REPAIR SERVICING OF HT VCBS CALIBRATION OF RELAYS UNDER AGE EM II IN GE CENTRAL KIRKEE

Amount

M&L for taking down the HT vacuum circuit breaker of capacity 630/800A, 22 KV, 350 MVA for servicing, repairs, replacement of defective/worn out components and reassembling complete comprising of the following including testing and commissioning to the entire satisfaction of Engineer-in-Charge complete all as specified and as directed. Make of HTCBs :- Powercare Electrical , ABB

Dismantling the HTCB from the enclosure consisting of vacuum interrupter assembly, socket contacts , checking the serviceability of the parts carefully including cleaning, adjustments, replacement of defective/worn out parts and re-assembling the unit complete.

Cleaning the external surface of bushings with CTC or Liquid ammonia to remove the accumulation of dirt or any other deposits. Inspection of bushings and make sure that vibration due to breaker operation have not caused the bushings to move resulting misalignment of contacts.

Checking the vacuum interrupter assembly and contacts. Checking the alignment of contacts and setting the contact surfaces to bare firm and uniform pressure and adjust the gap as per manufacturer's instructions within tolerance. Badly pitted contacts needs to be replaced. Note: Contacts shall be measured and paid separately under respective item.

Checking the breaker bushing of bus bar and circuit side inspecting the internal surface carefully for any change/cracks, replacement of bushings etc. complete.

Dismantling the spring charging mechanism of the HTCB, checking the operations of the closing/tripping through closing/tripping coils electrically as well as manually charging including cleaning adjustments and replacement of defective /worn out parts re-assembling complete for the following.

Checking the condition of the spring charging motor along with gear box including servicing to the motor commutator bushes, lubrication of bearing surfaces etc. complete.

Checking the ratchet wheel assembly, driving and charging parts including replacement of defective ratchet wheel and parts.

Checking the type and release prop and dash pot assembly making necessary adjustment including replacement of defective/worn out components complete.

Checking the operating mechanism of the breaker and ensure its operation freely through entire stroke. Parts which shows excessive wear and tear to be replaced or adjusted as per manufacturer's instructions within tolerance.

Checking of operating voltage at mechanism terminals and tripping arrangement for positive tripping. Contacts to be examined for their condition and operation. Dress the pitted contactcts and replace if necessary.

Review the adjustment of all pressure switches and lockout devices.

Inspecting all bolts, nuts, pins and collar pins are in place and they are tight and opening properly.

Inspection, cleaning and re-lubrication of circuit breaker.

M&L for taking down the HT vacuum circuit breaker of capacity 1250 Amps, 22 KV, 350 MVA for servicing, repairs, replacement of defective/worn out components and reassembling complete comprising of the following including testing and commissioning to the entire satisfaction of Engineer-in-Charge complete all as specified and as directed. Make of HTCBs :- Powercare Electrical , ABB

Dismantling the HTCB from the enclosure consisting of vacuum interrupter assembly, socket contacts , checking the serviceability of the parts carefully including cleaning, adjustments, replacement of defective/worn out parts and re-assembling the unit complete.

Cleaning the external surface of bushings with CTC or Liquid ammonia to remove the accumulation of dirt or any other deposits. Inspection of bushings and make sure that vibration due to breaker operation have not caused the bushings to move resulting misalignment of contacts.

Checking the vacuum interrupter assembly and contacts. Checking the alignment of contacts and setting the contact surfaces to bare firm and uniform pressure and adjust the gap as per manufacturer's instructions within tolerance. Badly pitted contacts needs to be replaced. Note: Contacts shall be measured and paid separately against respective item.

Checking the breaker bushing of bus bar and circuit side inspecting the internal surface carefully for any change/cracks, replacement of bushings etc. complete.

Dismantling the spring charging mechanism of the HTCB, checking the operations of the closing/tripping through closing/tripping coils electrically as well as manually charging including cleaning adjustments and replacement of defective /worn out parts re-assembling complete for the following.

Checking the condition of the spring charging motor along with gear box including servicing to the motor commutator bushes, lubrication of bearing surfaces etc. complete.

Checking the ratchet wheel assembly, driving and charging parts including replacement of defective ratchet wheel and parts.

Checking the type and release prop and dash pot assembly making necessary adjustment including replacement of defective/worn out components complete.

Checking the operating mechanism of the breaker and ensure its operation freely through entire stroke. Parts which shows excessive wear and tear to be replaced or adjusted as per manufacturer's instructions within tolerance.

