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 1.5mtr wide and not exceeding 1.5 mtr in depth and getting out in soft/loose soil complete all as specified and as directed.

Removing excavated material/surplus soil and depositing where directed at a distance not exceeding 50mtr and depositing at a level not exceeding 1.5 mtr from starting point all as specified and as directed.

Returning, filling in trenches, including spreading, levelling, watering and well ramming in layers not exceeding 25cm thick each layer in soft/loose soil all as specified and as directed.

Supply lay/spread in trenches, river sand, clean, including spreading, levelling, punning as in cushioning of cables all as specified and as directed. Note :- Punned depth will be measured and paid.

Supplying and laying reinforced precast concrete cable cover, class HV, type 2, Flat, size 300 mm x 180 mm x 40 mm complete laid in trenches as in cable protection all as specified and as directed

S&F cable jointing kit for 11 KV (earthed) grade cable straight through heat shirnkable type joint complete with jointing material and accessories suitable for HT UG XLPE cable armoured heavy duty cables with aluminium conductor connecting up and testing including taking down unserviceable joint for the following size complete all as specified and as directed.

3 core 50Sqmm to 95Sqmm

3 core 120Sqmm to 185Sqmm

3 core 240Sqmm to 400Sqmm

S&F cable end termination jointing, heat shrinkable type, outdoor type complete with all accessories and insulating compound etc., as per manufacturers instructions suitable for HT 11000 volts, XLPE UG cables of the following size , connection up and testing including taking down existing unserviceable termination joint complete all as specified and as directed.

3 core 50Sqmm to 95Sqmm

3 core 120Sqmm to 185Sqmm

3 core 240Sqmm to 300Sqmm

S&F cable end termination jointing, heat shrinkable type, indoor type complete with all accessories and insulating compound etc., as per manufacturers instructions suitable for HT 11000 volts, XLPE UG cables of the following size , connection up and testing including taking down existing unserviceable termination joint complete all as specified and as directed.

3 core 120Sqmm to 185Sqmm

Supply and laying in trenches/poles/wall etc HT UG Cable FRLS XLPE insulated screened, PVC bedded, galvanised steel strip, multi stranded, armoured electric power cables (Heavy duty earthed) with aluminium conductor 11000 volts grade conforming to IS specifications including taking down the existing unserviceable cable complete all as specified and directed :- Note :- (i) Lugs and glands are deemed to be included in the rate quoted for laying of cable and to be used properly wherever required while connecting cables to the panel board. (ii) Earth work such as excavation, refilling, etc. shall be measured separately under relevant items.

3 core 95 Sqmm

3 core 120 Sqmm

3 core 185 Sqmm

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 insulators of rating upto 200 Amps 11 KV including taking down existing unserviceable switch complete all as specified and as directed.

Supply and laying GI tubing of 80mm dia galvanised light grade of any length including all fittings such as bend, elbow, tee and union on floors/walls/ceilings complete all as specified and as directed. .

Supply and laying GI tubing of 100mm dia galvanised light grade of any length including all fittings such as bend, elbow, tee and union on floors/walls/ceilings complete all as specified and as directed. .

S&F insulator HT 11000 volts grade, PIN type of size 150mm height and 150mm dia, porcelain, vitreous, white or brown including galvanised mild steel spindle two galvanised iron washers and one galvanised iron nut including taking down existing unserviceable insulator complete all as specified and as directed.

S&F HT 11000 volts grade, DISC type insulator single disc assembly of size 145mm height and 255mm dia ball and socket type, porcelain, vitreous, white , brown or green single disc assembly for tension with tensile clamps for conductors including taking down existing unserviceable insulators complete all as specified and as directed.

S&F loop type insulator large size, vitreous porcelain white or brown with overall dimensions 90X140mm, clearance of hole 25.5mm including taking down existing unserviceable insulator complete all as specified and as 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 .

S&F 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 and inclusive of applying two coats of aluminium paint over a coat of primer including taking down existing corroded steel sections complete all as specified and as directed.

