REPAIR_ ROUTINE MAINT OF 11 KV STEPED DOWN TRANSFORMER OF P8I MAFI SUB STATION I and II ADR ATC SIMULATOR ETC INCLUDING HT CABLE AND OTHER CONNECTED WORK AT SOUTH SIDE RUNWAY UNDER AGE EMI OF GENW VASCO

Amount

Excavation in trenches not exc 1.5 Mtr wide and not exc 1.5 Mtr deep in hard/dense soil getting out and levelling of bottom surface to required level for laying of UG cable complete all as specified and as directed

Excavation in trenches by cutting of road crossing/PCC hard standing, under boundary wall for laying of pipe/cable including making good the existing surface with same finish to match the original finish complete all as specified and directed by Engr-in-charge.

Returning filling in excavated earth work including spreading, levelling, watering and well ramming in layers n.exc 25cm thick in any strata complete all as specified and directed by Engr-in-charge.

Removing excavated soil to a distance n.exc 50m, depositing where directed at a level n.exc 1.5M above the starting point complete all as specified and directed by Engr-in-charge.

Supplying & Laying in trenches Clear Sand for cushioning under ground cable 8 cm below and 15 cm above complete in level all as specified and as directed. (punned thickness of sand will be measured and paid)

Supply and layi un-reinforced precast concrete cable covers, class EHV , type- I with peak, size 300mm x 180mm x 40mm, complete all as specified and directed by Engr-in-charge.

S & F in trench/on wall in repairs GI tubing light grade for road crossing and cable protection of the following sizes as in repairs complete all as specifed & directed :- (a) 80 mm

M & L for graded coarse aggregate (broken stone or boulders) of size 40 mm in sub - station yard for laying all as directed and specified.

S & F in repairs Galvanaised Iron cross arms channel, bracing, support, clamps etc fabricated structured steel, sections, including nuts, bolts, washers etc and cutting to required length beat to any shape drilling holes, fixed on poles or jointed by means of elect welding complete incl painting with 2 coats of aluminum paint over a coat of red oxide primer after preparation of surfaces incl taking down / dismantling the old items complete all as specified and as directed by Engr-in Charge

Supply & Laying , testing and commissioning XLPE cable , PVC insulated, screened PVC bedded galvanised steel strip or wire armoured electric power cable, heavy duty with aluminium conductor 11000 Volts grade (earthed), 3 core 120 sqmm laid in trenches/floor/duct/fixed on poles/through GI tubing in different locations / areas complete all as specified and as directed by Engr-in Charge

S & F in repairs cable jointing kit for 11KV grade cable for Indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 50 to 95 sqmm complete all as specified and as directed by Engr-in Charge

S & F in repairs cable jointing kit for 11KV grade cable for Indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 120 to 185 sqmm complete all as specified and as directed by Engr-in Charge

S & F in repairs cable jointing kit for 11KV grade cable for Straight through joint heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 50 to 95 sqmm complete all as specified and as directed by Engr-in Charge

S & F in repairs cable jointing kit for 11KV grade cable for Straight through joint heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 120 to 185 sqmm complete all as specified and as directed by Engr-in Charge

S & F in repairs of MS Plates (plain or chequered) channels, square cut or notched (ordinary and counter sunk) forming holes, without any attachment cut to required shape and size for cable duct or any other description complete all as specified and as directed.

M & L for painting of checkered plate of any size, by using spray gun, with two coat of synthetic enamel paint of black colour over the surfaces after preparing the old painted surfaces all as directed.

Supply , fixing and testing of CT 11 KV capacity 200-100/5-5Amps for indoor VCB (set of three ) complete all as specified and as directed . Note :- supply of CT set match with existing make and capacity of site .

Supply & fixing in repair, testing of CT 33 KV capacity 400-200-100/1-1-1Amps,highest voltage 36 KV, minimum creepag distance 900 mm, outdoor type oil immersed (set of three ) complete all as specified and as directed . Note :- supply of CT set match with existing make and capacity of site

M & L for PVC insulated unarmoured heavy duty electric cable with copper conductor 1100 V grade with cross section area 4 Core 4 Sqmm complete all as specified and directed by Engr-in-charge.

