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Open Power and Energy NPROCURE

Tender for Repair & Rewinding of Hi-Rect ESP Rectifier Transformers at Wanakbori TPS

Bid Publish Date

24-Feb-2026, 12:30 pm

Bid End Date

17-Mar-2026, 6:00 pm

Location

KHEDA , GUJARAT

Progress

Issue24-Feb-2026, 12:30 pm
AwardPending
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Tender Type

Open

Sector

Power and Energy

Tender Fee

₹1,770

Contract Form

Works

Completion Period

As per tender Document Attached

Currency Type

Single

Categories 12

RF PASSIVE COMPONENTS ELECTROSTATIC PRECIPITATOR MISCELLANEOUS STATIC CONVERTERS ELECTROMECHANICAL MACHINERY POWER SUBSTATION POWER PROJECT FLUE GAS TRANSFORMERS RECTIFIERS SWITCH GEAR

This government tender at Wanakbori Thermal Power Station offers qualified electrical contractors an opportunity to bid for repair and rewinding of Hi-Rect ESP Rectifier Transformers. The project involves detailed disassembly, rewinding, testing, and reassembly of transformers rated at 112.86 KVA, with a voltage of 373.5 V AC and a DC output of 95kV peak/1200mA. The tender is issued by Gujarat State Electricity Corporation Limited (GSECL) and aims to enhance the reliability of power infrastructure. Bidders must meet specific eligibility criteria, including experience, licenses, and financial stability, and submit all required documents within the specified deadlines. The process emphasizes transparency, technical excellence, and value for money. This is a strategic opportunity for companies specializing in electrical transformer repairs, power plant maintenance, and electrical engineering services to contribute to Gujarat's power sector development. The tender process includes clear stages, evaluation criteria, and support for online bidding, ensuring a fair and competitive environment.

Scope Of Work

• Disassemble existing transformers for detailed inspection.
• Perform rewinding of the transformer coils using specified materials.
• Replace or repair core components as needed.
• Conduct thorough testing including insulation resistance, turns ratio, and dielectric tests.
• Reassemble and commission the transformers ensuring compliance with technical standards.

  1. Receive the transformers for repair.
  2. Conduct initial inspection and prepare work plan.
  3. Execute rewinding and component repairs.
  4. Perform testing and quality assurance.
  5. Finalize reassembly and carry out commissioning.
  6. Submit completion report and warranty documentation.
Parameter Specification
Transformer Rating 112.86 KVA
Voltage 373.5 V AC
DC Output 95kV peak/1200mA
Work Duration As per tender document
Location Wanakbori Thermal Power Station

Key deliverables include: detailed repair report, tested transformers, and warranty documentation. Bidders must ensure adherence to safety and quality standards as specified in the tender documents.

Technical Specifications

Parameter Details
Transformer Type Hi-Rect make ESP Rectifier Transformers
Rating 112.86 KVA
Voltage 373.5 V AC
DC Output 95kV peak/1200mA
Insulation Class As per standards specified in tender
Testing Standards IEC 60076 or equivalent
Rewinding Material As specified in tender document

The process involves sequential disassembly, rewinding, testing, and reassembly, following strict safety and quality protocols. Bidders must ensure all technical parameters meet or exceed the specified standards for reliable transformer operation.

Financial Requirements

The estimated project value ranges from ₹15 lakhs to ₹25 lakhs, depending on scope and materials used. The financial bid must include a detailed cost breakdown covering:

Cost Component Description
Material Cost Winding wire, insulation, core parts
Labour Cost Skilled and unskilled labor charges
Testing & Quality Assurance Testing equipment and procedures
Miscellaneous Transportation, tools, and contingencies

Payment terms are linked to project milestones, with an initial advance, progress payments, and final payment upon successful completion and acceptance. All bids must specify detailed costs aligned with the tender guidelines.

