REPAIR/MAINTENANCE OF HT EQUIPMENT, CABLES, APFC PANELS, RELAYS AND METERING CONTROLS AT VARIOUS SUB STATIONS OF OTM AND TECHNICAL BUILDINGS AND REPAIR OF TRANSFORMERS INCLUDING DEHYDRATION AT INS ANGRE, INS TRATA INS KUNJALI UNDER GE (NW) KUNJALI

Amount

Note : The equipment offered shall be complete in all respects. Any material and components not specifically stated in this specification but which is necessary for trouble free operation of the equipment and accessories specified in this specification, shall be deemed to be included unless specifically excluded. The equipment shall conform in all respects to high standards of engineering design and workmanship and shall be capable of performing in continuous operation.

Note : The equipment offered shall be complete in all respects. Any material and components not specifically stated in this specification but which is necessary for trouble free operation of the equipment and accessories specified in this specification, shall be deemed to be included unless specifically excluded. The equipment shall conform in all respects to high standards of engineering design and workmanship and shall be capable of performing in continuous operation.

M&L for disconnecting all HT electrical connections from HT vacuum circuit breaker of capacity from 400-800 Amps, 11 KV, for servicing,necessary repairs and re-assembling complete comprising of the following including testing and commissioning all as directed by Engineer-in-Charge. (a) Dismantling the VCB from the enclosure consisting of vacuum interrupter assembly, socket contacts, checking the serviceability of all parts, cleaning, alignment of closing/opening mechanisms and re-assembling the unit complete. (b) Cleaning the external/internal surface of bushings with CTC/ Tri-chloro-ethylene to remove the accumulation of carbon or any other deposits. (c) Checking the vacuum interrupter assembly and contacts and ensure the alignment of contacts. (d) Checking the condition of the spring charging motor along with gear box, checking the operations of the closing/tripping coil including servicing to the motor, lubrication of bearing surfaces etc. (e) Checking the ratchet wheel assembly, driving and charging parts and adjust. (f) Inspecting all bolts, nuts, pins and ensure collar pins are in place and they are tight and opened properly. g) Applying petrolium jelly to moving contact arms and Doctor beck solution to insulated parts moving arms of breaker and reassembling the unit Note:-Cost of additional hardware like, bolts, nuts , washers and spring washers, petrolium jelly ctc, to put the breaker in serviceable condition is deemed to be included in the rates quoted.

M&L for caliberation of relay of any type and make by conducting primary injection test to HT 11 KV VCB/OCB panel with connected auxilary relays by injecting current (as per primary ratio of CT) through CT bus bar terminals and protective relays/ tripping coils completely including rectifiation of defects in control wiring if any for proper tripping of circuit braker to achieve the discrimination in tripping time of upstream brakers and as per actual loads complete including submission of test report with recommendation complete all as specified and as directed.

Note for Item No 4 :- The Caliberation of VCB's/OCB's to be carried out by authorised technician of OEM as approved by GE. The contractor shall provide necessary testing kits, testisng equipments,tools etc and shall also prepare the detailed test reports panel wise duly bounded and submit to the department. Rate for the kits and equipment is deemed to beincluded in rate quoted. Testing and turning shall be carried out in the presence of Engineer-in-Charge to the satisfaction of department failing payment for the above item will not be made to the contractor. No claim from the contractor be enterained on this account.

Supply and fixing in replacement following spares for 11 Kv VCB (400 Amp-800 Amp) during servicing/overhauling as per existing type and make to make VCB serviceable complete all as specified and directed .

ISOLATING CONTACT - FLAT TYPE

VACUMM INTERRUPTER up to 650 Amps capacity

VACUMM INTERRUPTER up to capacity 800 Amps

Closing Coil

Trip Coil

Spring Charging Motor

Digital relay for existing CT ratio as per existing Model/ make on VCBs

Multifunction meters of VCB as per existing make

Amp meter digital/ analog type for 6.6/11 KV VCB panel of existing make complete all as specified and directed.

Volt meter digital/ analog type for 6.6/11 KV VCB panel of existing make complete all as specified and directed.