M & L for servicing of 11KV VCB/bus coupler at various locations/ sub stations, dismantling, cleaning, greasing the complete VCB with attached relays, bus bar etc, insulation testing, setting the contact gap by measuring as required, reassembling the VCB and reinstalling back to its original position checking repairsing the current, circuit panel wiring, relay testing of CT's and provision of minor spares as required complete including operational testing and commissoning complete all as specified and directed by Engr-in-charge. Note :- New major spare parts will be measured and paid under Sch A item No 21 (i) to (xi)

M&L for replacement of the following for HT VCB 11 KV 400 A 25 KA 250MVA Make: CG as approved by GE including dismantling old unserviceable one complete all as specified and as directed.

i) Closing coil 30V DC

ii) Tripping coil 30V DC

iii) Antipumping device 30V DC

iv) LED type indicator lamp assembly ( red ,yelow,below)

v) Vaccum Interupter for indoor VCB

vi) spout incoming side

vii) spout outgoing side

viii) Connector strip 16 way

ix) Earth Fault and over current relay of L & T Madel No MC61A 24-110V

x) Digital type power factor indicator meter

xi) Digital type Voltmeter / Ammeter

M & L for carrying out primary injection test of 11 KV indoor type current transformer (Set of three) of VCB's by using standard injection test method and checking the electrical circuits for fault condition and proper functioning incl submitting the test report complete all as specified and as directed.

Dismantling old and burnt out PT unit 11000/110 volts draw out type epoxy resin cast type taking out contact with lead and bushing from the bus bar and PT, replacing by new one of same model suitable for 11 KV /110 V grade PT unit and re-installation and testing on completion complete all as specified and as directed.

Dismantling old and burnt out outdoor PT unit 33KV/110 volts oil cooled type, isulation class A, max voltage 36KV, taking out contact with lead and bushing from the bus bar and PT, replacing by new one of same model suitable for 33 KV /110 V grade PT unit and re-installation and testing on completion complete all as specified and as directed.

Dismantling old and UNSV power pack unit 230 volts AC input and 30 volts DC out put for VCB Panel from the site, replacement of UNSV burnt outpower pack unit with new one if required incl testing on installation complete all as specified and as directed by Engr-in-charge.

S & F in repairs for epoxy insulator suitable for 11 or 33 KV reel type inside HT feeder pillar box outdoor type including replacement of new nut, bolt and washer on bus bar and base complete all as specified and as directed by Engr-in-charge.

M & L for EHV grade insulating transformer oil.

Filteration of insulating oil with high pressure vaccum filteration plant, after filtration attains BDV upto 60 KV for Transformer, OCB and MOCB complete all as specified and as directed by Engr-in-charge.

S & F in repairs strip type heater 200 watt approx 4"/6" in length complete all as specified and directed.

Supplying and laying synthetic Rubber insulated mats 2 mm thick for voltage upto 3.3 kv for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m complete all as specified and directed.

Supplying and laying synthetic Rubber insulated mats 2.5 mm thick for voltage upto 11 kv for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m complete all as specified and directed.

Supplying and laying synthetic Rubber insulated mats 3 mm thick for voltage upto 33 kv for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m complete all as specified and directed.

S & F in repairs sealed maintenance free battery 2 Volts 100 Amps for UPS supply incl necessary connections complete all as specified and directed.

M & L for taking out the MS duct cover from the cable duct chamber disconnecting the haphazardly laid serviceable HT UG cable of 3 core of 70 to 150 Sq mm from VCB/Any description taking out from cable trenches / ducts and straighten and laying in proper layers incl provn of new identification tags for each cables and connecting back to its original position incl cleaning the cable ducts complete all as specified and directed. .