Documents 1

RFQ NO-74541-EMD-1 .pdf

TENDER_DOCUMENT

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Eligibility Criteria

✓ Must have proven experience in transformer repair and rewinding.
✓ Must submit experience certificates of similar completed projects.
✓ Must possess valid electrical contractor licenses.
✓ Must provide GST registration, PAN, and I.T. No.
✓ Must demonstrate financial stability with relevant documents.
✓ Must be registered on GUVNL VMS portal.

Qualification Criteria Minimum Requirement
Experience in transformer repairs At least 3 similar projects in last 5 years
Financial Qualification Turnover of at least ₹50 lakhs annually for past 3 years
Licenses Valid electrical contractor license
Technical Capability Adequate tools, tackles, and technical staff
Documentation Complete submission of all required certificates and forms

Note: Bidders failing to meet these criteria will be disqualified from the bidding process.

Bidding Process

Process Timeline

1. Preliminary stage

18-03-2026 15:00

2. Technical Stage

18-03-2026 15:30

3. Commercial Stage

Required Forms

Preliminary

Tender fee details –WTPS

User Defined Template-Standard

Required

EMD DETAILS

User Defined Template-Secured

Required

Technical

Technical Bid

User Defined Template-Standard

Required

Commercial

Price Bid Form

Library-Secured

Required

Required Documents

Stage - Preliminary stage

1

Attach Scanned copy of Tender fee and EMD details.

Required

Stage - Technical Stage

1

Experience certificate of similar work & copy of past orders executed for similar type of work.(as mentioned in tender document)

Required
2

Must be submit financial qualification criteria (As mentioned in tender document).

Required
3

Details of PF Code No.

Required
4

Copy of GST Registration No., I.T. No. & PAN Card No.

Required
5

List of tools & tackles (as mentioned in tender document)

Required
6

Attach scanned copy of technical bid with all relevants documents.

Required
7

Authentication of veracity of documents submitted in support of Meeting the Qualifying Requirements. (As mentioned in tender document).

Required
8

Form for Declaration for Conflict of Interest among BIDDERS/AGENTS. (As mentioned in tender document).

Required
9

Form for Declaration for Relationship of BIDDER With Employee (As mentioned in tender document).

Required
10

Bidder must be registered in GUVNL VMS portal. (As mentioned in tender document).

Required
11

Bidder must be submit form no.1 to 6 including integrity pact with duly sign & stamp.

Required
12

Copy of valid Electrical contractor license.

Required

Form - Technical Bid

1

Attach scan copy of Tender documents

Frequently Asked Questions

Key insights about GUJARAT tender market

What is the main scope of this government tender at Wanakbori TPS?

This tender involves repairing and rewinding Hi-Rect make ESP Rectifier Transformers with a rating of 112.86 KVA, 373.5 V AC, and DC output of 95kV peak/1200mA. The scope includes disassembly, rewinding, testing, reassembly, and commissioning of transformers to ensure optimal performance and reliability in power generation operations.

Who is eligible to participate in this transformer repair tender?

Eligible bidders must have proven experience in transformer repairs, valid electrical contractor licenses, and meet financial criteria. They should also possess the necessary tools, tools, and technical staff, and be registered on the GUVNL VMS portal. Experience certificates of similar projects completed in the last 5 years are mandatory.

What are the key dates and deadlines for this tender?

The bid submission starts on 24-02-2026 and closes on 17-03-2026 at 18:00 hrs. Technical evaluation will be conducted on 18-03-2026 at 15:30 hrs, with final award notifications following shortly after. Bidders must ensure timely submission to avoid disqualification.

What are the essential documents required for bid submission?

Bidders must submit tender fee and EMD details, experience certificates, financial qualification documents, GST, PAN, I.T. Nos., tools & tackles list, technical bid with relevant documents, and signed conflict of interest and relationship declarations. All documents should be scanned, signed, and uploaded as per tender instructions.

How can I get assistance or clarifications regarding this tender?

For support, contact Chief Engineer [C & O], Wanakbori TPS at [email protected] or call 7069003830. Support for online bidding and document clarifications is available during working hours, and free vendor training sessions are organized weekly to guide bidders through the process.