REPAIR AND REPLACEMENT OF SPARES TO HT VCBs RMUs LBS AND 11KV OVERHEAD LINES GOD LIGHTNING ARRESTOR INCLUDING CERTAIN IMPROVEMENTAL WORKS AT RCI TECHNICAL AREA UNDER GE I RND RCI HYDERABAD

Amount

Taking out the Vacuum Circuit Breaker (VCB) of 11KV Voltage rating 400/630/800/1250 Amps, 3 phase, 50Hz from 11 KV HT panel board for overhauling of VCB, carrying out visual check of panel, inspect, clean and tightening of bolts of busbar chamber, cleaning and inspecting CT & PT's, checking cable tightness, control circuit and servicing of VCB for the following :- (a) Drawout mechanism (b) Driving mechanism (c) Cleaning of insulated parts (d) Functional testing of VCB

(g) Note : Replaceable parts will be measured and paid separately under respective items and the labour element for taking down and fixing is be deemed to be included in the quoted rate. (ii) Overhauling should be done through authorized OEM or channel partner of OEM or State Government Approved License holder. (VCBs of make : Schneider Electric, Siemens, Crompton Greaves, Areva, Kirloskar and Alstom ) (h) No payment shall be made towards this item till submission of satisfactory test report duly verified by Engineer-in-Charge.

Testing and calibration of 11 KV HT VCB panel protection relays, over current / earth fault, tripping and closing circuits by primary and secondary injection method for their optimal tripping and closing performance including resetting of the time whenever required including submission of test report in duplicate complete all as directed. Note : (a) Measuring instrument required for calibration and testing shall be arranged by the contractor without extra cost. (b) Calibration should be done by OEM / State Electricity Board licensed service Engineer. (c) No payment shall be made towards this item till submission of satisfactory test report duly verified by Engineer-in-Charge.

Supply & fix in repairs LED indicating lamps of red / yellow / blue / green / amber with bulbs complete all as specified. Make : AE / IMP / MECO / L&T / SIEMENS / C&S

Supply & Fix in repairs digital / analog type Single phase Ammeter / Voltmeter, square type of size 96 x 96 mm with CTs of suitable ratio all as specified. Make : L&T / AE / MECO / SIEMENS / RISHABH / CONZERV / ENERCON

Supply & Fix in repairs digital / analog type Three phase Ammeter / Voltmeter, square type of size 96 x 96 mm with CTs of suitable ratio all as specified. Make : L&T / AE / MECO / SIEMENS / RISHABH / CONZERV / ENERCON

Supply, repair / replacement of unserviceable epoxy of VCB at MEMS Sub Station all as specified and as directed.

Supply & Fix in repairs TNC (Trip Neutral Close) switch for HT VCB all as specified.

Supply & Fix in repairs panel type strip heater 80 W capacity all as specified.

Supply & Fix in repairs thermostat all as specified.

Supply & Fix in repairs 11KV, 400 / 630 / 800 Amps HT VCB Vacuum Interrupter Bottles complete all as specified.

Supply & Fix in repairs 11 KV HT VCB panel body insulators of existing size complete all as specified.

Supply & Fix in repairs 110 Volts DC Shunt Trip Coil complete all as specified.

Supply & Fix in repairs 110 Volts DC Closing Coil complete all as specified. Make for item 6 to 13 : Schneider / ABB / ALSTOM / CG/ Kirlosker / Siemens / Areva / AE /GE / C&S / L&T / Switron / IndoAsian

S&F in repairs of Auxiliary Power Supply system of 110 Volts for protection of VCB panel including synthetic rubber chamber, testing and commissioning complete by using a set of 55 No maintenance free lead acid batteries of 2 volts 80AH capacity each complete all as specified and directed. Make of Battery : AMARARAJA / EXIDE Note : Quoted rate shall deemed include cost of 55 No battery bank for each auxiliary power supply system

S&F in repairs, of battery charger of battery banks, 110V DC 20 A float cum boost charger control supply including testing the battery charger complete all as directed.

Inspection, man day service charges and overhauling charges for Auxiliary power supply and battery charger of battery banks, including checking and repair of float mechanism, booster mechanism, replacement of burnt PCBs, rectifiers, contacts (of any type and rating), control wiring with existing rating of copper cable, replacement of lugs, indicators, switches etc., including testing the battery charger after repair complete all as directed.