VCB Operating Mechanism (Mention Coil & Motor voltage) 650 to 800 Amp VCB

VCB Operating Mechanism (Mention Coil & Motor voltage) 400 to 650 Amp VCB

Breaker Auxiliary Switch

Motor Cut-off Switch

Ratchet Wheel

Pin For Ratchet

Closing Coil Box Assembly

Trip Coil Box Assembly

Motor Cut Off Lever Assy

Charging Pawl

Buffer For Spring

Over Ride Stop

Over Ride Stop Pin

24 Pin Plug & Socket Assembly

Rack -In /Rack -Out Handle

Spring Charging Handle

Limit Switch Assembly

MI com digital relay as per existing Model/ make on VCBs

S&F in replacement current transformer from ring type HT cast resin wound type CT Ratio 40-25A/5+5A Dual core Class 5P 10 for protection, metering Class 1.0 , Burden 15VA, complete including fixing, testing and commissioning all as specified and as directed

S&F in replacement potential transformer resin cast, drawout type from Bus PT truck with the following specifations i) System voltage- 11 KV 3phase 3 limb ii) ILV-12KV, 50Hz iii) Ratio- 11KV/110V, star/star iv)Burden - 100VA/1 v)Voltage factor-1.2 continuous, 1.5/30sec as per IS

M & L for calibration testing and commissioning Master relay (Digital type) of 6.6/11 KV VCBs suitable to existing make/model including the hire charges of testing kit and tools as required on site complete all as specified and directed.

M & L for calibration testing and commissioning voltage relay (Digital type) of 6.6/11 KV VCBs suitable to existing make/model including the hire charges of testing kit and tools as required on site complete all as specified and directed.

M&L for disconnecting all HT connection from HT Oil circuit breaker of any existing make, capacity from 400-800 Amps, 6.6/11 KV, for servicing and carrying out necessary repairs mentioned here as under and re-assembling after repair complete comprising of the following including testing and commissioning all as directed by Engineer-in-Charge. (a) Dismantling the OCB from the enclosure consisting of vacuum interrupter assembly, socket contacts, checking the serviceability of all parts, cleaning, alignment of closing/opening mechanisms and re-assembling the unit complete. (b) Cleaning the external surface of bushings with CTC/ Tri-chloro-ethylene to remove the accumulation of carbon or any other deposits. (c) Checking the oil interrupter assembly and contacts and replace wherever necessary including ensure the alignment of contacts. (d) Checking the condition of the spring charging motor along with gear box, checking the operations of the closing/tripping coil including servicing to the motor, lubrication of bearing surfaces etc. (e) Checking the ratchet wheel assembly, driving and charging parts and adjust. (f) Inspecting all bolts, nuts, pins and ensure collar pins are in place and they are tight and opened properly. (f) Caliberation of OCB by conducting primary injection method test though skilled manpower. Note : Cost of spares required to make OCB functional is deemed to be included in the quoted rate by the contractor.

Material and labour for attending complaint of HT 6.6/11 KV electric power supply failure immediately through skilled electrician having minimum 5 years of experience in the field of HT Electric Supply respectively incl checking HT Breakers, detecting location of fault, rectification of problem, testing and restoration of power supply complete all as specified and directed by Engineer-in-Charge. Note : The cost of minor spares such as lugs, nut, bolts, washer, fuses, electric wire, T&P required to attend the complaints deemed to be included in quoted rate by the contractor. 2. Detecting of HT/LT fault and its rectification after informing complaint by concerned JE E/M or Engr-in-Charge within 3 hours. In case of failure noticed more than 3 hrs recovery shall be effected @ Rs.500/- per hour beyond 3 hrs.

Supplying , laying, Jointing testing and commissioning of HT UG cable, XLPE insulated, screened insulated,armoured and PVC bedded, 11000 volts grade (heavy duty) suitable for earthed system with aluminium conductor of size 3 core 240 sq.mm conforming to IS-7098 Part II laid in trenches, fixed to walls or passing through pipes and connecting up including taking out unserviceable cable complete all as specified and directed.

All as per item No 10.00 above but of size 120 sqmm 3 core

All as per item No 10.00 above but of size 185 sqmm 3 core

M & L cable End Termination Box, HEAT shrinkable, Indoor type suitable for 6.6-11KV, 50 to 95 sq.mm XLPE, 3 core power cable with aluminium conductor including dismantling old cable end termination of any description comp. all as specified.

M & L cable End Termination Box, HEAT shrinkable, Indoor type suitable for 6.6-11KV, 120 to 185 sq.mm XLPE, 3 core power cable with aluminium conductor including dismantling old cable end termination of any description comp. all as specified.

