Tender For Overhauling, Cleaning And Servicing Of 250 Kva Oil Type Indoor Transformer Including Earthing Installation In The Sub-Station Of The District Judges Court, Barasat, North 24 Parganas.
Tender Value
Ref. Documents
Estimated cost
Bid Submission
21 Sep 2026
10 days left
EMD
9730
Bank guarantee accepted
Document Fee
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Non-refundable
Tender Type
Online
Tender Overview
Organization
Tender ID
Competition Type
NCB
Bidding Type
Tender
Location / State
24 Paraganas North → West Bengal
EMD Exemption
Not Available
Quantity
Not Available
Website
Contact Person
Address
Project Description
Tender for Overhauling, Cleaning And Servicing Of 250 Kva Oil Type Indoor Transformer Including Earthing Installation In The Sub-Station Of The District Judges Court, Barasat, North 24 Parganas.
BOQ
| Sl. No. | Item Description |
| 1 | Drawing sample of oil from the transformer for ascertaining the acid value and submission of report for the same. |
| 2 | Drawing sample of oil from the transformer for BDV Test and submission of report for the same. |
| 3 | Disconnecting the L.T. winding of the Transformer from the terminal bushing with proper care to avoid damage. |
| 4 | Reconnecting the L.T.winding of the core with terminal bushing with proper care to avoid damages. |
| 5 | Pumping out the old damaged oil from the transformer by utlizing electric power of the campus and storing same the emty container. |
| 6 | Lifting the top lid cover with conservator and refixing the same with supply of necessary gaskets as required. |
| 7 | Dismantling the 4 nos. L.T. terminal bushings and refixing same with necessary oil seals etc as required. |
| 8 | Washing the core and windings with forced warm oil spraying by fresh transformer oil utilizing separate electric power of the campus including time to time testing with 2.5 KV Megger for measuring of insulation resistance. |
| 9 | Servicing the breather including filling the same by S&F. silica jel. |
| 10 | Supplying & pouring of New transformer oil for filling and topping up the transformer |
| 11 | Filtration of oil to raise the dielectric strength as per B.I.S. specification by using electric power of the campus including submission of test certificate of the tested oil. |
| 12 | Transportation of oil filtering maching and accessories to & from Job site |
| 13 | Charge for Inspection of HT OCB to identify and rectify various defects within it to perform satisfactorily as per direction of EIC. |
| 14 | Servicing of H.T. 1-Panel Gear by cleaning the parts oiling the cams gears spring shaping the contacts if required checking the insulation value by H.T.measuring kit as per derection of EIC. |
| 15 | Cleaning of VI Housing and Breaker spout as per direction of EIC |
| 16 | Tightening of LT terminals of CT, PT and control terminals as per direction of EIC. |
| 17 | Charge for Testing CT Ratio & Insulation test as per direction of EIC. |
| 18 | Panel aligment incl. wiring checking & tightening as per direction of EIC. |
| 19 | Checking of Transformer Protection Auxiliary relays as per direction of EIC. |
| 20 | Servicing of L.T. Panel by cleaning the parts oiling the cams gears spring shaping the contracts if required checking the insulation value by L.T.Measuring Kit as per direction of EIC |
| 21 | Checking and servicing the H.T.tap changing switch of the transformer by cleaning same with contact points including polishing as necessary. |
| 22 | Testing the overload and earth fault tripping coils of all the gears of H.T.Single Panel Switch Board by secondary injection Relay Testing Set incld. making necessary calibration for proper tripping according to full load current of the transformers incld. arrying theRelay Testing set to and from site. |
| 23 | Earthing with 80 mm dia (Make- TATA - Medium) 3.04 meter long GI Pipe 13mm dia X 80mm long GI bolts. Double Nuts double washers at the both ends of Standard GI(Hot Dip) wire and S&F. 50mm dia GI pipe Protection (3- meter long) to be filled party under ground levelpartly above ground level to an average depth of 3.05meter for moram soil. |
| 24 | Making 450mmX 450mm Earth pit having 40 Nos brick wall with inside plastering and with heavy duty 6mm Spcial type M.S. Pit cover to cope with the load of a loaded truck. |
| 25 | Extra for treatment of soil by using salt and charcoal/coke for pipe electrode. |
| 26 | Supply & Fixing earth busbar of galvanized (Hot Dip) GI Flat 50mm x 6mm dia on wall having clearance of 6mm from wall including providing drilled holes on the busbar complete with GI bolts, nuts, washers spacing insulator etc. as required. |
| 27 | Insulating the 50x6 mm GI flat incl. S&F black heat shrink PVC sleeve etc. The PVC tube sleeve to be inserted on the GI flat and heat shrinkd by heating apparatus by skilled technician carefully without damaging the PVC sleeve as per direction of the EIC ( for transformer neutral earth busbar). |
| 28 | Dismantling all types of plain cement concrete works, stscking servicable materials at site and removing rubbish as directed with in a lead of 75mm. |
| 29 | Ordinary cement concrete with graded stone chips (20 mm) nominal size exluding shuttering and reinforcement if any in ground floor as per relevant IS Codes. (Pakur variety) |
| 30 | Testing of the Sub-station Euipment & System Earthing value by (0-10Ohms) Earth tester. Please Enable Macros to View BoQ information |
AI Tender Summary
Tender Timeline
Sep 07, 2026
11:30 IST
Tender Published
Tender notice published.
CompletedSep 21, 2026
17:00 IST
Bid Submission Deadline
Online submission via eProcurement portal.
Upcoming · 10 daysSep 23, 2026
Bid Opening Date
Technical bids will be opened and evaluated.
Upcoming · 12 daysTender Documents
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