Checking of operating voltage at mechanism terminals and tripping arrangement for positive tripping. Contacts to be examined for their condition and operation. Dress the pitted contacts and replace if necessary.

Review the adjustment of all pressure switches and lockout devices.

Inspecting all bolts, nuts, pins and collar pins are in place and they are tight and opening properly.

Inspection, cleaning and re-lubrication of circuit breaker.

M&L for taking down the HT oil circuit breaker of capacity 800/400A.22 KV, 350 MVA for servicing , repairs, replacement of defective/worn out components and reassembling complete comprising of the following including testing and commissioning to the entire satisfaction of Engineer-in-Charge complete all as specified and as directed. Make : Kirloskar Electric

Dismantling the HTCB by separating the upper chamber consisting of contacts and cross bar assembly from the oil tank, checking the serviceability of the parts carefully including cleaning, adjustment, replacement of defective/worn out parts (excluding parts) re-assembling the unit complete:-

Drain out the oil from the tank, cleaning the tank by removing the sediments at the bottom, checking the condition of the tank liners and gaskets including replacement of defective gasket/tank liners. Testing of oil, if shows signs of moisture, carbonisation or dirt filtering and testing and replacement if necessary. Ensuring the oil gauge indicating properly the actual oil level. Checking the condition of all gaskets to ensure that they are sealed properly and arrest any leakages by replacing the gaskets or sealing the box outside and inside with necessary sealing material etc. complete.

Checking the operating mechanism of the breaker including cleaning, lubrication to all moving parts of the breaker mechanism like hold on catch assembly, trip bridge, trip lever and assembly, charging motor, belt, latchgear and worm gear assembly clutch shaft etc for proper operation both electrically and manually. Checking the operating mechanism of the breaker and ensure its operation freely through entire stroke. Parts which shows excessive wear and tear to be replaced or adjusted as per manufacturer's instructions within tolerance.

Checking of operating voltage at mechanism terminals and tripping arrangement for positive tripping. Contacts to be examined for their condition and operation. Dress the pitted contacts and replace if necessary.

Checking the raise / lower mechanism in three position (Draw out, test, service) and lubrication to the moving parts.

Review the adjustment of all pressure switches and lockout devices.

Inspecting all bolts, nuts, pins and collar pins are in place and they are tight and opened properly.

Inspection, cleaning and re-lubrication of circuit breaker

Checking the auxiliary contact assembly, cleaning/replacement of contacts, adjustment of operating lever and lubrication to moving parts and apply petroleum jelly to the contacts.

NOTES for item No 1 to 3:- Cost of additional hardware like bolts, nuts , washers, spring washers, petroleum jelly or any other item not included in the list of supply only spare parts etc, to put the breaker in serviceable condition is deemed to be included in the rate quoted . (ii) The major spare parts required to be replaced are measured and paid for separatly. (iii) Old unserviceable spare parts removed from the breakers shall be accounted for under schedule of credit

Supply of following material for 630/800/1250A VCBs of power care /ABB make complete all as specified and as directed.

Isolating Contact Finger Type-2 Pair 800A

Isolating Contact Flat Type-630 800A

Top Guide Roller

Interlock Handle

Closing Coil 24V

Closing Coil 110V

Shunt Trip Coil 24V

Shunt Trip Coil 110V

Closing Coil Box Assembly w/o coil

Trip Coil Box Assembly w/o coil

Release prop

Pin for Release prop

Trip Prop

Trip Roller

Release Roller

Motor Cut off Switch 2NO+2NC

Motor Cut off Switch lever

Buffer for opening spring

Buffer for closing spring

48 pin plug and socket wit wiring complete with interlock assy

Space heater

Thermostat for strip heater

Auxiliary Housing Assembly Male

Auxiliary Housing Assembly female

Emergency Trip handles

Rachet wheel assembly

Dust proof covers for bushings

Shutters

Shutters operating Levers

Aux Relay VAA 33, 110V DC 8NO & 8 NC

Epoxy circuit spout insulator

Breaker Control switch

on -off /tripping mechanism with necessary parts

Male & Female contacts with necessary parts to connect breaker with bus bars

Motor cut off limit switch

Supply of following material for VCBs 1250 Amps capacity. complete all as specified and as directed.

Isolating Contact Finger Type-3 Pair 1250A

Isolating Contact Flat Type-1250A

Supply of following material for 800 Amps capacity MOCBs complete all as specified and as directed. Make: Kirloskar

Fixed arcing contacts.