M & L cable End Termination Box, HEAT shrinkable, outdoor type suitable for 6.6-11KV, 50 to 95 sq.mm XLPE, 3 core power cable with aluminium conductor including dismantling old cable end termination of any description comp. all as specified.

M & L cable End Termination Box, HEAT shrinkable, Outdoor type suitable for 6.6-11KV, 120 to 185 sq.mm XLPE, 3 core power cable with aluminium conductor including dismantling old cable end termination of any description comp. all as specified.

M & L straight through joint , HEAT shrinkable, Outdoor type suitable for 6.6-11KV, 50 to 95 sq.mm XLPE, 3 core power cable with aluminium conductor including dismantling old cable end termination of any description comp. all as specified.

M & L straight through joint , HEAT shrinkable, Outdoor type suitable for 6.6-11KV, 120 to 185 sq.mm XLPE, 3 core power cable with aluminium conductor including dismantling old cable end termination of any description comp. all as specified.

M & L straight through joint , HEAT shrinkable, Outdoor type suitable for 6.6-11KV, 240 to 400 sq.mm XLPE, 3 core power cable with aluminium conductor including dismantling old cable end termination of any description comp. all as specified.

Material and labour for dismantling HT cable connection of existing size from the VCB/Transformer or any other location, checking the continuity of the HT Cable with the help of HT Merger and detecting fault manually or with the help of HT fault locating machine, site clearance and excavation in any kind of soil strata or through any type of road manually or with the help of JCB for the clearance of HT Cable fault and fixing of HT joints incl testing in presence of JE/Engr-in-Charge, spreading of river sand over the straight through joint and fixing of HT Cable cover, refilling and make good as per existing complete all as specified and directed by Engineer-in-Charge. Note : 1. Cost of hiring HT Fault finding machine, HT Megger, JCB for excavation and material required for the making good as per existing is included in the quoted rate by the contractor. 2. The HT cable joints, HT cable, sand and protection cover shall be measured and paid separately under respective items of the schedule. 3. Detecting of HT fault and its rectification incl fixing HT Cable joint after informing complaint by concerned JE E/M or Engr-in-Charge within 12 hours. In case of failure noticed more than 12 hrs recovery shall be effected @ Rs.1000/- per hour beyond 12 hrs.

M & L for (i) Disconnecting the HT/LT side and earthing connections of the transformer, (ii) Lifting transformer with the help of crane, loading on suitable vech to transport it to the workshop at and Unloading at workshop for servicing (iii) Dismantling of HV/LV bushing, opening of top cover, disconnecting of connections of tap changer of transformer (iv) Draining out the complete transformer oil (v) Lifting up the core and winding assembly (vi)washing and cleaning the core, rewinding of all burnout, damaged coils of core and phase , transformer tank and radiator fins with help of pressurised transformer oil for removal of sludge and sludge deposit so as to make them free from dust, dirt and sludge deposit (vi)Heating and ovening of core and winding assembly complete in vaccuum chamber for 72 hours so as to remove any moisture content in the core/winding and attaining requisite IR value, (vii) Retanking of complete core & winding assembly & fixing tap changer after servicing and testing, (viii) Refixing HV/LV bushing and making all internal connections, (ix)Providing new gasket packing minimum 12mm thick, including nut bolt washer complete, (x) Transporting transformer back to the site , Lifting it down with the help of crane and reconnecting the HT/LT cable and earthing connections complete all as directed and of followings capacities:

500 to 630 KVa, 6.6-11KV/433V

631 to 1000kVA, 6.6-11KV/433V

Note for item no 21.00 :- (i) In case of damage during tpt/ loading/unloading at any stage after recipt of transformer from Dept, the contracor shall be repsonsible for damage and it shall be made good by him at his own expense.the decision of Engineer in charge in the regards shall be fixed & biding. (ii) Transformer oil required for filling shall be measured and paid seperately (iii) All other spares required shall be measured and paid sperately (iv) Rates are inclusive of testing of earthing before connection of transformer

M&L for shifting transformer upto 1000 kVA, 6.6-11KV/433V, from any location and connecting HT/LT side to provide temporary supply during repair of transformer and disconnecting HT/LT connections before installations of repaired transformer location complete all as directed.

