markings as per IS i.e. Size, voltage etc. (ii) Excavation & earth work, sand cushioning, end termination joints, protection pipes & protection covers shall be measured and paid separately. (iii) No straight through joint shall be permitted in less than single drum length. (iv) The contractor shall produce original purchase vouchers duly machine numbered alongwith excise duty gate pass of factory for verification and record. (v) Cable shall be tested in the presence of rep of Accepting Officer at the factory premises and in the presence of GE or rep of GE after laying in the trenches & before returning filling in the trenches as & when requested by contractor.

Excavation in trenches not exceeding 1.5mtr wide and not exceeding 1.5mtr in depth for foundation etc or for walls, shafts, manholes not exceeding 10 sqm on plan or for laying pipes/cables etc and getting out, in soft/loose soil complete all as specified & directed. Note: Excavation shall be done manually only and not by E-JCB or any other mechanical means. Any cut /damage to existing cable during excavation shall be rectified by the contractor as per direction of Engineer-in-charge within 24 hours without any extra cost of department.

Returning filling in including spreading leveling watering and well ramming in layers not exceeding 25 cm thick each in soft/loose soil complete all as specified & directed.

Removal of excavated soil to a distance not exceeding 50 mtr & depositing where directed at a level not exceeding 1.5 mtr above the starting point complete all as specified & directed.

M&L Sand cushioning to cable with a layer of sand 8 cm deep before laying the cable and 15 cm deep after laying the cable (punned down to 18 cm depth after laying and stretching of cable) complete all as specified & directed.

M&L un-reinforced precast concrete cable cover, Class HV type-1, flat, size 300mm x 180mm x 40mm, laid flat for protection of cable, adjacent to each other, perpendicular to central axis of cable complete all as specified & directed.

S&F cable jointing kit for 11000 volt earthed grade, indoor, end termination heat shrinkable type joints with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120sqmm complete all as specified & directed.

S&F HT Busbar chamber, size 120cm x 120cm x 90cm suitable for 3 phase 11000 volts, outdoor type, factory made, powder coated, made out of 3.15mm thick CRCA sheet with 400 amp rated aluminium busbar 3 Nos. PVC sleeves and coloured (Red, Yellow & Blue) with mounted on suitable size SMC/PVC/porcelain insulator and chamber shall be mounted on MS anlge iron (40mm x 40mm x 6mm) stand frame with legs 3 feet long grouted in ground as directed by Engineer-in-charge with PCC foundation 1:2:4 type B-1 (20mm graded mechanically crushed stone aggregate), all necessary cable connections, lugs and cable gland complete all as specified and directed. Note: (i) The MS angle iron frame shall be painted with two coats of synthetic enamel paint over & including one coat of red oxide primer. (ii) Necessary earthwork in any type of soil, PCC & painting included in quoted rates.

Supply, laying, jointing, testing and commissioning LT XLPE electric cable, 1100 Volts grade, heavy duty, PVC insulated and sheathed armoured electric power cable with stranded copper conductor of cross sectional area 300 sqmm 1 core conforming to IS- 7098 (Part I) 1988 as in trenches or along the wall/pole through pipe etc, complete all as specified and directed. Note:- Excavation & earth work, sand cushioning, protection pipes & protection covers shall be measured and paid separately.

M&L for making bore under roads / paths / hardstanding concrete/taxi track bituminious etc. of any length at any location for insertion of GI protection pipe upto 80mm bore to pass the HT/LT cables in soft /losse soil with complete arrangement of T&P including making good the disturbed surface after laying of pipe complete all as specified and directed. Note: GI pipe shall be measured and paid seprately.

M&L GI pipe 80 mm bore, light grade confirming to IS 1239, in any length with all fittings laid in trenches, under road, under floor, fixed to wall with fixing arrangement or along the pole with fixing arrangement etc for cable protection complete all as specified and directed .

Raman Electric Trading Co

Electromech Engineers

Esha Engineers

M/S JIWAN KUMAR MITTAL

Ess Ess Engineers