8237-REPAIRS/ MAINTENANCE OF HT E/M INSTALLATIONS, TRANSFORMERS AND ALLIED EXTERNAL ELECTRIC SUPPLY AT VARIOUS LOCATIONS UNDER GE STM

Amount

Excavation in trenches not exceeding 1.5 m wide and not exceeding 1.5 m wide and not exceeding 1.5 m depth and getting out soft / loose soil for laying cables / pipes / erection of poles etc.

All as per item No.01 here-in-before but depth exceeding 1.5m but not exceeding 3.00m

Removing excavated material (soil) not exceeding 50 m and depositing where directed at a level not exceeding 1.5 m above the starting point.

Returning filling in soil including spreading levelling watering well ramming in layers not exceeding 25 cm each.

Supply and lay in trenches clean, dry river sand clean including spreading / levelling, cushioning for underground cables all as specified and directed. Note: Punned thickness shall be measured for payment

Supplying and laying reinforced precast concrete cable cover, class HV, type 1, Flat, size 300 mm x 180 mm x 40 mm complete all as specified and as directed

Supply and fix Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of following size:-

50 Sqmm to 95 Sqmm

120 Sqmm to 185 Sqmm

240 Sqmm to 300 Sqmm

Supply and fix cable joints out door type for underground cable including joint kits and labour complete for making joints/End Terminals suitable for HT 11 KV UG XLPE cable / armoured heavy duty Earthed cables with aluminium conductor of following sizes :-

50 Sqmm to 95 Sqmm

120 Sqmm to 185 Sqmm

240 Sqmm to 300 Sqmm

Supplying, laying(in trenches/duct/fixed to wall/pole etc or such similar position), testing and commissioning of Electric cable HT 11 kV grade (Earthed), three core, of following under mentioned nominal cross sectional area multistranded electrolytic grade aluminium conductor PVC sheathed, galvanised wire armoured, heavy duty power cable with water free retardant cross linked polyethylene (XLPE) etc all as specified and directed at site by Engr-in-charge.

HT UG Cable 3 core 95 sqmm .

HT UG Cable 3 core 120 sqmm .

HT UG Cable 3 core 185 sqmm .

HT UG Cable 3 core 240 sqmm .

Supply and install switch Air Break gang operated triple pole ,mechanically operated mounted on insulator and steel frame with operating mechanism worked from ground level complete with 9 insulators of rating upto 200 Amp 11000 volts including taking down complete all specified and directed .

S&L steel tubing galvanized, “light grade”, supplied and laid complete including fittings of size 80 mm dia all specified and directed .

S&L steel tubing galvanized, “light grade”, supplied and laid complete including fittings of size 100 mm dia all specified and directed .

S&F Pin type insulator ,porcelain,vitreous,white brown, including one galvanised mild steel spindle ,two galvanised iron washer and one galvanised iron nut ,150 mm dia and 150 mm height for 11000 volts grade including taking down old unserviceable insulators. all as specified and directed by Engr-in-Charge

S&F Disc type porcelain insulators 145 mm height 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 grade including taking down old unserviceable insulators. complete all as specified and directed by Engr-in-Charge

S&F for loop type porcelain vitreous white brown, or green insulator with over all dimension 90X140 mm clearance of hole 25.5 mm including taking down old unserviceable insulators all specified and directed .

M&L for ACSR conductor of any size for HT/LT over head line and jumpers on PCC/RCC/Steel pole including binding wires line connecting up etc of any size including taking down old unserviceable ACSR all specified and directed .

M&L Cross arms bracing 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 and directed and including painting two coats of synthetic enamel paint over a coat of red oxide primer.

Servicing GOD by carrying out lubrication of the mechanism & greasing with petroleum Gel including replacement of minimum essential spares and supply of lubricants and grease alongwith required tools.

Labour charges only restringing of ACSR conductor from pole to pole with maintain minimum sag as per HT/LT specification all as specified and as directed by Engr-in-Charge.Note: Minimum spares /lubricants and tools required for the job should be be included in the coated rates.

Supply and fix HT 11 KV Phase Seperator for fixing OH ACSR conductor 11 KV range all as specified and as directed.

Supply and Fix Tinned copper(TC) HT fuse wire 120Amps all as specified and as directed

Supply and Fix Tinned copper(TC) HT fuse wire 60Amps all as specified and as directed

Supply and Fix Tinned copper(TC) HT fuse wire 40Amps all as specified and as directed

Supply and Fix Tinned copper(TC) HT fuse wire 20Amps all as specified and as directed

Supply and fix lighting arrester expulsion type complete with all fitting transmission class ,discharge capacity 65 Kilo Amp 11000 Volts rating including dismantling old unserviceable lighting arrestor complete all as specified and directed.

