Tender For Award Of Central Rate Contract For Repair And Testing Of Damaged 33/11 Kv Power Transformer
Tender Overview
Project Description
Tender for Award Of Central Rate Contract For Repair And Testing Of Damaged 33/11 Kv Power Transformer , 1.0) Opening Of Transformer Cover, Draining Oil, De-Tanking Core Coil Assembly, Assessment And Estimation For Repair And Replacement Of Part,Providing Locking Arrangement On All Valves & Plugs As Per Requirement Of Specification,Cleaning & Washing Of Dust/ Rust & Dirt From All Other Parts Including Core Tanks & Cooling Tubes, Re-Tank , Variable With Base Date 01.03.2026 , 1.1) For 3.15 Mva Rating , 1.2) For 5.0 Mva Rating , 1.3) For 8.0 Mva Rating , 2.0) Supply Of Following Damaged Parts Requiring Replacement Complete In All Respect, Variable With Base Date 01.03.2026 , 2.1) Hv Leg Coil With Insulation, Varnish & Baking Of Coil Assembly (Vacuum Impregnation)(The Burn Leg Is To Be Retained By Contractor) , 2.2) Lv Leg Coil With Insulation, Varnish & Baking Of Coil Assembly (Vacuum Impregnation)(The Burn Leg Is To Be Retained By Contractor) , 3) Ht Bushing (33 Kv) As Per Relevant Iss. , 4) Lt Bushing (11 Kv) & Neutral Bushing As Per Relevant Iss. , 5) Bushing Rod & Other Metal Parts Including Nuts ( Material & Size Of Bushing/ Rods/Nuts As Per Is Specidfication) , 5.1) For Hv , 5.2) For Lv , 6.0) Set Of Gaskets (Rubberized Cork Neoprene Material & Size Is To Be Needed) , 6.1) For 3.15 Mva Rating , 6.2) For 5.0 Mva Rating , 6.3) For 8.0 Mva Rating , 7.0) Breather Dehydrator (Silicagel Type With Fresh Silicagel) , 7.1) For 3.15 Mva Rating , 7.2) For 5.0 Mva Rating , 7.3) For 8.0 Mva Rating , 8.0) Glass For Oil Level Gauge , 9) Taping Switch Handel Only , 9.1) For 3.15 Mva Rating , 9.2) For 5.0 Mva Rating , 9.3) For 8.0 Mva Rating , 10) Off Loading Taping Switch Without Handle , 10.1) For 3.15 Mva Rating , 10.2) For 5.0 Mva Rating , 10.3) For 8.0 Mva Rating , 11) Oil Drain/ Filter Valve Of Gun Metal , 12) Lt Terminal Plate With Terminals If Required , 13) Fresh Transformer Oil Of Standard Quality Of Isi Mark, Variable With Base Date 01.03.2026 , 14) Filtration Charges If Transformer Oil Supplied By The Nigam / Repairer Of The Transformer , 15) Sundry Items Viz Cover Bolts, Plug Cap Screws, Washers, Insulation Material Etc. With Minor Repairs Of Tank And Other Parts If Any (Denting And Welding Etc. If Required) , 15.1) For 3.15 Mva Rating , 15.2) For 5.0 Mva Rating , 15.3) For 8.0 Mva Rating , 16) Cooling Tubes/ Fins , 17) Conservative Tank With Detachable End Plates. , 18) Dial Type Thermometer 100 Mm Size , 19) Dial Type Thermometer 150 Mm Size With A Set Of Alarm Contact For 3.15 Mva And Above Transformer Rating. , 20) Double Float Buchholz Relay , 21) Rating Plate Made Of Stainless Steel Or Brass Or Alumunium Engraved With Details As Per Specification Including Date Of Despatch Of Transformer After Repair , 22) Earthing Terminals , 23) Air Release Valve , 24) Arcing Horns For Ht Bushing And Lt Bushing Non Adjustable Type , 25) Winding Temperature Indicator With Alarm , 26) Plain Capaliary Type Oil Level Guage To Be Provided On The Oil Conservator With Low Level Indicator , 27) Magnetic Type Oil Level Gauge , 28) Marshalling Box For Transformers , 29) Shut Off Valve (Gun Metal ) 1 1/2 , 30) Painting Inside With Two Coat Of Zinc Chromate Best Paint And Outside Of Transformer With Two Coat Of Grey Paint And Marking After Derusting , 30.1) For 3.15 Mva Rating , 30.2) For 5.0 Mva Rating , 30.3) For 8.0 Mva Rating , 31) To And Fro Transportation Charges From Any Of The Circle Store / Sub Store To The Work Of The Firm And Back , 31) A)Loading & Unloading Charges At Firms Works And Nigams Stores (Both Sides). , 31.A.1) For 3.15 Mva Rating , 31.A.2) For 5.0 Mva Rating , 31.A.3) For 8.0 Mva Rating , 31. B) Transportation Charges Per Km. , 31.B.1) For 3.15 Mva Rating , 31.B.2) For 5.0 Mva Rating , 31.B.3) For 8.0 Mva Rating , 32) Charges For Minor Repair Where Replacement Of Coil Is Not Involved , 32.1) For 3.15 Mva Rating , 32.2) For 5.0 Mva Rating , 32.3) For 8.0 Mva Rating , 33) Labour Charges For Opening The Transformer Tank Top Cover(If Required To Facilitate Maintenance Of Transformer) After Removing Required Accessories.Including All Required T&P Up To 5 Mva Transformer. , 34) Preventing Oil Leakage By Changing Main Gasket With Material After Removing Cover. , 34.1) Upto 1.6 Mva Transformer , 34.2) Above 1.6 Mva & Upto 3.15 Mva Transformer. , 34.3) Above 3.15 Mva & Upto 5 Mva Transformer. , 35) A) Change Of Hv/Lv Bushing Gasket Ring And Rubber Washers Including Supply Of Required Material & Draining /Re-Filling Of Oil As Required. , 35) B) For Additional Hv/Lv Bushing Work. * This Amount Will Not Be Payable Incase The Work Of Removing Of Top Cover Gasket Is Also Awarded In The Same Order. , 36) Change Of Gaskets Of Valves/Radiator / Buchhlozes Relay Including Cost Of Gaskets Etc. , 36.1) Valves/Buchhlozes Relay , 36.2) Radiator Valves. , 37) Providing & Fixing (Including Replacement) Of Hv/Lv Bushing Of Reputed Make & Bushing Rod Of Brass Matel Including Cost Of Gasket & Rubber Rings .Gasket Makes Are Tabross,Tiger, Zebra And Any Other Reputed Make. , 37.A) Hv Side , 37.A.1) Upto 1.6 Mva Transformer , 37.A.2) Above 1.6 Mva & Upto 3.15 Mva Transformer. , 37.A.3) Above 3.15 Mva & Upto 5 Mva Transformer. , 37.B) Lv Side , 37.B.1) Upto 1.6 Mva Transformer , 37.B.2) Above 1.6 Mva & Upto 3.15 Mva Transformer. , 37.B.3) Above 3.15 Mva & Upto 5 Mva Transformer. , 38) Dehydration/Filteration And Reconditioning Of Transformer Oil (Electricity Shall Be Supplied By Deptt.) As Per Norms And Testing Thereof In Presence Of Sub-Station Incharge. , 39) Cleaning Of Oil Scale Deposits Over The Body And Radiators Of Power Transformer With Thinner/Detergent And De-Rusting In Perfect Manner. , 39.1) Upto 1.6 Mva Transformer , 39.2) Above 1.6 Mva & Upto 3.15 Mva Transformer. , 39.3) Above 3.15 Mva & Upto 5 Mva Transformer. , 40) Change Of Following Items: , A) Oil Temperature Indicator , B) Windingtemperature Indicator , C) Silica Gel Container , D) Presser Relief Device Make Atbus , E) Magnetic Oil Level Gauge.Make Atbus , F) Gas Operated Buchhloz Relay( Double Floating Type Make Atbus)
Corrigendum
| Sr No | Corrigendum Date | Corrigendum | Type | New Submission Date |
|---|---|---|---|---|
| 1 | 29-Apr-2026 | Technical Corrigendum | Technical Bid | 14-May-2026 |
| 2 | 29-Apr-2026 | Due date extension TN-2111 | Date | 14-May-2026 |
| 3 | 02-Jun-2026 | Due date extension-3 TN-2111 | Date | 15-Jun-2026 |
| 4 | 14-May-2026 | Due date extension-2 TN-2111 | Date | 01-Jun-2026 |
| 5 | 29-Apr-2026 | Technical Corrigendum | Technical Bid | 15-Jun-2026 |
| 6 | 29-Apr-2026 | Due date extension TN-2111 | Date | 14-May-2026 |
| 7 | 29-Apr-2026 | Technical Corrigendum | Technical Bid | 01-Jun-2026 |
| 8 | 29-Apr-2026 | Due date extension TN-2111 | Date | 14-May-2026 |
| 9 | 14-May-2026 | Due date extension-2 TN-2111 | Date | 01-Jun-2026 |
| 10 | 02-Jun-2026 | Due date extension-3 TN-2111 | Date | 15-Jun-2026 |
| 11 | 14-May-2026 | Due date extension-2 TN-2111 | Date | 01-Jun-2026 |
| 12 | 29-Apr-2026 | Technical Corrigendum | Technical Bid | 22-Jun-2026 |
| 13 | 29-Apr-2026 | Due date extension TN-2111 | Date | 14-May-2026 |