Taking out unserviceable FRP bushing 11 KV from the panel, supply and fix new FRP bushing complete all as specified and directed

Disconnecting electric supply to HT VCB, removing the unserviceable spring charge gear, supply and fix new Spring Charge Gear and reconnecting to power supply including testing complete all as directed. Make : Crompton Greaves or equivalent as approved by GE

Complete removal of existing paint from HT 6 pole structure including all connected mild steel structures and applying two coats of aluminium paint over a coat of red oxide primer, marking the pole in white capital letters including painting the pole with black bituminous paint from ground level to a height of 1.5 metre and marking two No alternative yellow strips of 300mm high on black painted portion of the pole with yellow synthetic enamel paint at a height of 0.3 metre and 0.9 metre from ground level complete all as specified and directed.

All as per item No 20 above but for HT 4 pole structure.

All as per item No 20 above but for HT 2 pole structure.

Complete removal of existing paint from HT mild steel single electric pole 11 metre long and connected cross arms, pipe etc., and applying painting two coats of aluminium paint over a coat of red oxide primer including marking the pole in white synthetic enamel paint with capital letters and painting the pole with black bituminous paint from ground level to a height of 1.50 metre and fixing with two Nos yellow radium strips of 100 mm high at a height of 1.20 metre and 1.40 metre from ground level complete all as specified and directed.

Taking out the sample of transformer oil from Distribution Transformer and conducting the Dielectric Strength (BDV) test, Sludge and Acidity test from Power Grid Lab and submit the report complete all as directed.

Taking out the sample of transformer oil from Power Transformer and conducting the Dissolved Gas Analysis test from Power Grid Lab and submit the report complete all as directed. Note for Sl Item No 23 & 24 : No payment shall be made towards these items till submission of satisfactory test report from Power Grid Lab and duly verified by Engineer-in-Charge.

Supply, install, test and commissioning of Air Break Switch, Gang Operated, triple pole, rocking type, mechanically operated, mounted on six insulators (2 No insulator in each phase) with aluminium jumpers of suitable size etc., and mild steel galvanized steel frame with operating mechanism worked from ground level including operating rod for current rating upto 200 Amps, 11000 Volts complete with locking arrangement, mild steel clamps, bolts, nuts and washers etc., complete including taking down unserviceable Air Break switch, GOD after disconnecting electrical connections all as specified and directed.

S&F in repairs, lightening arrestor, expulsion type complete with all fittings suitable for 11 KV, transmission class with discharging capacity of 65 Kilo Amps, conforming to IS 3070 including testing on 2 pole / 4 pole structure complete all as specified and as directed.

S&F in repairs, Disc type insulator, porcelain, vitreous 145 mm high and 255 mm dia ball and socket type, white, brown or green 'single disc' assembly for tension with tension clamps for conductors, working pressure 11000 volts complete all as specified and as directed.

S&F in repairs, Pin type, porcelain, vitreous, white, brown or green insulator 150 mm height, 150 mm dia for 11000 volts grade including one galvanized mild steel spindle, two galvanized iron washers and one galvanized iron nut complete all as specified and as directed.

M&L, Post top, porcelain / polymeric, vitreous brown insulator suitable for 11000 volts grade including galvanized mild steel clamps, bolts, nuts and washers complete all as specified and as directed.

Disconnecting and taking out defective 11KV Air Break Switch assembly from HT 2 pole/4 pole structures, scrubbing and cleaning dust / carbon deposits from all GI / copper moving and fixed parts with sand papers / clothes and greasing / lubricating the moving / fixed linkage, necessary welding to mild steel structure / GI tubings if required, refixing the same in position with new connecting jumpers, bolts, nuts, washers of suitable size, replacement of defective moving and fixed contacts for proper operation of GOD, including testing and commissioning etc., complete all as specified and directed. Note : (a) Replacement of unserviceable spare parts such as fixed and moving contacts and insulators will be measured and paid separately. (b) The cost of any other spare parts which are not covered in Note No 35 (a) above but are required to make the GOD serviceable condition is deemed to be included in the quoted rate.

Supply & Fix in repairs, female contact suitable for 11KV, 200Amp horizontally operated gang operated device complete all as directed.

Supply & Fix in repairs, moving male contact suitable for 11KV, 200Amp horizontally operated gang operated device complete all as directed.

M&L in repairs, Earthing complete with galvanized steel earth plate electrode of size 60cm x 60cm x 6mm thick buried directly in ground (earth pit not less than 2.25m deep below the normal ground level) with top edge of plate not less than 1.5m below normal ground level connected to GI strip 25 x 4 mm as earth lead by means of bolts, nuts, washers and check nuts made out of galvanized iron or steel all as shown on Electrical Plate No. 3 of SSR Part-I including testing on completion complete all as specified and directed.

