Testing_&_Repair_Services_of_Transformers_at_the_HFC_AWTP_-_Tech_Specs.pdf

TECHNICAL SPECIFICATIONS FOR

TESTING AND REPAIR SERVICES OF TRANSFORMERS AT THE HOWARD F. CURREN AWT PLANT

(SHELTERED MARKET SOLICITATION)

9. GENERAL

The City of Tampa, Wastewater Department, Howard F. Curren AWT Plant requires the annual testing, preventive maintenance and repair services of 54 distribution transformers. This work includes all laboratory testing, reporting, repairs, power factor testing and associated services. Testing performed as a result of this specification shall be non-destructive.

All testing shall meet or exceed the requirements of ANSI Standards Testing Section C57.10.00 and C57.12.90. The repairs to be performed are to rectify the problems identified by the inspection and testing. The repairs shall meet or exceed the requirements of the National Electrical Code and standards that are considered good electrical maintenance practice. All labor, equipment, devices, parts and materials necessary to perform the work shall be included whether or not directly specified herein. All 54 transformers located at the sites shall be tested. A list of the transformers is included in Section 6 of the Technical Specifications. Any manufacturers, model numbers, or serial numbers found to be incorrect on the list of transformers shall be noted on reports and correct information provided. Additionally, a map detailing the locations of the fifty-four transformers installed at the Howard F. Curren AWT Plant is included as an attachment 1 to this bid document (1 page).

10. SUBMITTALS

All bidders shall submit with their bid documentation that demonstrates the capability of performing work pertinent to this specification. Such information shall include the following items:

10.1 References from five current or former clients, within the last three years, showing the successful completion of similar testing. These references shall be complete with telephone numbers, email addresses, and contact person(s).

10.2 Certification of the laboratory that is to be used in the execution of this work. This certification shall be current and verifiable.

10.3 A list of test equipment to be used in the completion of the work. The calibration dates for this equipment shall be current when used during the testing.

Failure to submit shall documentation may result in the Bidder being deemed non-responsive.

11. SPECIFIC PROVISIONS

The following services shall be provided by the Awardee:

11.1 An oil sample shall be taken from each transformer using a glass sample syringe. The sample shall be handled carefully and protected from direct sunlight. The level of oil in the transformer shall be measured and filled to the proper level if needed. Ensure that only oil of identical type is used to top-up transformers. Nitrogen shall be added when necessary to maintain one to three pounds per square inch of positive pressure. This oil sample shall be analyzed for dielectric breakdown, neutralization number, power factor, fire and flash points, pour points, viscosity, moisture, interfacial tension, visual and color, specific gravity, dissolved gases and oxygen inhibitor.

11.2 If the oil sample test shows that the oxygen inhibitor level has fallen to 0.1%, sufficient DBPC should be added to the oil to provide a final inhibitor level of 0.3% by weight.

11.3 All cabinets, insulators and bushings shall be cleaned prior to testing. All spider webs, dirt and other debris shall be removed during this cleaning. To avoid dust clouds, a vacuum should be first be used to remove excess dirt. Low pressure (20 to 25 pounds per square inch) dry compressed air may be used for cleaning after most dirt has been removed by vacuum.

11.4 All accessories shall be inspected, tested and/or replaced. These accessories include but are not limited to: load tap changers, gauges, valves, gaskets, radiators, bushings, mechanical relief devices, fault pressure relays and other accessories. Minor adjustments, such as tightening of connections, shall be performed during this inspection. The

City will compensate the Awardee for any items that need to be replaced at the Awardee’s cost plus the mark-up percentage included on the Bid Response Page.

11.5 The Awardee shall perform a winding resistance test. All windings shall be tested and the results recorded.

11.6 An insulation resistance test shall be performed. All electrical points shall be measured to ground as well as the resistance from the primary coil to the secondary coils. The results of this testing shall be recorded.

11.7 A power factor test shall be performed and the results shall be calculated and recorded.

11.8 The Awardee shall perform a turn-to-turn ratio test on all the taps of the transformer being tested; the in-use tap shall be the last tap tested. This test shall include readings over five taps. The results of this testing shall be recorded for all five taps. An excitation current test shall be performed. Do not attempt to conduct test immediately following DC Testing. The results of this test shall be recorded.

11.9 The repairs shall be performed on a time and material basis. Any parts and materials replaced shall meet or exceed the quality standards of the part or material being replaced. Such repairs shall be pre-approved in writing by the City prior to the Awardee commencing the work. The Awardee shall submit a time estimate to the City for all work that is necessary. No compensation shall be paid for travel time to and from the work location. The estimate shall be accurate within 20 percent in terms of the actual hours that are billed to the City. The City reserves the right to exercise the option of soliciting other competitive quotes for any repair work when deemed necessary.