| 14 | 16-Jun-2026 | due date extension 4 TN-2111 | Date | 22-Jun-2026 |
| 15 | 14-May-2026 | Due date extension-2 TN-2111 | Date | 01-Jun-2026 |
| 16 | 29-Apr-2026 | Technical Corrigendum | Technical Bid | 02-Jul-2026 |
| 17 | 29-Apr-2026 | Due date extension TN-2111 | Date | 14-May-2026 |
| 18 | 23-Jun-2026 | Due Date Extension-5 | Date | 02-Jul-2026 |
| 19 | 16-Jun-2026 | due date extension 4 TN-2111 | Date | 22-Jun-2026 |
| 20 | 02-Jun-2026 | Due date extension-3 TN-2111 | Date | 15-Jun-2026 |
BOQ
| Sl. No. | Item Description |
| 1 | 1.0) Opening of transformer cover, draining oil, de-tanking core coil assembly, Assessment and estimation for Repair and replacement of part,providing locking arrangement on all valves & plugs as per requirement of specification,Cleaning & washing of dust/ rust & dirt from all other parts including core tanks & cooling tubes, re-tank , variable with base date 01.03.2026 |
| 2 | 1.1) For 3.15 MVA Rating |
| 3 | 1.2) For 5.0 MVA Rating |
| 4 | 1.3) For 8.0 MVA Rating |
| 5 | 2.0) SUPPLY OF FOLLOWING DAMAGED PARTS REQUIRING REPLACEMENT COMPLETE IN ALL RESPECT, variable with base date 01.03.2026 |
| 6 | 2.1) HV Leg Coil with insulation, varnish & baking of coil assembly (Vacuum impregnation)(the burn leg is to be retained by contractor) |
| 7 | 2.2) LV Leg Coil with insulation, varnish & baking of coil assembly (Vacuum impregnation)(the burn leg is to be retained by contractor) |
| 8 | 3) HT bushing (33 KV) as per relevant ISS. |
| 9 | 4) LT bushing (11 KV) & Neutral bushing as per relevant ISS. |
| 10 | 5) Bushing rod & other metal parts including nuts ( material & size of bushing/ rods/nuts as per IS Specidfication) |
| 11 | 5.1) For HV |
| 12 | 5.2) For LV |
| 13 | 6.0) Set of Gaskets (rubberized cork neoprene material & size is to be needed) |
| 14 | 6.1) For 3.15 MVA Rating |
| 15 | 6.2) For 5.0 MVA Rating |
| 16 | 6.3) For 8.0 MVA Rating |
| 17 | 7.0) Breather Dehydrator (Silicagel type with fresh silicagel) |
| 18 | 7.1) For 3.15 MVA Rating |
| 19 | 7.2) For 5.0 MVA Rating |
| 20 | 7.3) For 8.0 MVA Rating |
| 21 | 8.0) Glass for oil level gauge |
| 22 | 9) Taping switch handel only |
| 23 | 9.1) For 3.15 MVA Rating |
| 24 | 9.2) For 5.0 MVA Rating |
| 25 | 9.3) For 8.0 MVA Rating |
| 26 | 10) Off loading Taping switch without handle |
| 27 | 10.1) For 3.15 MVA Rating |
| 28 | 10.2) For 5.0 MVA Rating |
| 29 | 10.3) For 8.0 MVA Rating |
| 30 | 11) Oil drain/ filter valve of gun metal |
| 31 | 12) LT Terminal plate with terminals if required |
| 32 | 13) Fresh transformer oil of standard quality of ISI mark, variable with base date 01.03.2026 |
| 33 | 14) Filtration charges if Transformer oil supplied by the Nigam / Repairer of the Transformer |
| 34 | 15) Sundry items viz cover bolts, plug cap screws, washers, insulation material etc. with minor repairs of tank and other parts if any (Denting and welding etc. if required) |
| 35 | 15.1) For 3.15 MVA Rating |
| 36 | 15.2) For 5.0 MVA Rating |
| 37 | 15.3) For 8.0 MVA Rating |
| 38 | 16) Cooling Tubes/ Fins |
| 39 | 17) Conservative Tank with detachable end plates. |
| 40 | 18) Dial type thermometer 100 mm size |
| 41 | 19) Dial type thermometer 150 mm size with a set of alarm contact for 3.15 MVA and above transformer rating. |
| 42 | 20) Double float buchholz relay |
| 43 | 21) Rating plate made of stainless steel or brass or alumunium engraved with details as per specification including date of despatch of transformer after repair |
| 44 | 22) Earthing Terminals |
| 45 | 23) Air release valve |
| 46 | 24) Arcing horns for HT bushing and LT bushing non adjustable type |
| 47 | 25) Winding Temperature indicator with alarm |