Taking down, servicing and overhauling of HT, 11KV GOD carrying out complete servicing and cleaning with clean cloth & cleaning agent, lubrication of the mechanism & greasing with petroleum gel, tightening of all parts and checking the complete GOD for proper functioning complete all as directed by the Engineer-in-charge. Note :- Unit rate quoted is deemed to be inclusive of renewal of all defective parts and nothing extra will be admissible.

Labour charges for restraining of ACSR conductor from pole to pole with minimum sag as per HT/ LT specification all as specified and as directed. Note :- Unit rate quoted is deemed to be inclusive of lubricants and tools and nothing extra will be admissible.

S&F HT 11 KV Phase seperator suitable for fixing OH ACSR conductor complete all as specified and as directed.

S&F tinned copper(TC) HT fuse wire 120Amps complete all as specified and as directed.

S&F tinned copper(TC) HT fuse wire 60Amps complete all as specified and as directed.

S&F tinned copper(TC) HT fuse wire 40Amps complete all as specified and as directed.

S&F tinned copper(TC) HT fuse wire 20Amps complete all as specified and as directed.

S&F lightning arrester, expulsion type complete with all fitting transmission class, discharge capacity 65 Kilo Amps suitable for 11000 Volts rating, ISI marked including taking down existing unserviceable lightning arrester complete all as specified and as directed.

S & F Expulsion type drop out fuse with all accessories and contact insulator etc fixed on HT pole for the following rating suitable for 11 KV 3 pole with two Nos insulator per pole including dismantling existing unserviceable one complete all as specified and as directed.

rating above 10 and upto 25 Amps

rating above 25 and upto 50 Amps

rating above 50 and upto 100 Amps

S & F HT load break switch fuse rating of 40Amps Type C-1, 11KV suitable for existing LBS including dismantling existing unserviceable one complete all as specified and as directed.

All as per Item No 26 here in before but 50Amps

All as per Item No 26 here in before but 63Amps

M&L for rubber mat suitable for 11000 volts grade HT installation of size 2mtr x 1mtr x 19mm thick complete all as specified and as directed. Make : Jyoti/Denson or equivalent.

Taking down, servicing and overhauling of Vacuum circuit breaker (VCB/LBS) Amps : 400A/630A/800A , HT, 11KV VCB/ LBS/OCB 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 :- Unit rate quoted is deemed to be inclusive of spares required/ lubricants and tools and renewal of all defective parts and nothing extra will be admissible.

Supply ,fixing and renewal of following items of 400 to 800 Ampere, 11 KV, 3 phase, 50 Hz, HT VCB/ LBS/ OCB of any type or make or all as per existing by removing VCB from 11KV Panels after disconnecting the connections complete all as specified and as directed.

Bearings as per existing size

charging rod

Rocker Lever

charging bush

Power pack 110AC/110V DC all as specified and as directed Make: Sun Electric or Equivalent

Bus support Insulator for LBS/VCB/OCB 11KV grade, with suitable tensile strength all as existing shape and size suitable for existing systems all as specified and as directed

Tripping coil as per existing capacity and make

closing coil as per existing capacity and make

Spring Changing Handle assembly as per existing capacity and make

Raising and Lowering gear operated Handle

Spout bushing as per existing size and model/make

Repairing and setting of on and off tripping mechanism system together with adjustment of main shaft with replacement of minor items such as Bush pin Washer Nuts & Bolts spring and wiring etc , Cleaning and washing of 400 to 800 Ampere, 11 KV, 3 phase, 50 Hz, HT VCB of any type or makecomplete all as specified and as directed.

Complete servicing, overhauling, repairing, cleaning, oiling with setting of tripping mechanism of Air Circuit Breakers (ACBs) 415 Volts of capacity 630Amps to 1000Amps 50HZ any type or make or all as per existing make including submission of service & test reports complete all as specified and as directed. The scope of work includes the following : 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 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. ix) Checking presence of all circlips x) Checking condition and alignment of jaw contact with cradle terminals 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 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 No 1 : The servicing to be done by authorised service provider of manufacturer. Note No 2 : Unit rate quoted is deemed to be inclusive of minimum spares/ lubricants and tools and renewal of all defective parts and nothing extra will be admissible.

