REPAIR / REPLACEMENT OF EARTHING PITS, CHANGE OVER SWITCHES AND MAIN SWITCHES, LT CABLE, LT PANEL BOARD AND ALLIED WORKS AT AF STN JODHPUR

Amount

Checking of earthing resistence of 250 critical earthing and E-N voltage monthly with caliberated earth tester meter and multimeter including recharging of earthing with chemical, maintaing the earth testing record, rectification of earthing related fault also complete all as specified and directed by the Engineer-in-Charge. NOTE:- (a) Testing record and rectification of earthing shall be signed by user and JE (E/M) and verified by Engineer-in-charge. (b) Measurement of one month shall be treated as one Job. (c) Chemical required for recharging of earthing shall be paid separately.

Checking of earthing resistence of 1250 earthing and E-N voltage monthly with caliberated earth tester meter and multimeter including recharging of earthing with chemical, maintaing the earth testing record, rectification of earthing related fault also complete all as specified and directed by the Engineer-in-Charge. NOTE:- (a) Testing record and rectification of earthing shall be signed by user and JE (E/M) and verified by Engineer in charge. (b) Measurement of one month shall be treated as one Job. (c) Chemical required for recharging of earthing shall be paid separately.

Material & labour in repairs for earthing complete with copper earth plate electrode 60cm x 60cm x 3.15 mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5m below normal ground level, connected to and including earth lead of copper strip 20 mm X 3 mm by means of bolts, nuts, check nuts and washers of galvanized iron or steel all as shown in electrical plate No 3 of SSR Part-I connected to earthing test point all as specified or indicated including testing on completion and excavation and earth work in any type of strata, PCC 1:3:6 type C1 in chamber, precast RCC cover 50mm thick in cement concrete 1:2:4 type B1, reinforced with welded steel wire fabric or XPM (Weight not less than 4 Kg/Sqm) with cast iron frame, funnel with wire mesh, 20mm bore GI pipe medium grade watering pipe, lugs, 40mm bore GI pipe medium grade protection pipe up to 7.5m complete all as specified and directed by the Engineer-in-Charge NOTE :- The rate of above Item includes the cost of earth lead and GI protection pipe up to 7.5 Metres. Copper strip beyond 7.5 Metre shall be measured and paid for separately.

Material & labour in repairs earthing complete with galvanised steel earth electrode 60cmx60cmx6mm buried directly in ground vertically to depth not less than 2.25m below normal ground level with top edge of the earth plate at a depth not less than 1.5m below ground level connected to and including GI earth strip 32mm x 6 mm, by means of nuts, bolts, check nuts and washer etc, made of GI and connected to test point and earth dolly all as shown in electrical plate No. 3 SSR Part-I 2009 and specified or indicated including excavation and earthwork in any type of soil PCC (1:3:6) Type C1 in chamber, precast RCC 50 mm thick in cement concrete (1:2:4) type B1, reinforced with welded steel wire fabric or XPM (Weight not less than 4.00 Kg/Square metre) with cast iron frame, funnel with wire mesh, 20mm bore medium grade GI watering pipe, lugs, 40 mm bore medium grade GI protection pipe, test point etc. complete all as specified and directed. NOTE :- The rate of above Item includes the cost of earth lead and GI protection pipe up to 7.5 Metres. GI strip beyond 7.5 Metre shall be measured and paid for separately.

Material & labour in repairs bore earthing 150 mm dia buried by vertical boring machine, depth 50 mtr below ground level using earth electrode 50mm dia GI pipe medium grade duly drilled hole of 12mm dia ,15cm C/C on both side of the pipe including lowering in bore well upto the depth of 49mtr and one metre above the ground level . The pipe electrode should be filled around commercial salt, charcoal dust , copper sulphate and magnisium phosphate of 30 cm layer each upto the full length of pipe. The bore well should have 12 metre of length 150mm dia MS pipe for protection of bore well. Welding of GI strip 50x6 mm on earth electrode GI pipe 50mm dia upto the 10 metre below ground level and 15 metre from the bore well to test point, and PCC foundation sorrounding the bore well 60x60x30 cm, necessary water connection by GI steel tubing 15 mm dia medium grade complete all as specified and directed. Note :- If GI strip required more than 35 metres , than length exceeds 35metres shall be measured and paid separately.

Material & labour for replacement of test point terminal block made of gun metal or phosphorus bronze size 75mm x 75mm x 25mm drilled and screwed including 3 nos. 8mm dia 25mm long hexagonal head screw. As required with all accessories complete all as specified and directed by the Engineer-in-Charge.