| 48 | 26) Plain Capaliary type oil level guage to be provided on the oil conservator with low level indicator |
| 49 | 27) Magnetic type oil level gauge |
| 50 | 28) Marshalling box for transformers |
| 51 | 29) shut off valve (Gun metal ) 1 1/2\\" |
| 52 | 30) Painting inside with two coat of Zinc chromate best paint and outside of transformer with two coat of grey paint and marking after derusting |
| 53 | 30.1) For 3.15 MVA Rating |
| 54 | 30.2) For 5.0 MVA Rating |
| 55 | 30.3) For 8.0 MVA Rating |
| 56 | 31) To and Fro transportation charges from any of the circle store / Sub store to the work of the firm and back |
| 57 | 31) a)Loading & unloading charges at firm's works and Nigam's stores (Both Sides). |
| 58 | 31.a.1) For 3.15 MVA Rating |
| 59 | 31.a.2) For 5.0 MVA Rating |
| 60 | 31.a.3) For 8.0 MVA Rating |
| 61 | 31. b) Transportation charges Per Km. |
| 62 | 31.b.1) For 3.15 MVA Rating |
| 63 | 31.b.2) For 5.0 MVA Rating |
| 64 | 31.b.3) For 8.0 MVA Rating |
| 65 | 32) Charges for minor repair where replacement of coil is not involved |
| 66 | 32.1) For 3.15 MVA Rating |
| 67 | 32.2) For 5.0 MVA Rating |
| 68 | 32.3) For 8.0 MVA Rating |
| 69 | 33) Labour charges for opening the transformer tank top cover(if required to facilitate maintenance of transformer) after removing required accessories.Including all required T&P Up to 5 MVA transformer. |
| 70 | 34) Preventing oil leakage by changing main gasket with material after removing cover. |
| 71 | 34.1) Upto 1.6 MVA transformer |
| 72 | 34.2) Above 1.6 MVA & upto 3.15 MVA transformer. |
| 73 | 34.3) Above 3.15 MVA & upto 5 MVA transformer. |
| 74 | 35) A) Change of HV/LV bushing gasket ring and rubber washers including supply of required material & draining /re-filling of oil as required. |
| 75 | 35) B) For additional HV/LV bushing work.* This amount will not be payable incase the work of removing of Top cover gasket is also awarded in the same order. |
| 76 | 36) Change of gaskets of valves/radiator / Buchhloze's Relay including cost of gaskets etc. |
| 77 | 36.1) Valve's/Buchhloze's Relay |
| 78 | 36.2) Radiator Valves. |
| 79 | 37) Providing & Fixing (including replacement) of HV/LV bushing of reputed make & bushing rod of brass matel including cost of gasket & rubber rings .Gasket makes are TABROSS,TIGER, ZEBRA and any other reputed make. |
| 80 | 37.A) HV Side |
| 81 | 37.A.1) Upto 1.6 MVA transformer |
| 82 | 37.A.2) Above 1.6 MVA & upto 3.15 MVA transformer. |
| 83 | 37.A.3) Above 3.15 MVA & upto 5 MVA transformer. |
| 84 | 37.B) LV Side |
| 85 | 37.B.1) Upto 1.6 MVA transformer |
| 86 | 37.B.2) Above 1.6 MVA & upto 3.15 MVA transformer. |
| 87 | 37.B.3) Above 3.15 MVA & upto 5 MVA transformer. |
| 88 | 38) Dehydration/Filteration and reconditioning of transformer oil (electricity shall be supplied by deptt.) as per norms and testing thereof in presence of sub-station Incharge. |
| 89 | 39) Cleaning of oil scale deposits over the body and radiators of power transformer with thinner/detergent and de-rusting in perfect manner. |
| 90 | 39.1) Upto 1.6 MVA transformer |
| 91 | 39.2) Above 1.6 MVA & upto 3.15 MVA transformer. |
| 92 | 39.3) Above 3.15 MVA & upto 5 MVA transformer. |
| 93 | 40) Change of following items: |
| 94 | a) Oil temperature indicator |
| 95 | b) WindingTemperature indicator |
| 96 | c) Silica gel container |
| 97 | d) Presser relief device Make ATBUS |
| 98 | e) Magnetic oil level gauge.Make ATBUS |
| 99 | f) Gas operated Buchhloz relay( Double floating type make ATBUS) Please Enable Macros to View BoQ information |
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