Tender For Repair/Maint Of Transformers At 33 Kv Mrs Nofra, Substations And Vcbs And Repair/Maint Of Yards Of 11 Kv Substation And Connected Works Under Ge(Nw) Vasco
Tender Value
75 Lakhs
Estimated cost
Bid Submission
29 Oct 2026
27 days left
EMD
2.25 Lakhs
Bank guarantee accepted
Document Fee
1000
Non-refundable
Tender Type
Online
Tender Overview
Organization
Tender ID
Competition Type
NCB
Bidding Type
Tender
Location / State
goa → Goa
EMD Exemption
Available
Quantity
Not Available
Website
Contact Person
Address
Project Description
Tender for Repair/Maint Of Transformers At 33 Kv Mrs Nofra, Substations And Vcbs And Repair/Maint Of Yards Of 11 Kv Substation And Connected Works Under Ge(Nw) Vasco
BOQ
| Sl. No. | Item Description |
| 1 | Material and labour for rewinding of transformer, including dismantling and drain out transformer oil, removing the core coil assembly from transformer, remove the weak /unserviceable 11KV HT side coil assembly rewinding with correct gauge super enameled copper wire including drying, baking etc complete and assembling the primary and secondary coil in core, re-assembling the transformer complete with filtration and refill the transformer oil, install, test and commissioning complete all as specified and as directed for the following capacities of transformers mentioned. |
| 2 | (a) Transformer up to 100 to 160 KVA Capacity |
| 3 | (b) Transformer 200 KVA to 250 KVA Capacity |
| 4 | (c) Transformer 315 KVA to 400 KVA Capacity |
| 5 | (d) Transformer up to 500 KVA Capacity |
| 6 | (e) Transformer up to 750 KVA 1250 KVA |
| 7 | All as per item No. 01 here in before, but for 430 V LT side limbs for following capacities :- |
| 8 | (a) Transformer up to 100 to 160 KVA Capacity |
| 9 | (b) Transformer 200 KVA to 250 KVA Capacity |
| 10 | (c) Transformer 315 KVA to 400 KVA Capacity |
| 11 | (d) Transformer up to 500 KVA Capacity |
| 12 | (e) Transformer 700 KVA up to 1250 KVA |
| 13 | Notes for Item Sl Nos. 01 & 02 :(i) Additional oil required for top up of transformer after filtration 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. |
| 14 | Disconnecting of HT supply and Material and labour for overhauling, servicing and preventive maintenance of 33 KV VCB 7 Nos at Nofra substation, 400/630 Amp outdoor type and controlling panel and indoor and including remote and manual operating panels after disconnecting the 33 KV including earthings the entire system properly and cleaning the isolating contacts, removing dust particle from bus bar chamber spout gear mechanism including greasing of the moving parts, cleaning of the moving/stationary contact with CTC. Removing of moisture by means of hot air blower, renewal of gaskets, nut/bolts etc entire trolley components and replacement of all unserviceable spares, providing the necessary packing material at incoming and outgoing cable entry, inserting in trolley, testing commissioning and putting on the supply on load complete all as required at site and as directed. Scope of works consist of following, the spares required shall be measured follows on items no 53 Note : Unit rate including two preventive maintenance (interval of three months) during the contact period of contract and replacement of Hark fuse, AC and DC MCB of SP/DP at control circuit in each VCB as required at site to make system functional. |
| 15 | Servicing and repairing/ carrying out maintenance of 11KV/440V transformer including the following works for 750 KVA capacity as follows : (a) Dismantling the transformer, drain out transformer oil, cleaning inside, scraping complete all around parts of the transformer.(b) Re-assembling all dismantled parts including provision of new gasket, nut, bolts, filtration with refill transformer oil including electric connection testing and commissioning complete all as specified and as directed.NOTES :-i) Transformer oil filtration and additional transformer oil shall be measured and paid separately.ii) All petty parts including nut, bolts, gasket and minor welding /patch work are deemed to be included in the rate quotediii) The rate for transport to the maintenance workshop and lifting of transformer by crane shall be measured separately. |
| 16 | All as per item No. 4 here in before, but for 500 KVA all as specified and as directed. |
| 17 | All as per item No. 4 here in before, but for 315 to 400 KVA all as specified and as directed. |
| 18 | All as per item No. 4 here in before, but for 200 to 250 KVA all as specified and as directed. |
