81251/E8 AUGMENTATION AND UPGRADATION OF 250 KVA TRANSFORMER TO 800 KVA AND ALLIED WORKS AT JAL VIHAR ELECTRIC SUBSTATION UNDER GE HADDO AT SRI VIJAYA PURAM

Supply, installation, testing and commissioning of copper wound transformer step down, indoor/outdoor type complete with standard fittings, 50 Hz, ambient temp 50 degree celcius with lifting lugs, top cover lugs, earthing terminals and conservator with oil gauge glass, oil filling hole with plug and drain plug, with also transformer drain valve and thermometer pocket, air vent plug, silica gel breather,cooling radiator, rating and diagram plate inspection cover terminal marking plate, buchholz relay with alarm and tripcontacts, oil temp indicator and with winding temp indicator with alarm, HT 11 KV, 3 Phase, LT 433 volts, 3 Phase 4 wire with off load tappings on HT side to vary secondary voltage with in limit, all as per IS:1180, Level-II with foundation of capacity 800 KVA as per OEM recommendation complete all as specified and directed.

S&F in repair including laying, testing and commissioning of LT XLPE insulated, sheathed, armoured heavy duty electric aluminium conductor cable 1100 Volts grade of size 3.5 core x 400 Sqmm, laid in trenches, ducts, pole, wall etc complete all as specified and directed. Note: Excavation earth work, cable cover, sand, protection pipe etc will be measured and paid separately.

M&L for cutting of bituminous road / Footpath to a width of 60cm and depth 90cm for laying of LT cable and making good with PCC (1:3:6) type B1(using 20mm grade stone aggregate)complete all as specified and directed.

S&F gang operated air Brake switch triple pole mechanically operated mounted on insulator & steel frame with operating mechanisam worked from ground level suitable for 11 KV for current rating upto 200 Amp of approved make with and including operating rod, GI tubing 25mm dia medium grade single piece of suitable length and insulated handle complete all as specifed and directed. Note : AB switch shall consist of three insulators per phase and 9 isolators in all.

S&F in repair lightining arresters expulsion type complete with all fittings transmission class discharge capacity 65 Kilo Amp suitable for 11000 volts complete icomplete all as specified and directed.

M&L for jumper connection not less than 1.5m long between bus system to GOD and GOD to DO fuse unit with jumper made of 11 KV aluminum conductor (11 KV) including clamps, crimple, PVC slveeeves complete all as specifid and directed.

M&L in repair 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 with and including one coat of red oxide primer and one finishing coat of aluminium paint complete all as specified and directed.

M&L for mild steel screw bolts (machine made) with hexagonal or square heads at one head and screwed at the other, screwed end to be fitted with washers and one hexagonal or square nut, n exc 5cm long with da of bolt upto 10mm complete ass as specified and directed.

S&F in repair 100mm bore GI Pipe, light grade in the trench crossings/ obstructions for cable protection complete all as specified and directed.

Disconnecting and taking down of old serviceable LT UG cables of size 3.5 core, 400 Sqmm from transformer and draw out from the pipe/duct or in under ground with and including re-laying and reconnecting in trenches or in walls or poles with necessary clamping to new transformer at same location complete all as specified and directed.

Excavation in tranches n'exc 1.5m wide and n'exc 1.5m deep in soft/loose soil and getting out complete all as specified and directed.

Returning, filling in incl spreading, levelling and well ramming in layers not exc 25 cm in soft / loose soil complete all as specified and directed.

Removing excavated soil to a distance not exc 50m and depositing where directed at level not exc 1.5 m above starting point all as specified and directed.

S&F expulsion fuse unit single pole mounted on insulator & steel frame complete with fused barrel (drop out fuse) suitable for 11 KV for current rating upto 50 Amp complete all as specifed and directed.

M&L for Earthing complete with copper earth plate electrode 60cm x 60cm x 3.15mm thick, buried directly in ground (earth pit not less than 2.25m deep below ground level) with top edge of earth plate not less than 1.5m below normal ground level, connected to copper earth strip of 20X3mm size by means of bolts, nuts, check nuts and washers of copper and connected from earth plate electrode to main switch board/ earthing test point including and protected by 25mm bore medium grade GI pipe, watering arrangement with PCC 1:3:6 type C1 chamber, MS funnel, wire gauge, 50mm thick precast RCC cover in type B1, including necessary excavation in any type of soil, returning, filling in, removal of surplus soil to a distance n.exc 50m, charcoal and salt complete all as shown in electrical plate No. 3 of Schedule Part-I 2009 and connected to earthing test point and testing on completion incl taking down old unserviceable earthing complete all as specified and directed. NOTE:- The cost of earth lead and protection pipe upto and including 7.5 mtr only from the top of earth electrode are deemed to be included under this item.

S&F in repair copper earth strip of size 20x3mm 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, fixed with necessary clamps and nuts, bolts etc complete all as specified and directed.

M&L for shifting of transformer of capacity 250KVA from Jalvihar substation to other substations/transformer locations at haddo area by road with and including removing the old transformer from the plinth and fixing/errecting of the healthy tansformer with the hydra/crane support, making necessary HT/LT cable connections, earth connections and restoration of power supply all as specified and directed.

S&F including laying of HDPE DWC pipe of size 120mm (OD) x 103mm (ID) along with connected accessories like couplers, bends, end caps etc. for LT/ HT cable protection complete all as specified and directed.

S&F of out door LT Panel / LT Pillar Box of required size with following specifications :- (a) Fabrication Details : CPRI approved Main frame 3.15mm thick CRCA sheet, partition sheets / covers / doors of 3 mm thick CRCA sheet, gland plates 3 mm thick MS sheet (undrilled), base frame on ICMS channel with provision of incoming and outgoing cable entry at the bottom for outdoor installation, free standing floor mounted with degree of protection IP-54 and locking arrangements. (b) Bus bar details : Material shall be alluminum bus bar, sleeving heat shrinkable type, with bus bar sizes for phase 50mmx10mm (3 Nos) aluminium Flat, neutral 50x10mm aluminium flat and bus bar support of epoxy type. (c) Painting Detais : Pillar box shall be powder coated and painted with two coats of synthetic enamel spray paint over a coat of redoxide primer.

Taking out LT panel/ change over panel / feeder Pillar Panel installed at jalvihar of any size and capacity by disconnecting all incoming and outgoing cables including breaking of PCC foundation for transporting and fixing in other place safely as directed with and including re-fixing of LT panel/ change over panel /Feeder Pillar Panel with new PCC foundation, angle supports, nuts, bolts and washers including transportation like crane, truck etc without disturbing existing electrical system complete all as specified and directed.

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