Tender For Annual Rate Contract For Servicing And Overhauling Of Transformers At Aod Refinery, Digboi And Iocl Dr Township.
Tender Value
39.34 Lakhs
Estimated cost
Bid Submission
28 Sep 2026
0 days left
EMD
10000
Bank guarantee accepted
Document Fee
Ref. Documents
Non-refundable
Tender Type
Online
Tender Overview
Organization
Tender ID
Competition Type
NCB
Bidding Type
Tender
Location / State
Tinsukia → Assam
EMD Exemption
Available
Quantity
Not Available
Website
Contact Person
Address
Project Description
Tender for Annual Rate Contract For Servicing And Overhauling Of Transformers At Aod Refinery, Digboi And Iocl Dr Township.
Corrigendum
| Sr No | Corrigendum Date | Corrigendum | Type | New Submission Date |
|---|---|---|---|---|
| 1 | 21-Sep-2026 | Date extension 2 | Date | 28-Sep-2026 |
| 2 | 14-Sep-2026 | Date extension | Date | 21-Sep-2026 |
BOQ
| Sl. No. | Item Description |
| 1 | Servicing of Transformers at AOD Digboi |
| 2 | Capital overhauling of Transformer at site (Detailed scope of work as given in technical specifications). |
| 3 | TR up to 1 MVA |
| 4 | TR above 1MVA & including 7.5MVA |
| 5 | TR above 7.5 MVA & including 12.5MVA |
| 6 | Servicing / Maintenance of Transformer at site for Power / Distribution Transformers up to 2500kVA and Autotransformers. Scope of work: a),,Opening of HT & LT terminal Box. b),,Taking of IR Value. c),,Cleaning of terminal Box including insulator, bus bar. d),,Checking of Tightness of connections. e),,Supply & Replacement of HT & LT Terminal Box cover gasket. f),,BDV Testing of oil sample (top & Bottom) g),,Complete Box up & submission of report to EIC. Note: Mobilisation of man power & testing equipments shall be in the scope of vendor. |
| 7 | Arresting of oil leakages wihout opening of Top cover (excluding cost of materail like HT/LT Bushing, metal parts) (Detailed scope of work as per technical specifications given). |
| 8 | TR up to 1 MVA |
| 9 | TR above 1MVA & including 7.5MVA |
| 10 | TR above 7.5 MVA & including 20MVA |
| 11 | Arresting of Oil leakages by opening of Top cover (excluding cost of materail like HT/LT bushing, metal parts) (Detailed scope of work as per technical specifications given). |
| 12 | TR up to 1 MVA |
| 13 | TR above 1MVA & including 2.5MVA |
| 14 | TR above 7.5 MVA & including 12.5MVA |
| 15 | Supply of silica gel for Transformer oil breather unit. Silica gel shall be of Blue color, mesh size 5-8, conforming to IS:3401 Rev-2. Silica gel must be supplied in sealed factory packed plastic / glass air tight bottles. The job involves removing the spent silica gel from transformers and repalcing with fresh stock of silica gel. Isolation if required shall be done by IOCL. Job complete in all respects with labour, tools and tackles and as per the instruction of E-I-C. |
| 16 | PAINTING OF TRANSFORMER Cleaning of surface, removing of rust and foreign matter, rubbing down thoroughly with emery paper, wire brush, washing with degreasing solvent (white spirit) to remove grease etc. and preparation of surface for application of enamel paint by spray painting on transformers and its accessories with one coat of ready mixed primer and two coats of approved quality synthetic enamel paint of make ASIAN PAINTS / BERGER / Jhonson of Paint shade No-631. The paint shall be suitable for temperature of 100 Deg.Cel. The job complete with labour and materials as per direction of the Engineer-in-Charge. |
| 17 | TR up to 1 MVA |
| 18 | TR above 1MVA & including 7.5MVA |
| 19 | TR above 7.5 MVA & including 20MVA |
| 20 | Removal of defective OTI. Supply, fitting, connection and commissioning of capillary type OTI (identical to the one which is to be replaced). Dial temperature indicator having independent micro switch for alarm & trip and separate 4-20 mA module. Job Complete in all respects with labour and materail and as per the direction of EIC. |