| 19 | All as per item No. 4 here in before, but for up to 100 to 160 KVA all as specified and as directed. |
| 20 | Disconnecting HT 11 KV incoming side and LT 430 V outgoing side connections from defective / repairable 11KV/ 430 V Transformer of capacity up to 750 KVA including earthing strips, loading and unloading to authorized maintenance workshop for repair in a suitable load carrier vehicle with using required capacity crane / Manual tripod and vehicle from Outdoor / indoor 11KV Substation yard at Varunapuri / Nofra to authorized maintenance workshop and return back at its existing installation place including testing, commissioning on site complete all as specified and as directed. |
| 21 | Supply and fix HT bushing insulator, Brass metal studs nut & washers suitable for HT bush side of transformer up to 100 to 160 KVA all as specified and as directed. |
| 22 | All as per item No.10 here in before, but for 200 to 250 KVA capacity of transformer all as specified and as directed. |
| 23 | All as per item No.10 here in before, but for 315 to 400 KVA capacity of transformer all as specified and as directed. |
| 24 | All as per item No.10 here in before, but for 500 KVA capacity of transformer all as specified and as directed. |
| 25 | All as per item No.10 here in before, but for 750 KVA capacity of transformer all as specified and as directed. |
| 26 | Supply and fix LT bushing insulator, Brass metal studs nut & washers suitable for LT 415 Volt bush side of transformer up to 100 to 160 KVA capacity of transformer all as specified and as directed. |
| 27 | All as per item No.15 here in before, but for 200 to 250 KVA capacity of transformer all as specified and as directed. |
| 28 | All as per item No.15 here in before, but for 315 to 400 KVA capacity of transformer all as specified and as directed. |
| 29 | All as per item No.15 here in before, but for 500 KVA capacity of transformer all as specified and as directed. |
| 30 | All as per item No.15 here in before, but for 750 KVA capacity of transformer all as specified and as directed. |
| 31 | Supply and filling new EHV grade insulating transformer oil complete with minimum BDV not less than 60 KV all as specified and as directed. |
| 32 | Filtration of existing insulating oil with high pressure vacuum filtration plant operated by DG set to get BDV 60 KV after filtration attains BDV not less than 60 KV for Transformer complete all as specified and as directed.Notes :-(a) Transformer shall be kept in OFF position during filtration.(b) Temperature of oil should be kept below 75 ºC during filtration. |
| 33 | Supply and replace of fabricated transformer HT/LT cable box cover plate suitable for HT/LT side of transformer with necessary cutting, bending making holes including making sheet in required shape along with gasket, nut, bolts, washers etc and including painting two coats as per existing painting for transformer of any capacity all as specified and as directed. |
| 34 | Supply and fill silica Gel for breather of superior quality for transformer breather all as specified and as directed. |
| 35 | Supply and fix breather unit of transparent PVC material including its replacement for transformer of capacity up to 100 KVA all as specified and as directed. |
| 36 | All as per item No. 24 here in before, but for 200 to 250 KVA capacity of transformer all as specified and as directed. |
| 37 | All as per item No. 24 here in before, but for 315 to 400 KVA capacity of transformer all as specified and as directed. |
| 38 | All as per item No.24 here in before, but for 500 KVA capacity of transformer all as specified and as directed. |
| 39 | All as per item No.24 here in before, but for 750 KVA capacity of transformer all as specified and as directed. |
| 40 | All as per item No. 24 here in before, but for 33/11 KV 3.15 MVA capacity of Transformer all as specified and as directed. |
| 41 | All as per item No. 24 here in before, but for 33KV/415V 50 KVA capacity of Transformer all as specified and as directed. |
| 42 | Supply and fix radiator fins of the transformer with drain out the transformer oil including refilling the same after repair/replace, also remove the unserviceable part of the transformer radiators fins carefully and fix / weld new radiator fin assembly in place of removed unserviceable radiator fins complete suitable for :- |
| 43 | (a) Transformer up to 100 to 160 KVA Capacity |
| 44 | (a) Transformer up to 250 KVA Capacity |