12. REPORTS

All results of the test performed as a result of this specification shall be compiled in the form of a single report, see section 15 for a sample test report.

12.1 Two copies of this report shall be provided: one in electronic format and one hard copy.

12.2 This report shall reference each transformer by the AWT Plant’s equipment number. The information presented in this report shall be displayed in a format that clearly represents the tests performed and the resulting information. The information in this report shall include but is not limited to all items listed in the order as shown in Section 14 of the Technical Specifications.

12.3 A list of the repairs that are performed shall also be included in this report. All deficiencies and repair recommendations shall be clearly identified. This list shall include all information associated with the repairs such as materials used and amount of time expended to perform the repair.

12.4 The hard copy of the report generated shall be contained in a bound booklet that is suitable for becoming a permanent record.

12.5 The electronic copy shall be compiled into one single report in pdf format.

12.6 The reports shall be completed and turned over to the City within thirty days after the field testing and oil sampling is completed.

12.7 All test results obtained as a result of work performed under these specifications shall be deemed the property of the City of Tampa.

13. RESPONSIBILITIES

13.1 The work shall be coordinated with the Treatment Plant's Electrical Maintenance Representative It should be understood that the transformers described herein are presently in service and some delay in the work is to be expected as the equipment is taken out of service for testing. The City will make every effort to make the transformers available to the Awardee in a timely manner.

13.2 The Awardee shall have the oil analysis performed by a laboratory that is certified by the Association for Laboratory Accreditation. These results shall be certified by the laboratory performing the work.

13.3 The Awardee shall always maintain safe working conditions while engaged in the work resulting from this specification. These safety procedures shall be in line with the recommendations of OSHA and those that are considered good electrical maintenance practice.