Main fixed contacts with springs

Set of 3 laminations with clamps.

Main moving contacts inluding tension plates.

Insulating arms for contacts

Oil seals for oil breaker

Contact block including collar lifting cross bar assembly

Terminal Bushing Assembly complete with spindle 400A/800A

48 pin plug and socket with wiring complete

Auxiliary Housing Assembly Male

Auxiliary Housing Assembly female

Emergency Trip handles

Shunt trip Coil

Closing Coil

Rachet wheel assembly

Dust proof covers for bushings

Shutters

Shutters operating Levers

Aux Relay VAA 33, 110V DC 8NO & 8 NC

Epoxy circuit spout insulator

Breaker Control switch (Trip ,Neutral ,Close ) with NO + NCs

on -off /tripping mechanism with necessary parts

Male & Female contacts with necessary parts to connect breaker with bus bars

fuse carrier of oil breaker

M&L for Breaker/ transformer oil duly filtered ,dehydrated with minimum 60 KV di-electric strength.

M&L for repair /reconditioning of breaker in out trolley comprising of proper alignment of wheels ,wheel moving channel/rail , ramp .repairing of stopper pins ,locking pins ,replacement of damaged wheel ,wheel fixing base etc complete for smooth operation of trolly for in/out and up/down etc complete all as specified and directed . NOTE :- Rate quoted for conditioning of trolley is deemed to be included for any welding , bending, straightening etc required for completion of job.

M&L decarbonising/cleaning complete HT panels board, 22 KV cubicle type, consists of bus bar chamber, circuit chamber and metering chambers, by opening the spout/bus covers inspecting the bus bar joints, cleaning of bus bars, checking the bus bar spouts and circuit spouts for any flash overs/tracks, applying Becktolred solution to the bus bars and spouts having moderate tracking, replacement of bus bar/circuit spouts in case of spouts subjects to heave tracking, applying HT insulated red compounds/Monoplast compound at the bus bar joints after tightening of joints, cleaning of bus bar insulators and bus bars with CTC and improving megger with inject to ensure proper decarbonisation and re-assembling complete including fixing of new bus bar supporting insulators if required to be replaced all as directed by Engineer-in-Charge. Note: Cost of new insulator shall be paid as supply only in respective item.

M&L Supply only HT bus bar supporting insulators as per existing size and shape suitable for 22 KV panel complete all as specified and directed .

M&L for dismantaling of unserviceable power pack unit and S&F new unit in replacement commissioning & testing of power pack rating 110 volt/230volt AC input 30 volt DC output for Auxiliary supply including necessary control wiring in existing HT panel complete all as specified and directed.

M&L for disconnecting and taking out the IDMT/numerical relay any type (1NO UV/OV + 1No earth fault / Over current + 1 No master trip relay) overhauling / repairing ,testing ,calibrating the relay by conducting primary injection and secondary injection tests, checking with current transformer, rectification of defects in control wiring for proper tripping of circuit brakers through CTs and relays and tripping coils. adjustment/setting to plug and time multiplier settings of the relay to achieve the discrimination in tripping time of upstream brakers,re-installation of the relay in circuit complete all as specified and as directed. NOTE:- 1:- IF replacement of any relay is required then fixing of new relays and necessary control wiring , testing, calibration, setting to load requirements etc., are deemed to be included in the rates quoted. The cost of New relay will be paid as supply only rates under respective item.

Taking down unserviceable electro mechanical relay and Supply, install, testing and commissioning of microprocessor based numerical relay with 3 independent over current , 3 independent earth fault with high set, housed in drawout type metal case for panel mounting with 0.1 to 10 In over current, 0.01 to 8 Ion/0.02 to 1 Ion/ 0.1 to 10 Ion earth current, instantaneous records, event record function etc., complete including necessary control wiring. Make: L&T model MC61AnX or equivalent in Micom Note for Item No 11 & 12: The Relays and meters to be fixed in existing Panel by suitable cutting fixing wiring connecting and complete testing etc. The rates quoted by the contractor are deemed to be inclusive of these misc. works.

S&F digital type multifunction meter VAF, PF 3 Phase 4 wire AC 440 Volts 50 Hz of rating 5 Amps with Class 1.0 with Provision for housing the meter & control wiring with 2.5 Sqmm PVC insulated unsheathed multistranded copper conductor including testing & Commissioning complete Make Schneider Cat No EM 6459 or equivalent of HPL make all as specified and as directed by the Engineer-in-Charge. Note: Any modification to panel or any enclosure for fixing MF meter is deemed to be included in the rates quoted and no extra payment will be admissible on this account.