| 45 | (b) Transformer 315 KVA to 500 KVA Capacity |
| 46 | (c) Transformer 750 KVA Capacity |
| 47 | Material and labour for painting of transformer outside of body with all accessories completely, including cleaning the body scrubbing thoroughly and applying two coats of synthetic enamel existing shade of paint over a coat of red oxide primer to transformer of capacity up to 100-750 KVA and writing SM/MES No and Capacity of transformer with white colour letter all as specified and as directed. |
| 48 | All as per item No. 28 here in before, but for 33/11 KV 3.15 MVA capacity of Transformer all as specified and as directed. |
| 49 | Material and labour for replacement of conservator unit complete including dismantling the existing body by gas cutting and provision of suitable capacity conservator unit as per existing design and fixing the same by gas welding, install testing and commissioning complete for satisfactory operation of transformer 11KV/430V up to 750 KVA capacity all as specified and as directed. |
| 50 | Supply and fix temperature gauge dial thermometer with a bimetal sensing system suitable size for transformer of any capacity all as specified and as directed. |
| 51 | Supply and fix Oil level indicator glass of existing size of the transformer of any capacity including replacement of allied gaskets complete and draining out transformer oil from conservator and refilling all as specified and as directed. |
| 52 | Material and labour for fixing of lugs on LT cable to connecting on LT side bushing by removing old lugs fixed on LT bushing complete for 95 to 400 Sqmm 3.5 core cable all as specified and as directed. |
| 53 | Supply and fix HT bushing insulators brass metal studs, nuts & washers suitable for 33 KV side of 3.15 MVA Capacity Power Transformer all as specified and as directed. |
| 54 | Material and labour for fault finding for Transformer 11KV/433V of Capacity up to 750KVA including dismantling LT and HT cable connection, checking the transformer winding for open circuit, short circuit or internal short circuit LT/HT bushing failure etc all as specified and as directed. |
| 55 | All as per item No.39 here in before, but for 33/11 KV 3.15 MVA capacity of Transformer all as specified and as directed.Notes for Item Sl No.39 & 40 :-i) Inspection and fault location shall be carried through authorised agencies.ii) Equipment required for fault finding shall be provided by the contractor. |
| 56 | Repair and reconditioning of 3.15 MVA, 33KV / 11KV, Transformer :(i) Disconnecting of all incoming and outgoing elect connections/earthing strips from defective/repairable 33/11 KV step down outdoor type transformer of capacity 3.15 MVA oil cooled type from 33 KV Power Main Receiving Station at NOFRA, shifting to workshop for repairs/rewinding purpose in a load carrier vehicle by using required capacity crane and bring back the same after repairs works.(ii) Dismantling 33/11 KV 3.15 MVA capacity Transformer body, opening top cover and lifting core and winding from body in presence of Engr-in-charge and jointly checking all defective items/windings for repairs work complete as directed.(iii) Cleaning the core stack-coil assembly with clean oil at appropriate pressure for removing settled dirt/ sludge, replacement of failed windings, reassembly of core, heating the stack assembly in drying chamber for improving IR value and coating the coils with one coat of insulating varnish.(iv) Scrubbing the tank, radiators, conservator and all ferrous parts welded to tank with wire brush/buffing process and cleaning the entire external surface of the tank rust-free. Painting the outer surface of tank, radiators, conservator and ferrous parts with one coat of red oxide & two coats of super enamel grey paint.(v) Refixing all attachments/accessories to tank by providing new sealing gaskets/ rubber washers. Reassembling the transformer by placing and reconnecting stack assembly to terminals, closing top cover by providing new rubberized cork sheet gaskets.(vi) In house testing of transformer and Bring back the same after repairs works and reinstall at the same place including testing, commissioning on site/area , connecting the all removed incoming and out going elect cable connections complete all as directed by Engineer-in-charge |
| 57 | Supply and fixing of radiators for 33/11 kV 3.15 MVA of suitable size transformer at MRS Nofra |