S & F in repairs for Breather unit with superior quality blue colour silica jel, to maintain the exact value of grade for transformer of capacity 100 KVA to 150 KVA, including taking down unserviceable complete all as specified and directed.

S & F in repairs for Breather unit with superior quality blue colour silica jel, to maintain the exact value of grade for transformer of capacity 200 KVA to 250 KVA, including taking down unserviceable complete all as specified and directed.

S & F in repairs for Breather unit with superior quality blue colour silica jel, to maintain the exact value of grade for transformer of capacity 315 KVA to 400 KVA, including taking down unserviceable complete all as specified and directed.

S & F in repairs for Breather unit with superior quality blue colour silica jel, to maintain the exact value of grade for transformer of capacity 500 KVA to 630 KVA, including taking down unserviceable complete all as specified and directed.

S & F in repairs for Breather unit with superior quality blue colour silica jel, to maintain the exact value of grade for transformer of capacity 1000 KVA, including taking down unserviceable complete all as specified and directed.

S & F in repairs HV insulator with studs nut & washers suitable for 11 KV HV side of transformer 100 KVA to 150 KVA complete all as specified and directed.

S & F in repairs HV insulator with studs nut & washers suitable for 11 KV HV side of transformer 200 KVA to 250 KVA complete all as specified and directed.

S & F in repairs HV insulator with studs nut & washers suitable for 11 KV HV side of transformer 315 KVA to 400 KVA complete all as specified and directed.

S & F in repairs HV insulator with studs nut & washers suitable for 11 KV HV side of transformer 500 to 630 KVA complete all as specified and directed.

S & F in repairs HV insulator with studs nut & washers suitable for 11 KV HV side of transformer 1000 KVA complete all as specified and directed.

S&F in repairs LV insulator with studs nut & washers suitable for11 KV/433V LV side of transformer of Capacity 100 KVA to 150 KVA complete all as specified and directed

S&F in repairs LV insulator with studs nut & washers suitable for11 KV/433V LV side of transformer of Capacity 200 KVA to 250 KVA complete all as specified and directed

S&F in repairs LV insulator with studs nut & washers suitable for11 KV/433V LV side of transformer of Capacity 315 KVA to 400 KVA complete all as specified and directed

S&F in repairs LV insulator with studs nut & washers suitable for11 KV/433V LV side of transformer of Capacity 500 KVA to 630 KVA complete all as specified and directed

S&F in repairs LV insulator with studs nut & washers suitable for11 KV/433V LV side of transformer of Capacity 1000 KVA complete all as specified and directed

Servicing and repairs to carry out maintenance of 11KV/433V transformer including the following works upto 250 KVA capacity complete all as specified and as directed (a) Removing from platform and disconnecting electrical connection from HT and LT side. (b) Dismantling the transformer, drain out transformer oil, lift the cover,coil assembly keep up the assembly in oven upto the preparation of inside chambers by cleaning inside, scraping complete all around old parts of the transformer. (c) M & L for two coats of oil resistance painting internal (inside transformer) over a coat of red oxide primer. (d) Cleaning the core iron sheet laminations asssembly by oil complete,removing the carbon sediments, dust in the coil and core gently without making any damage to coil and core. (e) Re-assembling all dismantled parts including provision of new gasket ,nut,bolts,refilling with transformer oil and transporting back to original location including elecric conection testing and commissioning complete. (f) Necessary plate work incuding welding for preventing oil leakage if any. Note :- i) Oil filtration,supply of new oil will be measured separately. (ii) All petty parts including nut, bolts, gasket minor weldings are deemed to be included the rate quoted.