Note 1 : The unit rate shall also include for earth work in any type of soil, PCC 1:3:6 type C1 chamber, 50mm thick RCC 1:2:4 type B-1 using 20 mm graded stone aggregate cover slab reinforced with 6 Nos of 8 mm dia TMT bars both ways, funnel with watering pipe 20 mm dia medium grade, GI protection pipe light grade 40 mm dia and wire mesh complete in addition to item No. 1(a) to (e) of preamble (Notes) under sub-heading earthing, specified on Sl Page No. 422 of SSR Part-II. Note 2 : Earthing lead beyond 7.5m will be measured and paid separately.

S&F GI Earth strip 25 x 4mm as in earth continuity conductor fixed to wall on battens or buried on ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing complete all as specified and directed.

M&L in repairs, Earthing complete with copper earth plate electrode of size 600 x 600 x 3.15mm thick buried directly in ground (earth pit not less than 2.25m deep below the normal ground level) with top edge of plate not less than 1.5m below normal ground level connected to copper strip 20 x 3 mm as earth lead by means of bolts, nuts, washers and check nuts made out of galvanized iron or steel all as shown on Electrical Plate No. 3 of SSR Part-I including testing on completion complete all as specified and directed.

Note 1: The unit rate shall also include for earth work in any type of soil, PCC 1:3:6 type C1 chamber, 50mm thick RCC 1:2:4 type B-1 using 20mm graded stone aggregate cover slab reinforced with 6 Nos of 8mm dia TMT bars both ways, funnel with watering pipe 20mm dia medium grade, GI protection pipe medium grade 25mm dia and wire mesh complete in addition to item No. 1(a) to (e) of preamble (Notes) under sub-heading earthing, specified on Sl Page No. 422 of SSR Part-II. 2. Copper earth strip beyond 7.5m will be measured and paid separately.

M&L, copper earth strip 20 x 3 mm buried in ground or fixed on wall or drawn through pipe or fixed to poles or any other indicated situation for earthing complete all as specified and as directed.

Disconnecting the defective RMU from the main supply, service engineer to be checked / inspected the RMU at DSC Line and including testing and commissioning the defective RMU in its original position and charged. Note : (a) Replacement of unserviceable spare parts will be measured and paid separately.

Overhauling of Ring Main Unit, 11 KV, voltage rating 400 / 630 / 800 / 1250 Amps, 3 phase, 50Hz, carrying out visual check of panel, inspect, clean and tightening of bolts of bus bar chamber, cleaning and inspecting CT & PT, checking cable tightness, control circuit and servicing of breaker for the following:- (a) To check the over current and earth fault relays testing with Primary current injection (b) To test current transformer ratio (c) Cleaning of insulated parts (d) Functional testing of Ring Main Unit

(e) Measuring of IR values and contact resistance, checking of inner lock within panel board, checking of indicating lamps and zero error of all accessories, cleaning dusting, physically checking for any damages, tightening of bolts, nuts, greasing and lubricating by SIEMENS grease of all moving parts, lubricating spring charge mechanism by suitable oil, checking and tightening of control wiring for its normal functioning, applying petroleum jelly for top and bottom arm, female contacts and jaw contacts, checking of ON/OFF mechanism mechanically by operating the breaker tripping coil, closing coil manually, checking of breakers closing and tripping operation through protecting relays (both over load and earth fault relays) meggaring the breakers, vacuum bottles checking ON/OFF indicators, replacing unserviceable parts i.e. indicating lamps, ammeter, voltmeter, ON/OFF switch, vacuum bottles,, strip heater, body insulators, insulating rods etc to make RMU in trouble free condition, assembling the breaker, testing and commissioning the system complete all as directed.

Notes : (i) Replaceable parts will be measured and paid separately under supply only items and the labour component for taking down and fixing shall be deemed to be included in the quoted rate. (ii) Overhauling should be done through authorized OEM or channel partner of OEM or State Government approved License holder. Make of RMUs : Siemens/ Areva/ CG

Disconnecting the main power supply from MRS and repair / replacement of 2 pole structure's 100 / 50 channel with 6 Nos clamps, nuts, bolts, washers etc for fixing of AB Switch and HT cable in 2 pole structure for alternate supply to user of ELSEC, rec-connecting, testing and restored the supply all as specified and directed by the Engineer-in-Charge.

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