Material & labour for replacement of copper strip 20mmx3mm complete with protection sleeves, saddles, seperator and fixing screws at surrounding inside and outside the building complete all as specified and directed by the Engineer-in-Charge.

Material & labour for replacement of galvanised steel strip 32mmx6mm complete with protection sleeves, saddles, seperator and fixing screws at surrounding inside and outside the building complete all as specified and directed by the Engineer-in-Charge.

Material & labour for replacement of galvanised steel strip 25mmx 4mm complete with protection sleeves, saddles, seperator and fixing screws at surrounding inside and outside the bldg complete all as specified and directed by the Engineer-in-Charge.

Material & labour for replacement of 16 sqmm multistranded flexible copper conductor (heavy duty) with suitable mounting accessoreis, the mounting clamp should be Non conductive metarial used in earthing complete all as specified and directed by the Engineer-in-Charge. .

Supply & fixing for replacement of Seperator U type, made of porcelain, used for mounting Earth strip, with all nut bolts and connecting accessories complete all as specified and directed by the Engineer-in-Charge.

Dismantling of old unserviceable PCC earthing chamber, and Material & Labour for construction of PCC Chamber with precast cover in replacement, PCC chamber made out of PCC 1:2: 4 type B1 using 20mm graded crushed stone aggregate and cover shall be 40mm thick RCC Pit cover made of precast cement concrete cover slab type B-1 (PCC 1:2:4) using 20 mm graded crushed stone aggregate , reinforced with mild steel XPM weighing not less than 4 kg/ Sqm, including necessary form work & surfaces of PCC Chamber & Cover Shall be finished smooth without using extra cement , Exposed surfaces shall be painted with three coats of white wash complete , minimum dimention of PCC Chamber shall not be less than as specified & shown on Plate No 3 of SSR Part I (2009) complete all as specified and directed by the Engineer in Charge. Note : The rate quoted for this item also includes necessary excavation and earth work, disposal of surplus soil/material to a distance not exc. 50 metres complete.

Material & labour for replacement of aluminium strip 25mmx 3 mm complete with protection sleeves, saddles, seperator and fixing screws at surrounding inside and outside the bldg complete all as specified and directed by the Engineer-in-Charge.

Material and labour for top up of Potassium Nitrate (commercial name kalmi shora) in the earthing chambers for improvement of the existing earthing resistence complete all as specified and directed by the Engineer-in-Charge.

Material and labour for replacement of 20-25mm thick kota stone earth pit cover of size 2 feet x 2 feet complete all as specified and directed by the Engineer-in-Charge.

Material & labour for repair of copper earthing strip joint with Brazing (1 inch x 1 inch ) including all accessories and T&P complete all as specified and directed by the Engineer-in-Charge.

Material & labour for replacement of ground enhancement (GEM is a low-resistance, non-corrosive, carbon dust-based material that helps improve grounding effectiveness, especially in areas of poor conductivity). GEM contains cement, which hardens when set to provide a permanent, maintenance free, low-resistant grounding system that never leaches or washes away. GEM does not adversely affect soil and will not leach ions or contaminate ground water) material for recharging of earthing pit complete all as specified and directed by the Engineer-in-Charge.

Material & labour for replacement of galvanised steel tubing of size 40 mm bore, light grade, for protection of GI strip/cable, laid in trenches/road crossing/floor or fixed to pole/wall with all fittings complete all as specified and directed by the Engineer-in-Charge.

Supply & fixing for replacement of Copper rod 25mm diameter and 2.5 metres length used in GEM earthing complete all as specified and directed by the Engineer-in-Charge.

Material & labour for replacement of PVC/rubber pipe/sleeve for protection of Earth strip and insulation purpose complete all as specified and directed by the Engineer-in-Charge.

Opening and reassembling of voltage stablizer including necessary T&P for fault detection of non working existing Voltage stabilizers, oil cooled/air cooled of different sizes at different locations including replacement of unserviceable spare parts under respective items given in BOQ as supply only, including testing on full load, commissioning of the stabilizer to the entire satisfaction of Engineer-in-Charge complete all as specified and directed. Note :- (i) Spare part used in repair work shall be measured and paid seprately under respective items and make of spare part shall be as per existing Voltage stabilizers.

Supply only Push Button switch

Supply only Auto manual switch

Supply only Micro switch

Supply only Panel lamp

Supply only Voltmeter

Supply only Ampre meter with C.T

Supply only PCB holder for balanced type stabilizer

Supply only Carbon brush

Supply only Trigger Transformer

Supply only Rotary Switch 5 Amp for R Y B Phases

Supply only Shunt transformer

Supply & fixing in repair Electronic circuit card (PCB) for voltage stablizer complete all as specified and directed by Engr-in-charge.