S&F Expulsion type drop out fuse with all accessories and contact insulator etc fixed on HT pole rating above 10 and up to 25 Amps suitable for 11KV 3 pole with two Nos insulator per pole including dismantling old unserviceable one complete all as specified and directed.

S&F Expulsion type drop out fuse with all accessories and contact insulator etc fixed on HT pole rating above 25 and up to 50 Amps suitable for 11KV 3 pole with two Nos insulator per pole including dismantling old unserviceable one complete all as specified and directed.

S&F Expulsion type drop out fuse with all accessories and contact insulator etc fixed on HT pole rating above 50 and up to 100 Amps suitable for 11KV 3 pole with two Nos insulator per pole including dismantling old unserviceable one complete all as specified and directed.

Supply only rubber mat of size 2mtrx1mtrx19mm.Suitable for HT11 KV grade.

Service charges for carrying out servicing and overhauling of under mentioned capacities HT VCB/ LBS/RMG/RMU/CSS by drawing out the draw-out module of the breaker, carrying out complete cleaning with clean cloth & cleaning agent, lubrication of the mechanism & greasing with high temperature molly grease, testing for smoother ON/OF operation, carrying out relay calibration of protection relay by secondary current injection methods to check trip time characteristic of relays, checking of healthiness of CTs & Pts. Checking of IR value of Interrupters, healthiness of Protection Tripping of Circuit breaker etc. Choking and servicing switchgear Interlocks and Safety Like Mechanical - 1. Positive Interlock, 2.Negative Interlock, 3. Spring Discharge Interlock, 4. Padlocks, 5. Key Interlocking 6. Safety Roll in Stop, 7. Safety Roll - out Stop,8. Rating Interference Interlock. Electrical - Interlock Switches) Checking of Electrical operations of the breaker for ON/OFF & Trip operation for Incomer and Outgoing including submission of service & test reports. The servicing to be done by authorised service provider of manufacturer. Note: (i) Document in support of authorised service provier from the manufacturer shall be submitted. (ii) Service & Test report duly signed by all concerned and Enginner-in-Charge shall be submitted. (iii) Gurantee for 2 years period shall be submitted effective from the date of completion by the Contractor (iv) Spares/fittings/parts as required for replacement will be measured and paid for seperately under relevant items here in after

HT VCBs 11KV,630Amps

HT LBS 11KV,630Amps

HT RMG 11KV,630Amps

HT RMU 11KV,630Amps

HT 11KV/433V CSS

Supply and fixing and necessary testing by replacement of following items taking out old unserviciable from item ser No -32 herwe in below), for 11 KV, 3 phase, 50 Hz, HT VCB/ LBS/RMG/RMU/CSS of any type or make and capacity.

Replacement & fitting of Bearings as per existing size

Replacement & fitting of Charging Rod

Replacement & fitting of Rocker Lever

Replacement & fitting of Charging Bush

Supply and fix Power pack 110AC/110V DC all as specified and as directed

Supply and fix Bus support Insulator 11KV, 10.4 mpa tensile Strength all as existing shape and size suitable for existing systems and specified and as directed

Supply and fix Tripping coil as per existing capacity and make

Supply and fix Spring Chrging Handle assembly as per existing

Supply and fixing of Spring charging handle assembly as per existing

Supply and fixing Raising and Lowering gear operated Handle

Supply and fixing Spout bushing as per existing size and model/make

Supply and fixing CT as per existing and suitable for required capacity of CT ratio.

Supply and fixing PT as per existing and suitable for required capacity .

Complete servicing, overhauling, repairing, cleaning, oiling with setting of tripping mechanism of 415 volts 630 to 1000 Amps 50Hz any type/make Air Circuit Breakers (ACBs) including submission of service & test reports. The servicing to be done by authorised service provider of manufacturer. The details are placed at "Scope of work" as given under.

