SOW-0003 Refurbish Transformers_603-24-106.pdf

Statement of Work 603-24-106

Refurbish Transformers and Tri-annual Switchgear Corrections VA Medical Center

800 Zorn Ave Louisville KY 40206-1433

Background

Robley Rex Medical Center completed a tri-annual gear maintenance in December of 2022 with several noted discrepancies. The objective of this work is to correct the following noted discrepancies:

• Perform recommended testing for deteriorated transformers.

• Transformer #1 primary cables are not properly terminated to seal entrance from moisture.

• Transformer #1C, Transformer #2, Transformer #4 and Transformer #19 are low on oil.

• Transformer #4 primary bushing wells need end caps.

• Circuit 6/10 Selector Switch, T-19 Primary Switch, PNL 3XA and PNL 4XB maintenance and testing not completed.

• Breakers for BLDG 6 FDR 3, BLDG 6 FDR 4 tested out of tolerance on contact resistance.

Performance

The vendor shall complete the following task per the task requirements as outlined below.

Task 1 – Substation Breaker 3 Work

Location Requirement

102-21 Pull oil sample from existing sample port on Transform 21A and conduct analysis.

Repair oil leak from Transform 21A as follows:

1. Open, inspect and tighten bushings as they are the suspected source of leak.

2. Report any additional needed corrective action.

3. Fill level to normal level if leak is stopped..

Task 2 – Substation Breaker 9 Work

Location Requirement

102-21 Pull oil sample from existing sample port on Transform 21B and conduct analysis.

Task 3 – Substation Breaker 4 Work

EXT T20 Pull oil sample from Transform T2 and conduct analysis.

Install oil sample port on T2.

Add matching oil to Transformer T2 (up to 10 gallons) to correct level as necessary.

EXT BLDG 7 Pull oil sample from Transform T7 and conduct analysis.

Install oil sample port on T7.

Task 4 – Substation Breaker 5 Work

EXT BLDG 5 Pull oil sample from Transform T12 and conduct analysis.

Install oil sample port on Transform T12.

EXT BLDG 4 Pull oil sample from Transform T4 and conduct analysis.

Install oil sample port on Transform T4

Install or replace primary bushing well end caps on Transformer T4

Add matching oil to Transformer T4 (up to 10 gallons) to correct level as necessary.

EXT BLDG 1 Pull oil sample from Transform T1 and conduct analysis.

Install oil sample port on Transform T1.

Repair Transformer T1 primary cable termination by adding compression pin to seal out moisture.

BLDG 3/4 Test panel 3XA and panel 4XA 3B and panel 4-M.

Task 5 – Substation Breaker 6 & 10 Work

SB-2 Pull oil sample from Transform 1A and conduct analysis.

Pull oil sample from Transform 1B and conduct analysis.

B-013-1 Pull oil sample from Transform 1D and conduct analysis.

002-19 Pull oil sample from Transform T19 and conduct analysis.

Install oil sample port on Transform T19

Add matching oil to Transformer T19 (up to 10 gallons) to correct level as necessary.

101-6 Perform dry type transformer deenergized annual maintenance on Transformer T6A. T6.

Perform dry type transformer deenergized annual maintenance on Transformer T6B.

Replace Feeder Breaker 3 servicing Panel “C” on building 6 switch gear (BLDG 6 FDR 3)

Replace Feeder Breaker 4 servicing Panel “AA” on building 6 switch gear (BLDG 6 FDR 4)

002-19 Perform testing on 6/10 selector switch servicing T19

B-013 Perform testing on 6/10 selector switch servicing T1D

Task Requirements

All identified tasks shall be completed as follows:

Oil Analysis

The vendor shall sample insulating oil as identified by task requirements in accordance with ASTM D-923 standards. Samples from both transformers and automatic load tap changers shall be laboratory tested for:

1. dielectric strength

2. acid neutralization number

3. interfacial tension

4. color

5. power factor (Dielectric dissipation factor)

6. PPM water

7. Dissolved Gas Analysis

All test results shall be documented in a written report.

Oil sample port installation

To facilitate future sampling without de-energizing transformers, external sample ports are to be installed. In the performance of oil sample port installation, the vendor shall:

• Install sample ports with lockable valves or have restrictive access to prevent unauthorized use. A cabinet may be used to meet this requirement.

