REPAIR/MAINTENANCE OF TRANSFORMERS, VCBS AND OTHER MISC HT MAINT WORK AT VSN NAGPUR

Amount

Material & labour for dehydration and filtration of transformer oil of distribution/power transformer of different capacities through stream line filter unit to increase di -electric strength (BDV) of transformer oil not less then 40 KV for 1 minute at 2.5 mm gap including topping up transformer oil to the required level as indicated to each transformer and testing, transformer oil before and after filtration submission of records of test in duplicate complete all as specified and directed by Engr-in-Charge. Notes: (i) Oil samples are to be collected from top and bottom of oil tank and test results to be submitted by the contractor for each sample before and after filtration. (ii) New transformer oil required for top up will be measured & paid separately

Material & labour for dismantling the 33 KV HT Supply and isolating the power transformer of capacity 750/1500 KVA draining out the insulating oil from the tank for dehydration. Opening the top cover, removing the damaged gasket and replace the same size / thickness of new gasket of transformer, conservatory tank oil indicator, inlet & outlet valve gasket in position replacing the defective, burnt bushes with gaskets and brass studs if required re filling back drained transformer oil and ensuring no leakages of oil from any part of the transformers and then testing energizing complete all as directed. Notes : (i) Fresh transformer oil for topping up will be measured and paid separately. (ii) Bushes and brass studs will be measured and paid separately.

Material & labour for dismantling the 11 KV HT Supply and isolating the distribution transformer of capacity 100/160/200/315/500 KVA draining out the insulating oil from the tank for dehydration. Removing the damaged gasket and replace the same size / thickness of new gasket of transformer, conservatory tank oil indicator, inlet outlet valve gasket in position replacing the defective, burnt bushes with gaskets and brass studs if required re filling back drained transformer oil and ensuring no leakages of oil from any part of the transformers and then testing energizing complete all as directed. Notes : (i) Fresh transformer oil for topping up will be measured and paid separately. (ii) Bushes and brass studs will be measured and paid separately.

Material and labour for replacing Silica gel air breather containers clear view type, first fill of good quality silica gel, of the following capacities.

100 KVA to 500 KVA transformer

1500/750 KVA transformer

Material & labour for disconnecting and dismantling & complete overhauling of Transformer capacity 100 to 500 KVA, after disconnecting of electric supply and earth connections including transportation to work shop, opening the top of transformer, drained out transformer oil, lifting/removing of top cover of transformer & cores with chain pulley blocks/crane, cleaning of sludge and washed down with the help of spray of clean oil and re-assembling of transformer with S&F of new gasket set assembly, replacement of nuts, bolts and washers as required, re filling of Transformer oil after centrifuging at satisfactory dielectric strength complete after electric connections and testing all as specified and directed.

Material & labour for disconnecting and dismantling & complete overhauling of Transformer capacity 750 KVA, after disconnecting of electric supply and earth connections including transportation to work shop, opening the top of transformer, drained out transformer oil, lifting/removing of top cover of transformer & cores with chain pulley blocks/crane, cleaning of sludge and washed down with the help of spray of clean oil and re-assembling of transformer with S&F of new gasket set assembly, replacement of nuts, bolts and washers as required, re filling of Transformer oil after centrifuging at satisfactory dielectric strength complete after electric connections and testing all as specified and directed

Material & labour for Rewinding of transformer Step up / down , HV Coils complete with existing size/ electrolytic copper conductor design with TPL covering, re-assembling of newly wounded coils on core in position including re- insulation, oven baking and testing all as specified and directed.

Material & labour for Rewinding of 50-500KVA transformer Step up / down , LV Coils complete with existing size/ electrolytic copper conductor design with TPL covering, re-assembling of newly wounded coils on core in position including re- insulation, oven baking and testing all as specified and directed.

Material & labour for Filling of new transformer oil confirming IS 335/93 topping of transformer and OLTC tank through stream line filter shaving dielectric strength not less than 60 KV complete including centrifuging of oil (if required) up to getting dielectric strength near 60 KV all as specified and directed.

Material & labour for insulation of core, bushing,Tap changer etc all as specified and directed.

Material & labour for preparation of old painted surfaces including Scraping and removing old paint and painting of transformers by spraying with two coats of super enamel paint of smoke grey colour for the following capacities :-

100 KVA to 160 KVA transformer

200 KVA to 315 KVA transformer

500 KVA to 750 KVA transformer

Material & labour for earthing complete with GI earth electrode 60 cm x 60 cm x 6 mm thick and burried directly in ground (earth pit not less than 2.25 meters deep below ground level) with top edge of the plate not less than 1.5 meters below normal ground level, connected to GI earth plate with GI strip of size 25x4 mm by means of bolts, nuts and washers all as shown in electrical plate No.3 complete all as specified including excavation and earth work in any type of soil, PCC pit (1:3:6) type C-1 in cement concrete 40 mm thick precast RCC cover in (1:2:4) type B-1 reinforced with 8 mm dia MS round bar @ 75 c/c both ways with 01 No lifting handle of 12mm dia MS plain bar, GI pipe 32 mm dia light grade for GI strip protection up to 7.5 mtr and GI tubing 20 mm for watering including GI funnel with wire mesh etc complete all as specified and directed. Note : GI strip of size 25 x 4 mm beyond 7.5metre shall be measured and paid separately

Material & labour for galvanised iron strip as earth continuity conductor or main earthing lead of size 25 x 4 mm complete all as specified and as directed.

