SPECIAL REPAIR TO REPLACEMENT OF BER TRANSFORMER OF CAPACITY 500 KVA AT AREA DRAINAGE PUMP HOUSE UNDER GE(FW) KOLKATA

Amount

Excavating in trenches, not exceeding 1.5 metres width and not exceeding 1.5 metres in depth in soft / loose soil and getting complete all as specified and directed

Returning, filling in including spreading, levelling, watering and well ramming in layers not exceeding 25cm in soft / loose soil complete all as specified and directed

Removal of excavated material to a distance n.exc 50m and depositing where directed at a level n.exc 1.5m above the starting point complete all as specified and directed

M & L for Disconnecting of HT, LT connections of existing transformer with earthings carefully of capacity 500 KVA and shifting the same from platform / sub station including transformer oil and accessories to AGE E/M Store yard complete all as specified and directed

Supply, Installation, Testing & Commissioning of transformer of capacity 500 KVA, Oil Natural Air Natural (ONAN) Cooled, Oil immersed, copper wound, Outdoor type, step down complete with first filling of IS 335, ISI marked, filtered & dehydrated transformer oil and other standard fittings / accessories and seven position off circuit tap changer (tapping range ± 7.5% in steps of 2.5% each) with vector group Dyn-11 with HV & LV cable boxes with cable glands as per cable sizes as per site requirement, HT 6.6 KV, 3 Phase, LT 433 volts, 3 Phase 4 wire 50 Hz as per Level-II of IS 1180 (Part I) :2014 complete all as specified and as per approved manufacturer's instructions. Note:- Unit rate shall be deemed to include cost of necessary platform for mounting transformer as per manufacturer's instruction and cost of all testing charges before and after commissioning.

S & F XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured (Earthed), electric power cables (heavy duty) with aluminium conductor, 6600 volts, grade cross sectional area 95 Sqmm 3 core complete all as specified and directed including taking up / down old unserviceable cables with protection cover of brick / concrete / pipe.

Supply, laying & testing cable XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor, 1100 Volts of cross sectional area 400 Sqmm, 3.5 core complete all as specified and directed including taking up / down old unserviceable cables with protection cover of brick / concrete / pipe.

S&F of cable jointing kit for 6.6 KV(Earthed) grade cable for indoor termination heat shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 -120 Sqmm complete all as specified and as directed.

M & L for galvanised earthing complete with galvanised steel earth plate electrode of size 600 x 600 x 6.3mm thick buried directly in ground vertically at a depth not less than 2.25 mtr below ground level with top edge of earth plate at a depth not less than 1.5 mtr below normal ground level surrounded from all sides by 15cm thick and packed layer of charcoal dust and common salt filling in alternate layers and electrode connections by using galvanised iron strip 32 x 6mm by means of bolts, nuts, check nuts and washers made of MS and protected by light grade 40mm dia and 20mm dia bore for watering and incl funnel, wire mesh RCC pit cover and PCC chamber pit with PCC 1:2:4 type B-2(incl excavation and earth work, disposal of surplus soil to a distance not exc 50 mtr) all as specified and shown on Plate No 3 of SSR Part-I 2009.

Supply and fixing Galvanised iron strip 32 x 6mm for connection of earthing with Transformer and directly burried in ground complete all as directed.

M & L for sand cushioning / sand covering for underground cable protection and consolidated and compacted with clean dry sand complete all as specified and as directed.

M & L bricks with sub class 'B' locally available, laid in trenches above sand cushioning for cable protection complete all as specified and directed.

Supply & laying un-reinforced precast concrete cable cover, class HVP, Type 1 with peak, size 300mm x 180mm x 40mm laid in trenches above sand cushioning for cable protection complete all as specified and as directed.

M&L for Galvanised Steel Tubing Pipe 100 mm bore(dia), light grade with Bends, laid in trenches or under Roads / Flooring / Culverts etc complete all as specified and directed.

MS AP CONSTRUTION AND CO

ARATI TRADING CO

SOMIK DAS

Prasur Electricals & Engineering Co.

INDIA ELECTRICAL EQUIPMENTS