M & L for repair / re-conditioning of HT CTs by removing of all dust cleaning of terminals improving of megger value with inject and Checking & testing the 22 kv CTs for its ratio and connecting with new nut bolts complete all as specified and as directed.

M&L for repair / reconditioning of HT PTs by removing of all dust cleaning of terminals improving of meager value with inject and connecting with new nut bolts complete all as specified and as directed.

M&L for removing of defective current transformer and S&F in old location 22 KV epoxy resin cast HT CT Ratio as per site requirement Dual core Class 5P 10 for protection, metering Class 1.0 as per existing size/shape suitable for optimum performance of relays complete all as specified and as directed. Make: Kappa/CG or equivalent

M&L for removing of defective potential transformer and S&F in old location 22 KV epoxy resin cast HT PT Ratio 22KV/110V Class 1.0 200 VA burden suitable for optimum perforemance of relays complete all as specified and as directed. Make: Kappa/CG or equivalent Note for Item No. 16 and 17: Modifications for fixing the Cts/PTs in existing panel are deemed to be included in the quoted rates of the item.

M&L for HT fuse for PT 22 KV, 3.5Amps to 10Amps, 25 KA breaking cap of rating as per existing for the particular HT panel as per existing shape and size tubular or box type complete with fuse holder all as specified and directed. Note: Existing fuses shall be checked at site and procurement shall be made as per existing sample.

M&L for disconnecting HT/LT XLPE cable of any size from structure/pole/transformer for finding fault, M&L for defect rectification HT/LT cable laid in trenches or any location by locating fault with the help of electronic fault locating machine comprising of surge generator pulse, ECHO fault locator with high frequency distance calculator etc. including and additional excavation in normal or any type of strata required for exposing the cable fault ; removal of deteriorated portion of cable treating of cable and keeping the same ready for jointing work for cable of any size. The fault locating equipments will be brought to site within the 6 hours of instruction from Engr-in-Charge as specified. Note Complaint will be notified to contractor on mobile phone at any time between 0800 hrs to 2200 hrs and will be rectified within 6 hours after notification, failing which Rs 500/- per day per complaint will be recovered

M&L in repairs HT heat shrinkable indoor type end termination cable jointing kit suitable for 22 KV 3 core 120Sqmm to 185Sqmm XLPE aluminium conductor cable including disconnecting of cable and removing of old jointing kit complete all as specified and directed .

M&L in repairs HT heat shrinkable strait through cable jointing kit suitable for 22 KV 3 core 120-/185 sqmm XLPE aluminium conductor cable including disconnecting of cable and removing of old jointing kit complete all as specified and directed .

M&L for rubber mating HT 22 KV rating 5 mm thick 1 mtr width complete all as specified and directed . Make: Jyoti or Equivalent as approved by GE.

M&L for preparation of steel surfaces of existing MOCB/SFS breaker cubical panel including cleaning/scrapping of old painted surface, removing all the scrapped of paint particles from the panel using the proper vacuum cleaner to the complete satisfaction of engr-in-charge applying two coats of synthetic enamel paint by using of spray machine to finish the surface glossy of colour /shade as approved by Eng-in-charge, commissioning of breaker after completing the job including marking of MES/SM No, incoming , outgoing to or from etc all as specified and directed . Note :-(a) The quoted rate is deemed to be inclusive of pasting details pertaining to respective breaker like - details of CT & PT connected, calibrated and set parameters of protection relay installed details of transformer fed by respective HV breaker, etc all as specified by Eng-in-charge on the inside of the panel door/wall covered with transparent sheet complete.

M&L for dismantling old unserviceable cable ducts from within the panel, S&F PVC cable ducts of size of size 45x30 MM including drawing existing cable through the ducts and commissioning the panel all as directed and specified by Engr-in-Charge. Make-L&T, Cat No. - WWA4530SG2 or equivalent as approved by GE.

S&F in repairs 2.5 Sqmm multi stranded copper FR wire for control circuit complete in various HT panels all as specified and directed by Engr-in-Charge.