| 58 | Servicing of Buchholz relay of transformer 11KV/430V of capacity 400/500 KVA including checking all components and circuits and replacement of minor parts like worn-out hinges, flapper, float etc and resetting including testing and commissioning complete all as specified and as directed. |
| 59 | All as per item No. 43 here in before, but for 33/11 KV 3.15 MVA capacity of Transformer all as specified and as directed. |
| 60 | Material and labour for lightning arrestor (LA) zinc oxide type complete with all fittings transmission class, discharge capacity 10 KA, suitable for 12 KV complete all as specified and as directed. |
| 61 | Repairing / Servicing the air break isolating switch 11 KV 200 Amps by replacing the defective major spares including provn of worn out bolts nuts etc, applying petroleum jelly on moving/ fixed contacts all as specified and as directed.Note :- Major spare shall be measured & paid separately under relevant items of item No. 49 |
| 62 | All as per item No. 43 here in before, but for 33/11 KV 3.15 MVA capacity of Transformer all as specified and as directed. |
| 63 | Material and labour for replacement of copper winding coil for one limb on HV and LV side for 33/11 KV 3.15 MVA transformer at Nofra MRS |
| 64 | Supply only Air break switch spares |
| 65 | (a) Male contact/moving Contact Blade |
| 66 | (b) Female contact/Fix Contact Jaw |
| 67 | (c) Tinned copper Flexible jumper 200A/400 A |
| 68 | (d) MS jumper carrier |
| 69 | (e) Back Connector plate |
| 70 | (f) Petroleum Jelly |
| 71 | Supply, Fixing and testing of metering & 33 KV protection type Potential Transformer (PT), outdoor Oil cooled Type, single Phase, single pole, Earth Type, conforming to IS 16277 : part 1 (2016) & part 3 (2015), ratio 33KV/110 V, HSV:36KV IL:36/70/170KVP, burden : 200 VA, accuracy class : 0.5, VF : 1.2 cont. & 1.5 for 30 seconds, freq : 50 Hz insulation class : A as per approved design by GSEB duly tested, sealed & certified by MRT, Electricity Department, Govt of Goa including dismantling old existing PT all as specified and as directed. |
| 72 | Supply, Fixing and testing of metering & protection Current Transformer (CT) resin cast dry type indoor type of 11 KV capacity dual ratio 100-50/5 Amps, 15 VA burden class I accuracy for metering and 15 VA/5P-10 for protection including dismantling old existing CT all as specified and as directed. |
| 73 | Supply, Fixing and testing of metering & protection Potential Transformer (PT) resin cast dry type indoor type of 11 KV capacity ratio 11 KV/ 110 V, 200 VA burden including dismantling old existing PT all as specified and as directed. |
| 74 | Material and labour for primary injection test of 33 KV current transformer and checking the electrical circuits for fault condition and proper functioning and also submitting the test report all as specified and as directed. |
| 75 | Material and labour for primary injection test of 11 KV current transformer and checking the electrical circuits for fault condition and proper functioning and also submitting the test report all as specified and as directed. |
| 76 | Material and labour for primary injection test of 11 KV or 33 KV Potential transformer by applying low voltage on HV Side including testing of secondary wiring for its healthiness all as specified and as directed. Testing and calibration of Relays, CTs, PTs etc shall be carried through OEM approved agencies and Original test results shall be submitted in triplicate. |
| 77 | Material and labour for replacement of the following for outdoor VCB 33 KV 800 A 750 MVA fault level 36V-26/2000 make: Crompton Greaves/as approved by GE and all as directed including dismantling old unserviceable one. |
| 78 | i) Closing coil and Tripping coil 30V DC |
| 79 | ii) Spring charging motor 30V DC |
| 80 | iii) Anti pumping device 30V DC |
| 81 | iv) 33 KV porcelain bushing for VCB Top |
| 82 | v) 33 KV porcelain bushing for VCB bottom |
| 83 | vi) Earth Fault and over current relay of L & T Model No MC61A 24-110V |
| 84 | vii) Digital type power factor indicator meter |
| 85 | Excavation in trenches not exceeding 1.5 m width and not exc 1.5m in depth getting out in hard/dense soil taking down UG cable any size. |
| 86 | Excavation in trenches not exceeding 1.5 m width and not exc 1.5 in depth getting out soft/disintegrated for laying and taking down UG cable of any size |
| 87 | Returning filling in including spreading leveling watering and well ramming in layers not exceeding 25 cm in thick using excavated hard/dense soil. |
| 88 | Removal of surplus soil to a distance not exceeding 50 m and depositing where directed by Engr-in-charge. |