| 21 | Removal of defective WTI. Supply, fitting, connection and commissioning of capillary type WTI (identical to the one which is to be replaced). Dial temperature indicator having independent micro switch for alarm & trip and separate 4-20 mA module. Job Complete in all respects with labour and materials and as per the direction of EIC. |
| 22 | Removal of defectice Breather. Supply, fitting, connection and commissioing of Breather (upto 1kg). Job Complete in all respects with labour and materail and as per the direction of EIC. |
| 23 | Removal of defectice Breather. Supply, fitting, connection and commissioing of Breather (upto 2kg). Job Complete in all respects with labour and materail and as per the direction of EIC. |
| 24 | Removal of defective Buchholz relay. Supply, installation & commissioning of Buchholz relay (identical to the one which is to be replaced). Buchholz relay with Reed-switch shall be acceptable. Job completes in all respects with materials and labour and as per direction of EIC. |
| 25 | Supply, installation and commissioning of MOG, including dismantling of the damaged MOG. Job complete in all respets with labour and material and as per direction of EIC. |
| 26 | Supply of HT porcelain bushing without metal part. The Bushing should be identical to the existing Bushing which is to be replaced. The Bushing should be supplied as per the direction of EIC. |
| 27 | TR up to 1 MVA |
| 28 | TR above 1MVA & including 7.5MVA |
| 29 | TR above 7.5 MVA & including 20MVA |
| 30 | Supply of HT bushing metal part. The metal part should be identical to the existing one which is to be replaced. The metal part should be supplied with complete accessories and as per direction of EIC. |
| 31 | TR up to 1 MVA |
| 32 | TR above 1MVA & including 7.5MVA |
| 33 | TR above 7.5 MVA & including 20MVA |
| 34 | Supply of LT porcelain bushing without metal part. The Bushing should be identical to the existing Bushing which is to be replaced. The Bushing should be supplied as per the direction of EIC. |
| 35 | TR up to 1 MVA |
| 36 | TR above 1MVA & including 7.5MVA |
| 37 | Supply of LT Bushing metal part. The metal part should be identical to the existing one which is to be replaced. The metal part should be supplied with complete accessories and as per direction of EIC. |
| 38 | TR up to 1 MVA |
| 39 | TR above 1MVA & including 7.5MVA |
| 40 | FILTRATION OF TRANSFORMER OIL Filtration of transformer oil by stream line filter machine provided by the contractor for improving the insulation strength of oil to the required strength as per pacification given below (excluding the supply of oil. a) Filtration of transformer oil till desired bdv is attained as per is. b) Topping up of oil. c) Releasing all the air from air release plug & bucholz relay. d) To and fro transportation of filter machine and equipments. |
| 41 | PAINTING OF ELECTRICAL EQUIPMENTS Cleaning of surface, rust removing of foreign matter, rubbing down thoroughly with emery paper, wire brush, washing with degreasing solvent (white spirit) to remove grease etc. and preparation of surface for application of enamel paint by spray painting on bus ducts, transformers/motors or any other metallic surface with one coat of ready mixed primer and two coats of approved quality/APCOLITE ASIAN synthetic enamel paint including supply of paint suitable for a temperature of 100 Degree Celsius. All complete with labour and materials as per directions of the Engineer-in-Charge. |
| 42 | SUPPLY & INST. OF ELMEX TERMINALS Supply & installation of elmex terminals supply and fixing and connecting elmex type terminals wherever required. job includes drilling holes, providing and fixing clamps, nuts and bolts etc. suitable for terminating 2.5 mm2 copper conductor. job should be carried out as per drawing.( per terminal ) |
| 43 | DIN CHANNELS FOR ELMEX TERMINALS Supply and fixing and connecting channels for elmex type terminals wherever required. job includes drilling holes. providing and fixing clamps, nuts and bolts etc. |