Supply and fixing by renewing of following items of Air Circuit Breaker (ACB) 415 volts 630 to 1000 Amps 50Hz,any type or make or all as per existing make complete all as specified and as directed.

Closing relay

Terminal Adaptors (4 terminals per Phase)

Relay module

Shunt trip release

Auxiliary switch

Arc chutes

Trip bush buttons

ACB Position Indicator

M&L for preparation of old painted surfaces, removing dust and other deposited materials by scraping from HT/LT tubular pole 11mtr 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, street light bracket with one coat of aluminium paint complete all as specified and as directed.

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

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

Filtration of transformer oil of transformers step down 11 KV/ 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 all as specified and as directed. Note : Transformer oil test kit and filtration machine shall be provided by the contractor at site.

Removing silica gel from the breather assembly of transformers of capacity upto 500 KVA installed at different sub stations and providing fresh silica gel in the breather complete all as specified and as directed.

Supply and filling/topping up new transformer oil conforming to IS specification for transformer upto 500 KVA capacity of suitable insulation grade not less than 50KV installed at various sub stations complete all as specified and as directed.

Dismantling and removing the following unserviceable parts/items from the transformer of various capacity including supply and fixing new parts/items complete all as specified and as directed.

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 renewal of breather assembly of any size , as per existing shape suitable for existing transformer complete all as specified and directed

M & L for renewal of transformer temperature gauge dial type having temp range 0 to minimum 120 degree celsius complete 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 providing new gaskets tightening all terminal screws, bolts, nuts, etc, for proper contacts, refix covers for various types of transformers upto 300 KVA capacity complete all as specified and as directed.

All as per Item 45 here in before but 300KVA to 500KVA

M&L for rewinding of primary coil 11 KV of transformer of capacity upto 250 KVA with super enamelled suitable gauge copper winding wire ,insulation sleeves , renewal 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 ( Note : - The quoted rate shall be deemed to include removing and re- installation of necessary HT/LT cable/ACSR/Earthing connection from transformer )

All as per Item 47 here in before but of capacity 300KVA to 500KVA

M&L for rewinding of secondary coil 0.433 KV of transformer of capacity upto 250 KVA with super enamelled suitable gauge copper winding wire ,insulation sleeves , renewal 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 ( Note : - The quoted rate shall be deemed to include removing and re- installation of necessary HT/LT cable/ACSR/Earthing connection from transformer )

All as per Item 49 here in before but of capacity 300KVA to 500KVA

M&L electrical earthing complete with GI plate electrode of size 60cm x 60cm x 6.3mm thick buried directly in ground vertically at a depth not less than 2.25 mtr below normal ground level, with top edge of earth plate at a depth not less than 1.5 mtr below normal ground level, connected to GI earth strip 25X4mm dia by means of bolts, nuts and washers of galvanised iron, earth lead wire protected by means of 15mm bore light grade GI pipe upto switch board / panel board, all as specified and as shown in MES schedule electrical plate No 3 of SSR Part I, including excavation and earth work in any type of soil, PCC 1:2:4 type B1 in chamber, RCC 1:2:4 type B1, 40mm thick cover slab with 6mm dia MS bars at 100mm centre both ways, with 6mm dia MS hook, charcoal dust, salt, funnel for watering complete all as specified and as directed.

Finding out existing defective HT Switch Gear (VCB/LBS/GOD) or HT XLPE UG Cable aluminium conductor armoured of cable size 95 Sqmm to 240 Sqmm by fault locater including taking out from trenches/poles/structure and relaying after fault rectification complete all as specified and directed. Note: The quoted rate shall be deemed to include hire of HT fault Locater and Earth Work. The work should be completed within 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 avoid any unwanted incidents.

LAKSHMI ELECTRICAL ENTERPRISES