Servicing and repairs to carry out maintenance of 11KV/433V transformer including the following works upto 500 KVA capacity complete all as specified and as directed (a) Removing from platform and disconnecting electrical connection from HT and LT side. (b) Dismantling the transformer, drain out transformer oil, lift the cover,coil assembly keep up the assembly in oven upto the preparation of inside chambers by cleaning inside, scraping complete all around old parts of the transformer. (c) M & L for two coats of oil resistance painting internal (inside transformer) over a coat of red oxide primer. (d) Cleaning the core iron sheet laminations asssembly by oil complete,removing the carbon sediments, dust in the coil and core gently without making any damage to coil and core. (e) Re-assembling all dismantled parts including provision of new gasket ,nut,bolts,refilling with transformer oil and transporting back to original location including elecric conection testing and commissioning complete. (f) Necessary plate work incuding welding for preventing oil leakage if any. Note :- i) Oil filtration,supply of new oil will be measured separately. (ii) All petty parts including nut, bolts, gasket minor weldings are deemed to be included the rate quoted.

Servicing and repairs to carry out maintenance of 11KV/433V transformer including the following works upto 630 to 1000 KVA capacity complete all as specified and as directed (a) Removing from platform and disconnecting electrical connection from HT and LT side. (b) Dismantling the transformer, drain out transformer oil, lift the cover,coil assembly keep up the assembly in oven upto the preparation of inside chambers by cleaning inside, scraping complete all around old parts of the transformer. (c) M & L for two coats of oil resistance painting internal (inside transformer) over a coat of red oxide primer. (d) Cleaning the core iron sheet laminations asssembly by oil complete,removing the carbon sediments, dust in the coil and core gently without making any damage to coil and core. (e) Re-assembling all dismantled parts including provision of new gasket ,nut,bolts,refilling with transformer oil and transporting back to original location including elecric conection testing and commissioning complete. (f) Necessary plate work incuding welding for preventing oil leakage if any. Note :- i) Oil filtration,supply of new oil will be measured separately. (ii) All petty parts including nut, bolts, gasket minor weldings are deemed to be included the rate quoted.

M & L for rewinding of transformer,including dismantling,drain out transformer oil and removing the core coil assembly from transformer remove the weak /unserviceable HT coil assembly rewinding with correct gauge super enamelled copper wire including drying,baking etc complete and remove the secondary coil assembly remove the insulation rewind with fresh coil and re-insulated. Assembling the primary and secondary coil in core, re-assembling the transformer complete refill with transformer oil, install, test and commissioning complete of following capacity complete all as specified and as directed:-

(a) Transformer upto 250 KVA Capacity

(b) Transformer 315 to 500 KVA Capacity

(c) Transformer 630 to 1000 KVA Capacity

All as per item No. 53 here in before, but for 430 V LT side limbs for following capacities :-

(a) Transformer upto 250 KVA Capacity

(b) Transformer 315 to 500 KVA Capacity

(c) Transformer 630 to 1000 KVA Capacity

Notes for Sl item No. 53 & 54 above:- (i) Additional oil required for top up of transformer after filteration shall be measured and paid for separately. (ii) Rewinding of limb shall be carried out only after the inspection of Transformer by the Departmental authority at Authorized maintenance work shop. (iii) Cost for transportation and lifting of Transformer shall be measured and paid separately.

M & L for Transportation and lifting of Transformer 11KV/433V of capacity upto 500 KVA including loading and unloading by suitable capacity crane to workshop for repair in a load carrier vehicle from Electrical installations at INS Hansa area to workshop and returning back to site at its existing installation place complete all as specified and as directed.

M & L for Transportation and lifting of Transformer 11KV/433V of capacity 500 KVA to 1000 KVA including loading and unloading by suitable capacity crane to workshop for repair in a load carrier vehicle from Electrical installations at INS Hansa area to workshop and returning back to site at its existing installation place complete all as specified and as directed.

Supply and fill new silica jel, superior quality in the breather unit of transformer from 100 KVA upto 500 KVA incl taking out the old unserviceable one omplete all as specified and as directed.