Supply & fixing in repair Electronic circuit card (PCB) digital type double display combined microprocessor based unit complete all as specified and directed by Engr-in-charge.

Supply & fixing in repair Electronic circuit card (PCB) digital type single display combined microprocessor based unit complete all as specified and directed by Engr-in-charge.

Supply & fixing in repair Servo motor 3 KG torque with gear complete set all as specified and directed by Engr-in-charge

Supply & fixing in repair Servo motor 10 KG torque with gear complete set all as specified and directed by Engr-in-charge

Supply & fixing in repair Drive assembly 10 KVA to 100 kVA per phase of servo voltage stabilizer complete all as specified and directed by Engr-in-charge

Supply & fixing in repair Drive assembly 100 KVA to 400 KVA per phase of servo voltage stabilizer complete all as specified and directed by Engr-in-charge

Material & labour for prepration of old painted surfaces of voltage stabiliser of various capacity by removal & scrapping of existing old paint complete and applying spray painting (with spray gun and compressor) with two coat of synthetic enamel paint (first quality) over a coat of red oxide primer & writing of MES/SM No on the voltage stablizer complete all as specified and directed by Engr-in-charge

Material & labour for replacement of oil for toping up of voltage stabiliser oil having dielectric strength not less than 50 KV filling to Stablizer at various sub stations complete all as specified and directed by Engr-in-charge.

Disconnecting & dismantling the transformer of 200 KVA Stablizer including taking out burnt copper winding from transformer of Stablizer and material & labour for rewinding the same with super enamelled copper wire of existing size, all as per latest engineering practice and IS code complete all as specified and directed by Engr-in-charge.

Supply & fixing in repairs variac suitable for 5 KVA to 25 KVA Stabilizers as per existing at site complete all as specified and directed by Engr-in-charge.

Supply & fixing in repairs variac suitable for more than 25 KVA upto 100 KVA Stabilizers as per existing at site complete all as specified and directed by Engr-in-charge

Supply & fixing in repairs Variac suitable for more then 100 KVA to 750 KVA Stabilizers as per existing at site complete all as specified and directed by Engr-in-charge

Supply and fixing in repairs of MCCB 125 Amp, 4 pole, 415 V, 25 KA with fixed type thermal magnetic release, complete all as specified and directed by the Engineer-in-Charge. Note: ICS = ICU 100%

Supply and fixing in repairs of MCCB 100 Amp, 4 pole, 415 V, 25 KA with fixed type thermal magnetic release, complete all as specified and directed by the Engineer-in-Charge. Note: ICS = ICU 100%

Supply and fixing in repairs of MCCB 63 Amp, 4 pole, 415 V, 16 KA with fixed type thermal magnetic release, complete all as specified and directed by the Engineer-in-Charge. Note: ICS = ICU 100%

Supply, install, testing and commissioning in repairs on load change over switch 100 Amps, four pole, 415V AC, 50HZ etc in sheet metal enclosure complete all as specified and directed by Engr-in-charge

Supply, install, testing and commissioning in repairs on load change over switch 125 Amps , four pole, 415V AC, 50HZ etc in sheet metal enclosure complete all as specified and directed by Engr-in-charge

Supply, install, testing and commissioning in repairs on load change over switch 200 Amps , four pole, 415V AC, 50HZ etc in sheet metal enclosure complete all as specified and directed by Engr-in-charge

Supply, install, testing and commissioning in repairs on load change over switch 315 Amps , four pole, 415V AC ,50HZ etc in sheet metal enclosure complete all as specified and directed by Engr-in-charge

Supply, install, testing and commissioning in repairs on load change over switch 400 Amps, four pole, 415V AC, 50HZ etc in sheet metal enclosure complete all as specified and directed by Engr-in-charge

Supply & fixing in repairs 15mm bore, medium grade, galvanised iron pipe, with all fittings & fixed to walls & ceiling or laid in floor complete all as specified & directed by the Engineer-in-Charge.

Supply and fixing in repairs 15 mm bib tap standard of PTMT any colour high pressure screwed for iron pipe & fixed minimum weight 90gm/each complete all as specified and directed.

Material and labour for taking out 15 mm dia branch connection from existing pipe line upto 40 mm dia including cutting of pipe line, inserting Tee with all necessary fittings etc complete all as specified & directed by the Engineer-in-Charge.

Nvimal Engineers and Contractor