• Install a pressure vacuum gauge in a manner that supports safe sampling.

• Evaluate the installation of each sample port and gauge for the appropriate materials and location as to prevent premature failure or transformer damage.

• Install any additional components to ensure a safe and secure installation of the sample port and gauge.

Electrical Testing

In performance of testing as it relates to the task, the vendor shall reference the applicable table of NFPA 70B for each component being serviced. The testing shall be done to meet the 36-month requirements and include the aspects of:

• Visual inspection

• Cleaning

• Lubrication

• Electrical testing

• Mechanical Servicing

These requirements are outlined in NFPA 70B in detail and NFPA 70B shall be referenced as a guide to completing the testing. The vendor shall prepare a report detailing the findings of the testing.

Dry Type Transformer Maintenance

In the performance of annual maintenance on dry type transformers, the vendor shall reference the annual requirements of NFPA 70B to include:

• Removal dirt and dust. Either by use of vacuum or dry compressed air less than 25 psig.

• Perform a visual inspection.

• Check tight or tighten accessible hardware.

• Observe operational conditions.

The vendor shall prepare a report detailing the findings of the maintenance as performed above.

Scheduling

Due to the nature of operations at the medical facility, work that requires a power outage will not be performed during the hours of 0600 to 1900, Monday through Friday. All outages and testing are to be coordinated and scheduled with Engineering Services. Additionally, only one 13.8kV breaker will be deenergized at a time during outages. The only exception being the 6/10 selector switch testing which will be coordinated to minimize the duration that both breakers are open/off. The vendor shall propose a work schedule that meets the noted requirements within two weeks of contract award. VA shall indicate approval or disapproval of schedule within five (5) workdays. The VA will need at least 30 days advance notice of start date to coordinate outages.

All work shall be completed with 180 days from notice to proceed.

Deliverables

The vendor shall prepare and deliver the following reports:

• Oils sample report detailing the oil analysis results with a summary of results and suggested action if applicable of each transformer.

• A Testing or Maintenance report for each component (panel, switch, etc.) detailing what was found during visual inspection, electrical testing and/or any other pertinent information that would indicate the condition of the component. The report should include a summary with suggested actions if applicable.

Period of Performance

Work will need to be conducted during middle of spring to middle of fall. Requesting award date of no later than 2/28/2024 in order to acquisition parts for transformer replacement in the middle to late spring. Project will be completed no later than 9/30/2024.

Engineering Contacts and Distribution

Schedule proposals, reports, and other documents will be distributed to the following personnel:

Chief of Engineering John Denny John.Denny@va.gov (502)-287-6127 Assistant Chief of Engineering

David O’Brien david.obrien3@va.gov (502)-287-6095

Energy Engineer Jon Bloom jon.bloom@va.gov (502)-287-5509 Program Analyst Elise Lapierre elise.lapierre@va.gov (502)-287-5394 Maintenance Leader Darraill Gaines darraill.gaines@va.gov (502)-287-5421

Vendor Qualifications

All testing shall be by an independent vendor who is engaged in electrical testing as a major portion of his/her business. The vendor shall have field personnel who have successfully demonstrated their knowledge and experience with electrical power distribution systems high, medium, and low voltage testing. The vendor shall be capable of:

• Testing, assessing, evaluating, servicing, and reconditioning components.

• Assuring that the equipment on which work has been performed is safe, reliable, and acceptable for its intended purpose.

• Identifying defective equipment and potential safety problems, environmental hazards, or code violations.

• Providing a minimum of five (5) years of experience on similar major testing projects.

Instrumentation

The vendor shall only use test equipment and instruments that are within calibration and good operational condition. The vendor shall have a calibration program which conforms to industry quality standards. Dated calibration labels shall be visible on all test equipment. If a calibration label isn’t present, calibration documents will be made available. Calibration documents must specify the applicable equipment as proof of calibration.

Security

Security Clearance must be coordinated with the COR.

No smoking or use of tobacco products within any VA Buildings or on campus grounds.

Workmen are subject to rules of the medical center applicable to their conduct including parking and traffic regulations, accident reporting, hot work policy, and environmental policy.

mailto:John.Denny@va.gov mailto:david.obrien3@va.gov mailto:jon.bloom@va.gov mailto:elise.lapierre@va.gov mailto:darraill.gaines@va.gov