Tender for Overhauling and Oil Filtration of 15 MVA Transformers at Wanakbori TPS

This government tender invites qualified contractors to undertake the complete overhauling, oil filtration, and testing of 15 MVA, 15.75/6.6 KV Unit Auxiliary Transformers at Wanakbori Thermal Power Station. The project includes attending to oil leakages, valve repairs, and pipe joints, ensuring optimal transformer performance. The tender aims to select experienced firms with proven expertise in power transformer maintenance and overhaul. The project duration is 24 months, with a total estimated cost of approximately INR 1,914,876.12. Interested bidders must submit their proposals by June 17, 2025, with bid opening scheduled for June 18, 2025. This opportunity is ideal for electrical maintenance companies, power sector contractors, and specialized transformer service providers seeking government contracts in Gujarat. The tender process emphasizes compliance with technical, financial, and eligibility criteria, ensuring transparency and quality standards in power infrastructure maintenance.

• Conduct a thorough overhauling of the 15 MVA, 15.75/6.6 KV Unit Auxiliary Transformers at Wanakbori TPS.
• Perform oil filtration and replace or repair oil leakages.
• Attend to oil leakages of transformers, tap changers, valves, pipes, and joints.
• Conduct pre- and post-testing of transformers to ensure operational efficiency.
• Replace faulty components and ensure all safety and operational standards are met.
• Maintain detailed documentation of all work performed.

The process includes:

1. Site inspection and assessment.
2. Removal of transformer components.
3. Oil filtration and leakage repairs.
4. Replacement of damaged parts.
5. Testing and quality assurance.
6. Final commissioning and documentation.

Key Deliverables	Specifications
Oil Filtration	High-quality filtration equipment
Leakage Repairs	Sealing of all leak points
Testing Reports	Pre- and post-overhaul testing results
Safety Compliance	Adherence to safety standards

**Important Requirements:** - Use of approved transformer oils. - Compliance with safety and environmental regulations. - Submission of detailed work plan and timeline. - Availability of skilled technical personnel.

This scope ensures the transformers operate efficiently, reducing downtime and extending service life.

✓ Must have valid registration and licensing for electrical works.
✓ Experience in power transformer overhauling and maintenance.
✓ Proven track record with at least 3 similar projects completed in the past 5 years.
✓ Financial stability with minimum turnover of INR 50 lakhs annually for the last 3 years.
✓ Must possess valid GST registration, PAN, and I.T. certificates.

Qualification Criteria	Minimum Requirement
Experience in similar work	3 projects in last 5 years
Financial Turnover	INR 50 lakhs/year
Certification	Electrical contractor license, GST, PAN
Technical Personnel	Qualified electrical engineers and technicians

**Note:** Bidders must submit all relevant documents as proof of eligibility during the technical evaluation stage.

Parameter	Specification
Transformer Capacity	15 MVA
Voltage Rating	15.75/6.6 KV
Oil Filtration	High-efficiency filtration units
Leakage Repair	Sealing materials compliant with standards
Testing Standards	IEC 60076 or equivalent

**Procedures:** - Inspection and assessment. - Disassembly of transformer components. - Oil filtration and leakage sealing. - Replacement of damaged parts. - Final testing and commissioning.

All work must comply with applicable safety and environmental regulations, ensuring minimal disruption to power supply and adherence to quality standards.

The estimated project cost is INR 1,914,876.12, with a bid security of INR 57,446.00 (EMD). The financial proposal should include detailed cost breakdowns for labor, materials, equipment, and overheads. Payment terms are linked to project milestones, with payments released upon completion of each phase. Bidders must submit a valid bank guarantee or EMD as per tender guidelines. The total bid value should not exceed the estimated cost, and all financial documents must be duly certified. The tender fee of INR 1770 is non-refundable and payable online. The financial proposal must be submitted in the prescribed format, ensuring transparency and competitiveness.

1. Download and review tender documents from the official portal.
2. Submit the tender fee and EMD before the deadline.
3. Attend the pre-bid meeting if scheduled.
4. Prepare and submit the technical bid along with all required documents by June 17, 2025, 18:00.
5. Technical evaluation will be conducted on June 18, 2025, at 15:30.
6. Shortlisted bidders will be invited for commercial bid opening.
7. Final evaluation and award notification will follow.

Step	Description	Deadline
1	Bid submission	June 17, 2025, 18:00
2	Technical evaluation	June 18, 2025, 15:30
3	Commercial bid opening	Post technical evaluation
4	Contract award	As per evaluation outcome

**Note:** All bids must be submitted electronically through the official portal. Late submissions will be rejected.

Bids will be evaluated based on the following criteria:

Criteria	Weightage
Technical competence and experience	50%
Financial proposal	30%
Compliance with eligibility and technical specifications	20%

**Minimum Thresholds:** - Technical score must be at least 70%. - Financial bids will be scored inversely proportional to bid amount. - Only bidders meeting all eligibility criteria will be considered.

Evaluation factors include past project success, adherence to technical specifications, financial stability, and bid competitiveness. The highest scoring bidder will be awarded the contract.

Date	Event	Details
16-05-2025	Bid Submission Start	Bidders can start submitting bids online
17-06-2025	Bid Submission End	Last date for bid submission at 18:00
18-06-2025	Technical Evaluation	Scheduled at 15:30, evaluation of technical bids
18-06-2025	Preliminary Evaluation	Completion of technical assessment
17-06-2025	Document Download End	Last date for downloading tender documents

**Critical Dates:** - Bid submission deadline: June 17, 2025, 18:00 - Technical evaluation date: June 18, 2025, 15:30

For queries and clarifications, bidders can contact:

• Name: Chief Engineer [C & O], Wanakbori TPS
• Email: wtps.se-tech@gebmail.com
• Phone: 7069003830
• Address: Wanakbori Thermal Power Station, Gujarat State Electricity Corporation Limited, Ta: Galteshwar, Dist: Kheda - 388239

Support for online bidding and document download is available through (n)code solutions at GNFC Ltd., Ahmedabad. Contact support team at +91-79-40007517 or via email at nprocure@ncode.in.

All bidders are encouraged to participate in the vendor training sessions organized every Saturday from 4:00 to 5:00 P.M. at (n)code solutions, GNFC Ltd., Ahmedabad. This training provides guidance on bid preparation, submission procedures, and technical compliance. Bidders must ensure their technical and financial documents are complete and accurate to avoid disqualification. The tender process emphasizes transparency, fairness, and adherence to all specified terms and conditions. Bidders should review the detailed tender documents available online for comprehensive instructions and requirements.