M & L in repairs HV side Brass studs threaded both ends of suitable size and length including metal and rubber rings,. Bolts washer, etc. suitable for 500 to 1000 KVA Transformer ( Indoor or Outdoor type), 6.6-11KV/433V, step down/ step up of any make / model complete all as directed

M & L in repairs LV side Brass studs threaded both ends of suitable size and length including metal and rubber rings,. Bolts washer, etc. suitable for 500 to 1000 KVA Transformer ( Indoor or Outdoor type), 6.6-11KV/433V, step down/ step up, of any make / model complete all as directed

S & F in repairs HV/LV side Porcelain Bushing / Insulator of suitable size suitable upto 1000KVA Transformer, Outdoor type, 6.6- 11KV/ 433V , step down/step up, of any make / model complete all as directed.

S & F in repairs Silica Gel container with first fill of Silica Gel transparent type suitable for transformer of capacity 500 KVA to 1250 KVA compete all as directed

M&L for testing of di-electric strength of transformer oil of transformer indoor/outdoor type,6.6KV/433 Volts,before filteration and to remove moisture and impurities and to improve di-electric strength above 48 KV /minute through filtration plant incl filling of new transformer oil for topping up, testing complete all as specified. Filtration of transformer oil by electrically operated transformer oil filtration plant to achive a test result of 48 KV/min for distribution transformer and 80 KV/ minute for power transformer for 2.5 mm gap.( Note: Testing machine and Transformer oil filtration plant as well as dehydration facility will provided by the contractor . II) New transformer oil shall be measured and paid separatelly under respective items).

Supply and fillingTransformer Oil as per IS 335/93 dehydrated to give BDV value not less than 50 KV when tested with 2.5mm gap electrode completecomplete all as specified. Make: Servo/ HP/BP

Supply and filling Silica Gel in air tight container suitable for Dehydrating Breathers of Transformers complete all as specified.

M & L for replacement of the following for 500 kVA to 1000 kVA,6.6/6.6-11KV/ 433V transformer:-

Oil level indicator

Tap changer

Dial type 100mm dia oil temp meter

Air release plug assembly

Drain plug

Gun metal oil drain valve 25mm /40mm

M & L for spray painting to Indoor/Outdoor type, Step up/ step down/ step up Transformer 6.6-11KV/ 433 V installed at different locations after scraping thoroughly the existing corroded paint / rust, filling of cavities and applying one coat of silicon acrylic heat resistant paint of approved quality of approved colour and writing the details such as, SM/MES No. etc. complete all as specified for following capacity. [Note: Necessary shut down of power supply should be granted from the Engr-in-Charge by the contractor before proceeding the work, also electric supply should be restored as early as possible after completion of the work]

500 to 630 KVA

631 to 1000KVA

S & F ACB 2500A, EDO type 4 pole , retofit Type , designed as per exisitng LT panel all as specified and directed.

M & L of the PVC board of appropriate size and thickness duly pasted with computerised letter mentioning " NO SMOKING" , " DANGER 11000 volts with skull and cross painted, " NO ADMISSION EXCEPT ON DUTY, " SM/MES NO." for the transformer/HT breakers/DG sets including accessories etc for the substations including accessories for properly fixing the same on wall/fencing/pole all as directed.

M & L for fixing standard shock treatment chart in English & Hindi duly framed and covered with glass of size not less than 1.5m x 1.5 m all as specified and directed.

Supply , fixing, testing in repairs of JEF ECO SAFE Maintenance Free Grounding Solution set comprising of High tensile low carbon steel rod of 3 Mts length & 25 mm dia with 250 micron ( averaSchneider ) molecularly bonded copper on the outer surface to confirm with requirements of UL467 along with Back-fill compound strictly be a Carbon based conductive concrete type which has a resistivity of less than 0.12 Ohm Mtr as per Clause 14.5D of IEEE : 80 standard. Back-fill compound should be electronically conductive ( Like in metals ) and should not depend on moisture for conduction. JEF Powerfill Loresco compound shall be supplied in 50 Pound Bag. (1 Bag of 50 Pounds required per earthing set). Back-fill comound should be environment friendly, should solidify when mixed with water and set like concrete and should not leach / diffuse into the ground. A suitable earth terminaton clamp should also be supplied along with the set alongwith earth pit weatherproof incl all as specified . Note : Back-fill compund shall not be mixed with any soil while pouring in the bore hole.