Cleaning of Transformer surface of capacity less than 500 KVA for rusted area, preparing the surface and painting with one coat of acrylic paint of same colour as earlier complete all as specified and directed by Engr-in-charge

Cleaning of Transformer surface of capacity 500 KVA to 1000 KVA for rusted area, preparing the surface and painting with one coat of acrylic paint of same colour as earlier complete all as specified and directed by Engr-in-charge

Taking out the old HT 11 KV UG serviceable cable of 3 core 95/120 Sq mm from trenches/ floors/ walls and relaying/diversion/jointing the same in the new trenches/new location as directed and connecting complete all as specified and directed by Engr-in-charge

M & L for removing vegitation, grass, scrubs and bushes growing in Sub station yard along with fancing by mannually / mechanically and keep the sub station yard neat and clean complete all as specified and as directed. Note :- Unit rate quoted deemed to include to keep the installation neat and clean through out the period of contract and each cleaning will be measured and paid separately.

M & L for Cutting and trimming of tree branches 3 mtr all around of any size which is obstructing illumination of street light and touching LT / HT Over head line by using required tools and plants incl removing trimmed tree branches complete all as specified and as directed. (Note : Each cleaning will be measured and paid separetely)

Carry out Material/machineries labour for fault finding of 11 KV HT under ground cable of length up to 1.5 KM in case of cable fault such as short circuit/burn out/earth foult etc including carryout necessary hypot test by injection high voltage up to 50 KV complete all as specified and as directed.

Calibration of VCB and RMU by otherised OEM representitive using software and check proper functioning of braker for fault condition. (Note: contractor should arrange prior permission and arrangement for technician and material entry for testing )

Material and labour for testing of malfunctioning transformer of 11 KV by authrised technician of companies which can perform Voltage Ratio test, IR value test, Short circuit test, Magnetic balance test & excitation test complete and submitting the test report duly signed by Technician and contractor to the department.

M & L for Earthing complete with copper earth plate electrode 600 x 600 x 3.15 mm thick buried directly in ground earth pit not less than 2.25mtr deep below normal ground level with top edge of the plate not less than 1.5 mtr below normal ground level connected to copper strip size 20 x 3 mm thick by mean of nuts/bolts, check nuts and washers of brass as shown in electrical plate No. 5 of SSR part-I including necessary excavation and earth work, GI Pipe 15 mm bore light grade for watering with Funnel, wire mesh and protection to earthing strip shall be provided with GI pipe light grade 32 mm dia up to 7.5 mtr from the earth plate electrode and refilling of soil including adequate quantity of charcoal dust and common salt etc & earth work in any strata, PCC pit chamber in cement mortar 1:3:6 type C-2 with 40 mm thick Precast RCC cover slab 1:2:4 type B with 8 mm dia TMT bar and handle with lifting hooks including testing any type complete all as specified and directed by Engr-in-charge

S & F in repairs CO2 type fire extinguisher with trolley with delivery hose, mounting clamps, and standard accessories of capacity 9 kg capacity complete all as specified and as directed.

S & F in repairs CO2 type fire extinguisher with trolley with delivery hose, mounting clamps, and standard accessories of capacity 6.5 kg capacity complete all as specified and as directed.

Servicing / repairing of RTCC Panal board installed at MRS hansa for automatic voltage tap changer and replacing the following unserviceable parts all as specified and as directed by Engr-in-charge. Note :- (i)Misscalenouse items like cable tie lugs feruls glands etc included in this quited rate. (ii) Wiring of full panel & testing complete included in this quited rate.

i) Automatic Voltage Regulator

ii) Automatic Tap changer regulator

iii)Raise push button

iv) LED type indicator lamp assembly ( red ,yelow,below)

v) Control fuse 6 Amps

vi) MCB 4 pole 16 Amps Capacity

vii) 2.5 sqmm wire coil

viii) Lugs ferul cu for conection

ix) Hoter

DURGAI ELECTRICALS (BID ID -3514579)

Shree Ram Enterprises (BID ID -3514014)

Shree Ayyappa Engineering (BID ID -3515416)

J D ENTERPRISES (BID ID -3521237)

S and G Constructions (BID ID -3520667)