M&L for earthing complete with copper earth plate electrode 60×60cm×6mm thick electrode burried directly in ground (earth pit not less than 2.25 m deep below GL) with top edge of the plate not less than 1.5 m below the normal ground level connected with 20×3mm copper strip as earthing lead by means of bolts, nuts, check nuts and washers of galvanised iron or steel including necessary excavation & earth work in any type of soil, removing surplus soil to a distance not exc 50m, with and including PCC chamber in PCC (1:2:4), type B1, using 20 mm graded stone aggregate, mild steel frame made out of angle iron of size 40mm x 40mm x 6 mm thick duly painted with two coats of synthetic enamel paint over one coat of red oxide zinc chrome primer hinged with and including 6 mm thick Cl cover with handle, watering arrangement with funnel internally secured with wire mesh with 20 mm dia medium grade GI pipe for watering, 40 mm dia light grade Gl pipe for lead protection in and including alternate layer of charcoal dust and common salt complete all as shown in electrical plate No 3 of SSR Part-I (2009) connected to earthing test point all as specified and indicated including testing on completion including retrieving of old GI earth plate, CI cover, GI pipes, angle iron frame from existing earthing as directed by Engineer-in-Charge. NOTE : - (i). Earthing strip GI/copper upto 7.5m will be measured and paid under this item only. (ii). The earth chamber shall be constructed 50 cm away from the edge of earth pit and the cost of the same is deemed to be included in the rate quoted for above item. (ii). Quoted rate is deemed to be inclusive of cost of demolition of old earthing as directed by Engr-in-Charge. (iii). The new earthing so constructed must have resistance value below 2 ohms. If the aforesaid resistance value is not achieved contractor has to make proper additions/alterations to the newly constructed earthing at his own cost.

M&L Copper earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. of size 20x3mm complete all as specified and as directed.

Supply and laying in replacement, in trenches /ducts/fixing on pole/STR with suitable size of GI clamps made out of GI strip 32 mm x 6 mm, XLPE insulated, screened, earthed, PVC bedded, galvanised steel strip, electric power cable (heavy duty) of size 3 core x 120 sqmm with aluminium conductor suitable for 22 KV (E) grade as per relevant IS including latest amendment for IS testing, commissioning along with S&F for HT cable route indicator for every 100 m with and including suitable size PCC (1:3:6) type C1 Foundation complete all as specified and directed including taking out of old burnt out cable alongwith cable covers complete all as specified and as directed. Note:- (a) Earth work, EHV cable cover, sand cushioning & GI pipe will be measured and paid seperately. (b) High voltage test to be conducted at site with suitable voltage before and after laying of HT cable and reading shall be recorded jointly and test report to be submitted in triplicate to the Engineer-in-Charge. The cost of the same shall be deemed to be included in the unit rate quoted for the item.

M&L for Boring of holes under road, pavement, hard standing by trenchless technology using ultra sound technique and necessary machine including HDPE pipe of 100 mm dia suitable for 0.4 mpa working pressure complete all as specified and as directed.

Excavation in trenches for not exc 1.5 mtr wide and not exc 1.5 mtr depth, not exc. 10 sqm on plan and getting out in soft/loose soil including taking out faulty cable/cable, cable covers and GI pipe complete all as specified and directed.

M&L for spreading, filling in crushed stone dust for cushioning to underground HT cable complete all as specifiedand and as directed.

M&L for removing excavated materials n.exc 50m and depositting where directed at a level n.exc 1.5m above the Starting point.

M&L for returning filling in including spreading leveling watering and well ramming in layers n.exc 25cm complete all as specified & directed.

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

M&L cross arms, bracing, supports, clamps and back plates MS sheet fabricated from structrual steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts in any shape or size for repair to panels as indicted and inclusive of one primer coat one under coat and two finishing coat of aluminium /oil paint.

M&L for replacement of panel locks with panel key suitable for old panels as required at site complete all as specified and as directed.

M&L for repair to battery charger suitable for charging of battery bank 50 amps 110 volt DC output and 230 Volt AC input complete all as specified and as directed.

S&F single core copper conductor PVC insulated unsheathed flexible stranded cable 50 Sqmm as in jumper connections and the like complete all as specified and as directed.

M&L for replacement of lead acid batterry 2 volt 200 AH make Exide model TV 200H mark 1 as per old model or equivalent latest model complete all as specified and as directed. Make: EXIDE / TATA / AMCO

M&L for replacement of battery inter connecting lead / strip with terminal and nut bolt made from lead metal as per sample for connecting of batterries in series complete all as specified and as directed.

M&L for checking of DC circuit complete from battery bank to HT panels for proper supply to HT panel cotrols for smooth functioning of panels complete all as specified and directed.

M/S. Niksun Electro-Infra Private Limited