S&F for repair of Earth continuity conductor or main earthing lead of following size of galvanised iron strip fixed to wall on batten or recess or chases or buried in ground or drawn in suitable size PVC conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc, as required complete all as specified

M & L for preparation of old surfaces of Transformer foundation and applying two coat of cement based paint on it, all as specified and as directed by Engineer-in-charge

M &L for test point terminal block made out of gun metal or phosphorus bronze size 75 x 25 mm drilled and screwed including 03 Nos 8 mm dia 25 mm long hexagonal head screws to be fixed on steel structure with drilling/tapping and clamping etc all as specified and directed

M&L galvanised pipe including fittings, light grade fixed to poles, on walls laid under road in trenches for protection of underground cable all as specified of 100mm dia complete all as specified and as directed

M&L galvanised pipe including fittings, light grade fixed to poles, on walls laid under road in trenches for protection of underground cable all as specified of 80 mm dia complete all as specified and as directed

Material and labour for cutting bituminous road at a width not more than 45cm and a depth not exceeding 95 cm for laying of pipes across road crossing for cable protection and making good with the existing surfaces with 1:3:6 PCC, complete all as specified and as directed by Engineer-in-charge.

Supply and fix in repairs insulation mat as per IS 15652:2006, having not less than 30kV dielectric strength and having insulation resistance of not less than 1M Ohm, acid retardent, flame retardent with auto glow band, having width of 1.0mtr and length upto 2.0 mtr, of thicness not less than 2.50 mm.

Supply and fixing cost effective, durable and reliable 6.6-11 kV heat shrinkable anti tracking bus bar tubing sleeve of dia 50mm, for Bus bar of VCB's, flame retardent and protection against moisture, dust including all accessories all as specified and as directed

Material and labour for (i) Disconnecting the HT side and earthing connections of the 6.6 / 11kV RMU, (ii) Lifting of RMU with the help of crane, loading on suitable vech to transport it to the workshop and Unloading at workshop for servicing (iii) Servicing / Refurbishing of HT RMU which were affected. (iv) Testing of CT / PT / Protection Relays and checking of all control wiring (v) High Pot on 6.6 / 11kV RMU (vi) Packing RMU in seaworthy wooden full packing as per RMU size (vi) Transportating RMU back to site and lifting it down with the help of crane and reconnecting HT side cables with all accessories required per site. The spare parts required for the repair shall be measured and paid separately under respective items. (Note : Cost of transportation of RMU from the site of work to the workshop and back is deemed to be included in the quoted rate by the contractor)

Supply and Fix 240sq.mm. Aluminium Barrel Lugs

Supply and Fix Heat Shrinkable Sleeves 450mm

Servicing, Testing with refilling of SF6 Gas in RMU

Supply and Fix 6.6 / 11kV RMU Gas Indicator

Supply and Fix KUTSD6 Connector for 6.6 / 11kV RMU

Supply and Fix CATD M4 Connector for 6.6 / 11kV RMU

Supply and Fix End Clamp Connector for 6.6 / 11kV RMU

Supply and Fix CSDPR-V2-200-D-L-N Relay for 6.6 / 11kV RMU

Supply and Fix Multifunction Meter EM6400METSEEM6400NGRSCL1 with RS485 CL-1

Suppy and Fix Terminal Protector Rubber Boot for 6.6 11kV RMU

Supply and fixing in replacement of power pack set including batteries as per existing make and capacities to the VCB's and OCB's including its control wiring with HT breakers as per OEM recommendations and testing in presence of JE/Engr-in-Charge complete all as specified and directed. Note : cost of all minor spare parts for the job is deemed to be included in quoted rate by the contractor.

Material and labour for spray painting of VCB/OCB as per existing colour with fire retardant paint complete all as specified and directed,

Disconnecting and takingout,repairing existing APFC HT 6.6/11 KV VCBs for sevicing & reuse as per existing make from housing and cleaning,rubbing and overhauling the mechanical parts and making serviceable of local/remote electrical operation of the panel including Greasing,oiling,replacement of UNSV Trip coil,breaker charging motor,gear pinion,roller switch and reassembling the same after replacement as required including testing (IR Test,Continuity Test,Tripping Test of earth fault and over current of panel) complete all as specified and directed (Note :All Spares parts of VCBs panel will be Measured and paid sepratly under respective items of this schedule here in after as supply only)

Supply & fixing in replacement of battery 180 AH, 25 plate with initial Charger Specific gravity 12.60 of 12 volts complete all as directed by Engineer-in-Charge.