SCOPE OF WORK FOR SRL ITEM NO.32 i) Moving arcing contacts shall be checked. Cleaning of breaker with CRC-226 ii) Removal of old grease and re-greasing the same with recommended grease. iii) Check condition of arcing contact and gap between fixed and iv) Checking the reset mechanism, tripping of breaker through push button v) Checking tripping of ACB through protection release vi) Tripping of ACB manually through volt metric release. vii) Checking and adjust freeness of DN and volt metric release trip rod viii) Checking presence and proper tightening of hardware. viii) Checking presence and proper tightening of hardware. ix) Checking presence of all circlips x) Checking condition and alignment of jaw contact with cradle terminals

SCOPE OF WORK FOR SRL ITEM NO.32 Cont… xi) Checking condition of ACB wiring and replace if required xi) Checking condition of ACB wiring and replace if required xii) Checking and adjusting gap between hylam sheet and side plate xiii) Checking proper closing of all poles together xiv) Checking working of anti pumping device. xv) Checking alignment of SIC and it’s operation xvi) Checking scrapping earth alignment xvii) Checking condition of arc chutes Xviii) Checking U/V release pick up and drop off xix) Checking ACB tripping through shunt release xx) Checking continuity and proper changeover of aux contact block

SCOPE OF WORK FOR SRL ITEM NO.32 Cont… xxi) Checking of release by secondary injection for O/L, S/C, E/F xxii) Setting of release as per the load xxiii) Checking the healthiness of CTs Note: (i) Document in support of authorised service provier from the manufacturer shall be submitted. (ii) Service & Test report duly signed by all concerned and Enginner-in-Charge shall be submitted. (iii) Gurantee for 2 years period shall be submitted effective from the date of completion by the Contractor (iv) Spares/fittings/parts as required for replacement will be measured and paid for seperately under relevant items here in after

Supply and fixing by replacement of following items of Air Circuit Breaker (ACB) 415 volts 630 to 1000 Amps 50Hz,any type or make or all asper existing

Closing Relay

Terminal Adaptors (4 terminals per Phase)

Relay Module

Shunt trip Release

Auxiliary Switch

Arc Chutes

Trip Push Buttons

ACB Position Indicator

M&L for preparation of old painted surfaces ,removing dust and other deposited materials by scraping from HT tubular pole of 11 Mtr long, painting of pole with one coat of black paint upto 1 Mtr from bottom and painting with one coat of aluminium paint for the rest of the pole including cross arms cable protection pipe clamps , complete all as specified and directed by Engr-in-Charge.

M&L for servicing of four pole structure including checking/ tightening/making free for operating of GOD, insulators, lighting arrester, changing of nut/bolts if required including painting of RYB paint/tape at strip including preparation of old painted surfaces ,removing dust and other deposited materials by scraping from HT tubular pole of 11 Mtr long, painting of pole with one coat of black paint upto 1 Mtr from bottom and painting the rest of the pole including cross arms cable protection pipe clamps, bracket with one coat of aluminium paints complete all as specified and directed by Engr-in-Charge.

M&L for servicing of two pole structure including checking/ tightening/making free for operating of GOD, insulators, lighting arrester, changing of nut/bolts if required including painting of RYB paint/tape at strip including preparation of old painted surfaces ,removing dust and other deposited materials by scraping from HT tubular pole of 11 Mtr long, painting of pole with one coat of black paint upto 1 Mtr from bottom and painting the rest of the pole including cross arms cable protection pipe clamps, bracket with one coat of aluminium paints complete all as specified and directed by Engr-in-Charge.

Filtration of transformer oil of transformers step down 11 KV / 0-433 V indoor/outdoor type upto 500 KVA capacity installed at different sub stations/locations using filtration and heating equipment at site by re-circulating transformer oil heating, dehydration and improving di-electric strength of the oil to withstand 50 KV for one minute including testing of oil as specified and directed. NOTE : Transformer oil test kit shall be provided by the contractor at site for testing of oil. Test report duly marked in with No.and details of transformers before and after filteration shall be submitted while claiming payment

Removing silica gel from the breather assembly of transformer of various transformer of various capacity upto 500 KVA installed at different sub stations and providing fresh Silica gel in the breather.

Supply and filling/topping up new transformer oil conforming to IS Specification for transformer upto 500 KVAcapacity of suitable insulation garade not less than 50KV, installed at various sub stations. Note: Manufacturer's test certificate shall be provided unit rate includes for filteration also.

Dismantling and removing the following unserviceable parts/items from the transformer of various capacity including supply and fixing new parts/items

Gasket of conservator tank of transformer 63 KVA to 500 KVA capacity.

Terminal brass spindles, bush and check nuts with threads suitable for HT 11 KV primary terminals of transformer upto 500 KVA capacity.

Terminal brass spindles, bush and check nuts with threads suitable for LT 0 - 433 Volt secondary terminals of transformer upto 500 KVA capacity.

M & L for replacement of breather assembly of size 50mm dia, min 250mm long for transformer complete all as specified and directed

M & L for replacement of transformer temperature gauge dial type having temp range 0 to minimum 120 degree calicoes complete e all as specified and directed

Dismantling HT and LT (primary and secondary) terminal box covers and terminals, check / inspect the terminals, bushes, etc, arrest any leakage of oil by replacing gaskets tighten all terminal screws, bolts, nuts, etc, for proper contacts, refix covers, all as specified and directed for various types of transformers upto 300 KVA capacity.