| 44 | REPLACEMENT OF OLD TRANSFORMER OIL Replacement of the old oil from the transformer as per the specifications given below a) Old oil heating by hot oil circulator for 4 hrs. b) Draining out entire quantity of oil. c) Blanking of all opening for vaccum pulling. d) Applying vacuum pulling for 4 hrs minimum 600 hg mercury pressure. e) Filtration of new transformer oil for filling. f) Filling the oil under vacuum & filtration of oil till desired bdv is attained as per is. g) Releasing all the air from air release plug & bucholz relay h) Topping up of oil. i) To and fro transportation of filter machine and equipments. j) Transportation of old and new oil. |
| 45 | Supply / Supply & Installation of following accessories for transformers as per direction of Engineer-in-charge: |
| 46 | Supply & replacement of Oil temperature Indicator (OTI), mercury switch type, complete with capilary & sensor as per direction of EIC. Make shall be approved by EIC. Complete with supply & installation. |
| 47 | Supply & replacement of Buchholz relay as per direction of Engineer-in-Charge. |
| 48 | Supply, fixing, installation of Breather Unit without silicagel suitable for upto 750gm silicagel as per direction of Engineer-in-Charge. |
| 49 | Supply, fixing, installation of Breather Unit without silicagel suitable for upto 1000gm silicagel as per direction of Engineer-in-Charge. |
| 50 | Supply, fixing, installation of Breather Unit without silicagel suitable for upto 1500gm silicagel as per direction of Engineer-in-Charge. |
| 51 | Silica gel supplied shall be of orange color, mesh size 5-8, conforming to IS:3401 Rev-2. Silica gel must be non carcinogenic silica gel |
| 52 | TRANSPORTATION OF TRANSFORMER OIL Transportation of transformer oil anywhere within refinery premises in drums of 200 litres or more from Electrical Workshop/Store to site, pouring transformer oil in transformer tank and returning empty/ filled drums from site as given below to Electrical Workshop/ Stores etc. including supply of tractor & trailor with six labours, driver and fuel etc. required for loading, unloading & transportation of empty/filled transformer oil drums. All complete with labour and materials as per directions of the Engineer-in-Charge. |
| 53 | TRANSFORMER CLEANING Cleaning of transformer includes surface cleaning i.e. cleaning of accumulated sticky oil and other dust, oil fins. Job includes opening of LT duct & HT terminal box, cleaning of duct and terminal box, tightening of nuts & bolts wherever is required. Job to be completed with all men, materials and equipments like tools & tackles as per direction and satisfaction of the Engineer-in-Charge. All cleaning materials such as markin cloth, cotton waste etc. shall be supplied by the Contractor. |
| 54 | Generator 250 KVA |
| 55 | Hire and running charges of crane 20 ton |
| 56 | Hire charges of TATA 407 or equivalent for local shifting. Note :-1. Above hire-charges(from itemcode0001to 0083) include cost of services of operating staff,Cost of lubricating oil,diesel/Petrol/Keroseneoil,other consumables for run-ning the plant and machinery and all the taxes.2.The hire charges of plant machinery on per day basis are for single shift of eight working hours Please Enable Macros to View BoQ information |
AI Tender Summary
Tender Timeline
Sep 21, 2026
11:30 IST
Tender Published
Tender notice published.
Completed
Sep 28, 2026
18:00 IST
Corrigendum-1 Issued
Clarifications on tender conditions and amendments issued.
Today
Sep 21, 2026
18:00 IST
Corrigendum-2 Issued
Clarifications on tender conditions and amendments issued.
CompletedSep 28, 2026
17:00 IST
Bid Submission Deadline
Online submission via eProcurement portal.
TodaySep 29, 2026
Bid Opening Date
Technical bids will be opened and evaluated.
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