| 89 | Supply and laying HT XLPE cable insulated , screened, PVC bedded , galvanised steel strip armoured, electric power cable (Heavy duty) with aluminium conductor, cross sectional area 95 Sqmm 3 core 11KV grade, including dismantling of existing cable. |
| 90 | Supply and laying HT XLPE cable insulated , screened, PVC bedded , galvanised steel strip armoured, electric power cable (Heavy duty) with aluminium conductor, cross sectional area 50 Sqmm 3 core 11KV grade, including dismantling of existing cable. |
| 91 | Material and labour for fixing GI tubing light grade 80 mm dia use for the protection of cable all as specified and directed by Engr-in-Charge. |
| 92 | Material and labour for High density polyethylene pipes (HDPE) DWC Pipe of pressure rating PN 6 (SDR 21) 110/95 mm dia laid in trenches for cable protection complete all as specified and directed of following sizes:- |
| 93 | Material and labour for road cutting including excavation in trenches for laying HT UG cable in pipe not exc 45 cm wide and n.exc 60 cm depth or as per site requirement for laying of GI pipe 100 mm dia light grade & making good the disturbed surfaces with cement concrete (1:3:6) type C-1 and top surface neatly finished as per existing to match with the existing complete all as specified . Note :- 80 mm GI pipe (light grade) will be paid and measured under separate item . The cut /excavated surface will be repaired on same day with PCC failing which a penalty of Rs 500 per day will be recovered from contractor dues. |
| 94 | Supply and laying LT UG cable 2.5 Sqmm 14 core XLPE insulated armoured heavy duty 1100 volts grade with copper conductor including centre gland, lugs, jointing materials etc laid in trenches or fixed it to wall including dismantling of existing cable of following sizes:- |
| 95 | Material and labour for earthing complete with galvanized steel earth plate electrode of size 60cm x 60cm x 6 mm thick buried directly in ground earth pit not less than 3 m deep below the ground level with top edge of the plate n. less than 1.5 m below ground level and filling with cotton soil of volume 0.5 Cum brought from outside and Magnesium sulphate of 100 kg, salt of 100 kg and charcoal of 100 kg and connected to GI Strip 32 x 6 mm by means of bolts ,nuts ,checks nuts and washers of galvanized steel including necessary earth work and excavation in any strata and PCC 1:3:6 type C2 chamber and chamber RCC cover and light grade GI pipe 50 mm dia of required length for protection of GI strip and water funnel and wire mesh with GI pipe medium grade 20 mm dia etc complete all as per electrical plate No. 3 of SSR Part-I and as directed including connections and testing on completion all as specified and as directed.Note : GI earth strip up to 7.5 RM is included in the unit rate quoted. |
| 96 | Supply& Fix installation of 11 KV outdoor type gang operated air break switch triple pole mechanically operated mounted on insulator and steel frame, with operating mechanism worked from ground level for current rating up to 200 amps complete all as specified and as directed. (cost of GOD includes cost of GI Pipe required for operation |
| 97 | Removing grass and bushes including its roots growing at substation yard and keep the sub station yard neat and clean complete all as specified and as directed. Note :- one length measured in six months. |
| 98 | Cutting/trimming of tree branches under OH LT/HT electric line including cleaning up to 1.00 mtr horizontal distance on both sides of OH electric line from ground level of the poles including removing all creepers small bushes etc of under OH line up to 30 metre each span complete all as specified and directed.(Note: Materials/T&P like Axes, Dew, rope and the like will be provided by the contractor without any extra cost to the Govt). |
| 99 | Material and labour for coarse aggregate taking out old coarse aggregate(broken stone or boulders) of any size for spreading and leveling at substation yard all as directed and specified Please Enable Macros to View BoQ information |
AI Tender Summary
Tender Timeline
Oct 01, 2026
11:30 IST
Tender Published
Tender notice published.
CompletedOct 29, 2026
17:00 IST
Bid Submission Deadline
Online submission via eProcurement portal.
Upcoming · 27 daysOct 31, 2026
Bid Opening Date
Technical bids will be opened and evaluated.
Upcoming · 29 daysTender Documents
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