All as per item but 300 KVA to 500 KVA

M&L for rewinding of primary coil 11 KV of transformer with super enamelled suitable gauge copper winding wire ,insulation sleeves , replacement of terminal, including Taking down transformer carefully from its position upto road not exceeding 50 Mtr by manually and transportation by vehicle (Recovery Van)/Manually to work shop and replacing with stand by transformer at the location all as specified and directed Capacity upto 250 KVA Note : - Rate deemed including removing and re- installation of necessary HT/LT cable/ACSR/Earthling connection from transformer including filteration of transformer oil.

M&L for rewinding of primary coil 11 KV of transformer with super enamelled suitable gauge copper winding wire ,insulation sleeves , replacement of terminal, including Taking down transformer carefully from its position upto road not exceeding 50 Mtr by manually and transportation by vehicle (Recovery Van)/Manually to work shop and replacing with stand by transformer at the location all as specified and directed Capacity upto 300 to 500 KVA Note : - Rate deemed including removing and re- installation of necessary HT/LT cable/ACSR/Earthling connection from transformer including filteration of transformer oil.

M&L for rewinding of secondary coil 0.433 KV of with super enamelled suitable gauge copper winding wire ,insulation sleeves , replacement of terminal, including Taking down transformer carefully from its position upto road not exceeding 50 Mtr by manually and transportation by vehicle (Recovery Van)/Manually to work shop and replacing with stand by transformer at the location all as specified and directed Capacity upto 250 KVA Note : - Rate deemed including removing and re- installation of necessary HT/LT cable/ACSR/Earthling connection from transformer, including filteration of transformer oil.

M&L for rewinding of secondary coil 0.433 KV of transformer with super enamelled suitable gauge copper winding wire ,insulation sleeves , replacement of terminal, including Taking down transformer carefully from its position upto road not exceeding 50 Mtr by manually and transportation by vehicle (Recovery Van)/Manually to work shop and replacing with stand by transformer at the location all as specified and directed Capacity upto 300 to 500 KVA Note : - Rate deemed including removing and re- installation of necessary HT/LT cable/ACSR/Earthling connection from transformer, including filteration of transformer oil.

Earthling complete with galvanised steel earth plate electrode 60 cm x 60 cm x 6.3 mm thick buried directly in ground earth pit not less than 2.25 m deep below normal ground level with the top edge of earth plate at a depth of not less than 1.5 m below normal ground level connected to GI earth strip 25X4 mm dia by means of bolts, nuts, check nuts and washers made out of GI and GI earth strip projected by 15 mm bore light grade GI pipe and connected to main control board all as shown in electrical plate No 5 of SSR Part I including necessary earth work and excavation in any type of soil and PCC 1 : 2 : 4 type B - 1 in chamber and 40 mm thick RCC 1 : 2 : 4 type B - 1 cover slab with 6 mm dia mild steel bars at 100 mm centre to centre both ways with 6 mm dia M S hooks complete all as specified.

Finding fault of HT Switch Gear HT XLPE UG Cable aluminium conductor armoured of cable size 95 Sqmm to 240 Sqmm upto and starting from switch gears by fault locater including taking out from trenches/poles/structure and relaying after fault rectification complete all as specified and directed. Note: Rate including hire of HT fault Locater and Earth Work. works should be completed with in 12 hrs, Jointing Kit will be measured and paid separately under relevant Item if required. Before Starting of any HT works contractor should ensure safety arrangements and proper shutdown of feeders/mains to avoide any unwanted incidents

Dismantling HT concrete poles/ struts, any size including pcc coping.

Supply and erect steel tubular swaged poles complete with MS base plate, finial taper plug, bolts, nuts & screws as specified type 410 SP- 55 (11 metres long) conforming to IS-2713 including applying two coats of aluminium paint over a coat of red oxide zinc chrome primer over the exposed surface and applying two coats of black bitumenous paint over the embeded portion of pole, erecting in truly vertical position including excavation in any strata and earth work complete all as specified and directed. Note :- PCC for foundation and coping will be measured & paid separately under relevant items of Sch 'A'.

M&L for Cement concrete Type D2 1:4:8 (40mm graded aggregate) in foundations, filling and mass concrete including form work.

M&L for Cement concrete Type D2 1:3:6 (20mm graded aggregate) for coping to the poles with finishes with out using extra cement

EVEREST ENGINEERING WORKS

PSK Enterprises