Material & labour for earthing complete with copper earth plate electrode 60 cm x 60 xcm x 3.15 mm thick and burried directly in ground (earth pit not less than 2.5 meters deep below ground level) with top edge of the plate not less than 1.5 meters below normal ground level, connected to copper earth plate with copper strip of size 20 x 3 mm by means of bolts, nuts and washers all as shown in electrical plate No.3 complete all as specified including excavation and earth work in any type of soil, PCC pit (1:3:6) type C-1 in cement concrete 40 mm thick precast RCC cover in (1:2:4) type B-1 reinforced with 8 mm dia MS round bar @ 75 c/c both ways with 01 No lifting handle of 12mm dia MS plain bar, GI pipe 32 mm dia light grade for copper strip protection up to 7.5 mtr and GI tubing 20 mm for watering including GI funnel with wire mesh etc complete all as specified and directed. Note : Copper strip of size 20 x 3 mm beyond 7.5metre shall be measured and paid separately

Material & labour for copper strip as earth continuity conductor or main earthing lead of size 20 x 3 mm complete all as specified and as directed.

Servicing of CT/PT of 33 KV capacity including replacement of old gasket with new gasket of same type/size and topping up of new oil of same grade and replacement of old nut bolt washers etc complete all as specified and directed. Note : Servicing will be done by authorised dealer only

Material & labour for replacement of LT bushing out door/In door type 1.1 KV LV 250 Amps brass metal part as per IS 3347/1967 complete with bushing brass stem nut,bolt,washers, brass studs and gasket etc complete all as specified and directed.

Material & labour for replacement of HT bushing out door/In door type 11 KV HT 250 Amps brass metal part as per IS 3347/1967 complete with bushing brass stem nut,bolt,washers, brass studs and gasket etc complete all as specified and directed.

Material and labour for Silica gel of good quality filling into existing breather containers by removing old silica gel complete all as specified & directed.

Material & labour for replacement of marsheling box for Power transformer of capacity 750 KVA as per existing transformer complete all as specified and as directed.

Repair/Maintenance and complete overhauling of HT VCB’s 33 KV including dismantling of operating mechanism, well cleaning with CRC 226, replacing unserviceable parts and accessories like spring, gasket, coils, nuts, bolts and washers etc, oiling and greasing of moving parts, re-assembling, fine setting of mechanism, well cleaning and de-carbonizing of arc control pot, fixed and moving contact including checking testing, tripping check of HT VCB’s making perfect operational condition in manual and electric mode etc complete all as directed. Note:- Spare parts for VCB and calibration of relays will be measured and paid separately.

Repair/Maintenance and complete overhauling of HT VCB’s 11 KV including dismantling of operating mechanism parts, well cleaning with CRC 226, replacing unserviceable parts and accessories like spring, gasket, coils, nuts, bolts and washers etc, oiling and greasing of moving parts, re-assembling, fine setting of mechanism, well cleaning and de-carbonizing of arc control pot, fixed and moving contact including checking testing, tripping check of HT VCB’s making perfect operational condition in manual and electric mode etc complete all as directed. Note:- Spare parts for VCB and calibration of relays will be measured and paid separately.

Repair/Maintenance and complete overhauling of HT Isolating Load break switch/RMU 11 KV including dismantling of operating mechanism parts, well cleaning with CRC 226, replacing unserviceable parts and accessories like spring, gasket, coils, nuts, bolts and washers etc, oiling and greasing of moving parts, re-assembling, fine setting of mechanism, well cleaning and de-carbonizing of arc control pot, fixed and moving contact including, Complete checking of ON/OFF operation. Complete checking of earth switch operation, also testing of all parts, final tripping check and making perfect operational condition complete all as directed. Note:- Spare parts for Load break switch/RMU and calibration of relays will be measured and paid separately.

SUPPLY ONLY SPARES FOR SERIAL ITEM NO. 21,22 & 23.

Toggle lever Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Catch lever Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Plunger assembly Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Steel Pin (Special) Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Catch lever spring Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Latch Lever Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Tapper pin Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Connecting Link Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Reset Spring Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Spring Charging Handle Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Gear Main Shaft Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Spring Charging main gear assembly with bearing Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Spring charging motor Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

On/Off indicator Glass Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Trip Lever button assembly Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Big gear bearing Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Carbon brush Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Small Gear bearing Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Tripping/Closing coil with plunger assembly Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Rectifier for Motor circuit Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Trip and close circuit Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Main gear pin Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Door gasket Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Push button housing Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Push button lever with spring Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Trip and close Switch Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

2 NO + 2 NC Limit Switch Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Indication Lamp Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Interrupter Chamber top insulator Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Support Insulator Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Auxilary switch Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Locate/Remote switch Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

FRP Rod Make : CG/SIEMENS/ABB/AREVA/MEGAWIN

Hardware (Nut bolt, washer, splitpin, circlip,cotterpin.)