Supply in replacement of rubber insulating hand glove (pair of two) suitable for working HT 33 KV and confirming to relevant IS complete as approved by GE duly ISI marked all as specified and directed.

Excavation in trenches, for foundation of poles, stays or for laying of cables, not exceeding 1.5 mtr wide and not exceeding 1.5 mtr in depth and getting out as in soft / loose soil complete all as specified & directed.

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

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

M & L of Supplying and laying reinforced precast concrete cable cover, class EHV, type 1 with peak, size 300mm x 230mm x 40 mm over burnt bricks laid dry and flat across the axis of cable, abutting each other with gaps between adjacent bricks not exceeding 10mm complete

M&L for sand cushioning to underground cable in trenches with clean dry river sand for protection of cable complete all as specified and directed.

M&L for boring /drilling by machines/manual horizontally under the road in any type of soil without cutting /disturbing the existing road and inserting GI pipe of any size for drawing the cable. complete all as specified & as directed.

M&L for Danger notice plate of 1.6mm thick mild steel sheet, vitreous enameled white in 11000 volts, with letters, figures and conventional skull and bones in signal red colour and fixed with MS clamps, bolts and nuts of approved size, for HT, 25 x 20 cm size complete all as specified and directed.

Supply and fixing in replacement of integrated all in one type solar street light with lithium ferro phosphate battery, solar panel, solar charger built into the luminaries with pressure dia cast aluminium body designed for mounting on pole with bracket suitable for tilting at various angles with efficacy more than 175 lum/watt with capacity not less than 40W complete all as specified and directed by Engr-In-Charge. Make : Philips cat part No. BRP710LED40CWMRS1 or equivalent make given in Appx B

Supply and fixing in replacement of integrated all in one type solar flood light (IP-66) with lithium ferro phosphate battery (25.6V, 30AH), solar panel, solar charger built into the luminaries with pressure dia cast aluminium body designed for mounting on stand/pole with bracket suitable for tilting at various angles with efficiancy more than 170 lum/watt with capacity not less than 100W complete all as specified and directed by Engr-In-Charge. Note : Cost for material and fixing of required stands for mouting flood lights is deemed to be included in the quoted rate.

Supply and fix in replacement of HT Cable route indicators made up of RCC Slab of min 20cm x 20 cm x 1.2 m (LXBXH) duly white painted and written "MES HT CABLE"/HT STRAIGHT JOINT" as required in Black colour complete all as specified and directed. (Note : The cost of excavation upto 70cm , and PCC of ratio 1:2:4 shall be included in quoted rate)

M/L for draining out transformer oil and cleaning of conservator oil tank of capacity upto 1000 KVA transformers including replacement of rubber cork gasket as per existing size and refilling the same after cleaning complete all as specified and directed.

Supply and fix in repair of Power factor Capacitor, 415 Volts, 3 phase, 50 Hz, MPP-H type of 5KVAR complete all as specified and directed

Supply and fix in repair of Power factor Capacitor, 415 Volts, 3 phase, 50 Hz, MPP-H type of 10 KVAR complete all as specified and directed

Supply and fix in repair of Power factor Capacitor, 415 Volts, 3 phase, 50 Hz, MPP-H type of 20 KVAR complete all as specified and directed

Supply and fix in repair capacitor duty contactor 415 Volts, 3 phase, 50 Hz, MPP-H type of 8.5 KVAr complete all as specified and directed.

Supply and fix in repair capacitor duty contactor 415 Volts, 3 phase, 50 Hz, MPP-H type of 20 KVAr complete all as specified and directed.

S & F ACB 1600A, EDO type 4 pole , retofit Type , designed as per exisitng LT panel all as specified and directed.

Shree Ayyappa Engineering (BID ID -3292104)

Darpan Construction (BID ID -3291668)

sapana enterprises (BID ID -3291993)

DARSHAN CONSTRUCTION Co. (BID ID -3292256)

AGRAWAL ASSOCIATES (BID ID -3291543)

Nexus Infratech (BID ID -3292174)