LT RG tape wounded current transformer up to 500/5, 10 VA with suitable connection and testing all as directed.

LT RG tape wounded current transformer up to 250/5, 10 VA with suitable connection and testing all as directed.

Spring Bushing for VCB breaker ON and OFF Mechanism in existing VCB panel complete all as specified and directed.

HRC Fuse of 10 Amps rated capacity suitable for HT VCB Panel complete all as specified and directed.

AC Panel Heater with thermostat suitable for HT VCB Panel complete all as specified and directed.

11 KV HT Fuse 63 Amp

TNC Switch 30 V DC 2 Pole

Power Pack with battery backup 230 VA AC/30 V DC suitable for protection system

11 KV Male/Female Moving Contact

Material & labour including tools and plants for calibration and setting as per fault level of relay of any type for HT VCB/RMU 33 KV and 11 KV with suitable instrument and submitting report after calibration complete all as specified and directed.

Material & labour for Spray painting the VCBs two coats of synthetic enamel paint of matching with existing colour including scraping and removing the old paint from existing surfaces complete all as specified and directed.

Taking out existing HT cable of sizes up to 300 Sqmm 3 core from duct/floor/trenches and re-laying the same serviceable cable after fault rectification in existing position with supply and fixing connecting materials such as thimbles, lugs, nuts, bolts and washers as required at site all as specified and directed.

Excavation in trenches not exceeding 1.5 meter wide and not exceeding 1.5 meter in depth for laying of cables and getting out in hard/dense soil complete all as specified and directed

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

Removing excavated soil to a distance not exceeding 50 meter and depositing where directed at a level not exceeding 1.50 meter above the starting point complete all as specified and directed

Material & labour for detection of fault through fault locating high voltage mobile machine to locate the fault in 11 KV HT/LT cable by giving high voltage surge and to find out exact location of fault all as directed. Note : The quoted rate includes transportation, charging machine upto detecting fault at a time and fault should be immediately located after intimation from rep of GE office

Supply & fix cable jointing kit for 33 KV grade cable for outdoor termination heat shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 3 Core 300 Sq mm complete all as specified and directed .

Supply and laying of HT XLPE insulated, screened, PVC bedded, galvanised steel strip armoured, electric power cables (heavyduty) with aluminium conductor, 11000 volts Earthed, grade cross sectional area 3 core 185 sq. mm confirming to IS 7098 laid in trenches/ ducts etc. Including taking out old faulty cable complete all as specified and directed.

Supply and laying of HT XLPE insulated, screened, PVC bedded, galvanised steel strip armoured, electric power cables (heavyduty) with aluminium conductor, 11000 volts Earthed, grade cross sectional area 3 core 120 sq. mm confirming to IS 7098 laid in trenches/ ducts etc. Including taking out old faulty cable complete all as specified and directed.

Supplying & laying un-reinforced precast concrete cable cover, class HV, Type 1, flat, size 300mm x 180mm x 40mm complete all as specified and directed

Supply & laying dry river sand as in cushioning to under ground cables all as specified and directed. Note : Punned thickness only shall be measured for payment.

Supply and fix heat shrinkable straight through cable jointing kit for 11 KV grade cable joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 Sq mm complete all as specified and directed.

Supply and fix cable jointing kit for 11 KV 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 120 to 185 Sq mm complete all as specified and directed.

Supply and fix cable jointing kit for 11 KV grade cable for outdoor termination heat shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 Sq mm complete all as specified and directed.

Supply and fixing GI pipe light grade of size 100 mm dia with necessary fittings fixed to the floor /piller/fixed on pole etc complete all as specified and directed

Material & Labour for Cement concrete 1:2:4 type B2 using 40mm graded stone aggregate for plinth protection, path etc including Demolition of old concrete complete all as specified and directed.

Material & Labour for PCC cable route indicator of PCC 1:2:4 type B1 of size 450x200x75mm with oval shape and writing the letter " HT/LT cable" with synthetic enamel paint and embedded in PCC foundation type D2 1:4:8 of size minimum 250 mm depth including necessary earth work in any type of soil complete all as specified and directed.

Material & Labour for preparation of old painted surfaces of electric HT 33 KV structures for 3 Nos power transformers and connected accessories complete of any make and height of pole up to 10 Mtrs above ground level including MS cross arms , AB switch pipe, DO fuse assembly Ms clamps brackets, bracket clamps, cable protection pipe stay etc of any sizes and shape and painting applying one coat of aluminium paint complete all as specified and directed. Note: The work has to be carried out within 6 hrs of electric shutdown accordingly manpower shall be arranged.

Note : The amount against Schedule of Credit on Page No. 39 shall be deducted from the total amount quoted against Sch 'A' while deriving lum Sum for Acceptance.

Paragon Electrotechnics

N. H. Saluji & Associates