14. LIST OF TRANSFORMERS

Howard F. Curren AWT Plant

City of Tampa ID# Equipment # Manufacturer Model Number Serial Number

T038-041-01 41-38-1 GENERAL ELECTRIC GEI 65074 L713248THMA

T038-041-02 41-38-2 GENERAL ELECTRIC GEI 65074 L713248THMA

T038-044-01 T-1A-1 COOPER 956002168

T038-044-02 T-1B-1 COOPER 956002167

T038-044-03 T-3A-1 ABB ELECTRIC 3FEE26893D 15JC768810001

T038-044-04 T-3B-1 GENERAL ELECTRIC GEI 79025 0100098TO G

T038-044-05 T-3A-2 ABB ELECTRIC F3EE14819R 14JC701960004

T038-044-06 T-3B-2 ABB ELECTRIC F3EE14819R 14JC701960001

T038-044-07 T-3A-3 ABB ELECTRIC F3EE14819R 14JC701960003

T038-044-08 T-3B-3 ABB ELECTRIC F3EE14819R 14JC701960002

T038-044-09 T-2A-1 ABB ELECTRIC V3EE56819Q 15JC701950003

T038-044-10 T-2B-1 ABB ELECTRIC V3EE56819Q 15JC701950002

T038-044-11 T-4A-2 T038-044-12 T-4B-2

T038-044-13 T-4A-1 ABB ELECTRIC F3EE 1868D 15JC747310001

T038-044-14 T-4B-1 ABB ELECTRIC F3EE 1868D 15JC747310002

T038-044-15 T-2A-2 ABB ELECTRIC 7E778825F 15JC762200002

T038-044-16 T-2B-2 ABB ELECTRIC 7E778825F 15JC762200001

T038-044-17 T-2A-3 ABB ELECTRIC V3EE567TF7 13JC629900001

T038-044-18 T-2B-3 ABB ELECTRIC V3EE56819Q 14JC701950001

T038-044-19 T-5A-1 ABB ELECTRIC F3EE14819R 15JC701960007

T038-044-20 T-5B-1 ABB ELECTRIC F3EE14819R 15JC701960008

T038-044-21 T-5A-3 ABB ELECTRIC F3EE14819R 15JC701960005

T038-044-22 T-5B-3 ABB ELECTRIC F3EE14819R 15JC701960006

T038-044-23 T-5A-5 ABB ELECTRIC V3EE56819Q 15JC701950004

T038-044-24 T-5B-5 ABB ELECTRIC V3EE56819Q 15JC701950005

T038-044-25 T-5A-2 ABB ELECTRIC F37EO18CYQ 15JC791780002

T038-044-26 T-5B-2 ABB ELECTRIC F37EO18CYQ 15JC791780001

T038-044-27 T-4A-3 WESTINGHOUSE RSL PAL 3776-0101

T038-044-28 T-4B-3 WESTINGHOUSE RSL PAL 3776-0102

T038-044-29 T-2A-1A WESTINGHOUSE V37E563R56 90J614176

T038-044-30 T-2B-1A WESTINGHOUSE V37E563R5G 90J614130

T038-044-31 T-8A-1 ABB ELECTRIC F37E143R5H 90J620268

T038-044-32 T-8B-1 ABB ELECTRIC F37E143R5H 90J619266

T038-044-33 T-8A-2 ABB ELECTRIC STYLE V37E563TZK 90J681166

T038-044-34 T-8B-2 ABB ELECTRIC V37E563TZK 90J681107

T038-044-35 T-5A-6 ABB ELECTRIC F37E773TZL 90J682021

T038-044-36 T-5B-6 ABB ELECTRIC F37E773TZL 90J682014

City of Tampa ID# Equipment # Manufacturer Model Number Serial Number

T038-044-37 T-9A-1 SQUARE D N/A 900808-A2

T038-044-38 T-9B-1 SQUARE D N/A 900808-A1

T038-044-39 T-2A-4 ABB ELECTRIC STYLE F3EE0148F1 93J349084

T038-044-40 T-2B-4 ABB ELECTRIC STYLE F3EE0148F1 93J346173

T038-044-41 T-9A-2 SQUARE D N/A 930384-A2

T038-044-42 T-9B-2 SQUARE D N/A 930384-A1

T038-044-43 T-8A-3 WESTINGHOUSE PW-1002 TAA 4059-0102

T038-044-44 T-8B-3 WESTINGHOUSE PW-1002 SBA-4059-0102

T038-044-45 T-8A-4 WESTINGHOUSE PLAZA PAD TAA 4059-0101

T038-044-46 T-8B-4 WESTINGHOUSE PLAZA PAD TAA 4059-0102

T038-044-47 T-8A-5 WESTINGHOUSE PM 100 TAA 4060-0101

T038-044-48 T-8B-5 WESTINGHOUSE PM 1000 TAA 4060-0102

T038-044-49 T-5A-7 CUTTER HAMMER 1500 KVA 05J262166

T038-044-50 T-5B-7 CUTTER HAMMER ILUJ 05J262202

T038-085-01 T-6-1A GENERAL ELECTRIC PROLEC S188-01

T038-085-02 T-6-1B GENERAL ELECTRIC PROLEC S188-02

T038-248-01 TX-P1 EATON (FR3 Oil) 0002NP13XMEA 2050001464 T038-248-02 TX-P2 EATON (FR3 Oil) 0002NP13XMEA 2050001463 IS029-248-01 VFI-1 EATON (FR3 Oil) VFI 5 CP5720048080 IS029-248-02 VFI-2 EATON (FR3 Oil) VFI 5 CP5720048081

REMAINDER OF PAGE INTENTIONALLY LEFT BLANK

15. Sample Test Report

(Company name, phone number, & address) Technician: Location: Equipment No.:

Date of Last test: Begin Time: End Time: Date:

TRANSFORMER DATA

Manufacturer: Year: KVA: Hertz: Primary Model Number: Weight: Class: Temp. Rise: Sec. Vol Serial Number: Tank Type: Phase: Impedance: Pressure Insulation Type: Oil Type: Oil Temp: Tap Settings: As Found: As

INSPECTION LIST

Oil Level: Added: Y N Amount: N Level: Added: Y N Take Oil Sample* Check Radiators Temp. On-line Clean Cabinets Gaskets Temp. Off-line Clean Insulators Fans & Controls Check if Oil Leaks Clean Bushings Grounding Pressure Relief Device Check Gauges Tap Switch Isolation Valves Check Valves Exterior Condition Mechanical Relief Valves Additional Accessories Not Listed:

*Note any problems or corrections completed in spaces beside check boxes

TRANSFORMER TESTING

Insulation Resistance Test Testing Equipment:

Test Voltage: Ambient Temperature:

HV to LV &

Gnd. LV to HV & Gnd. HV to LV Notes 30 seconds 60 seconds 10 minutes 60/30 ratio Polarization Ind.

Turns Ratio Testing Equipment:

Phase 1 Phase 2 Phase 3 Notes H-Volt X-Volt H-Tap 2 H-Tap 1 H-Tap 3 H-Tap 4 H-Tap 5 H-Tap 2 Calculated Ratio Measured Ratio Deviation Phase Angle Power Factor Test Testing Equipment:

Measurement Test kV mA Watts % PF Corr./ Corr. Factor Cap (

CH + CHL

CH

CHL (UST)

CHL

CL + CLT

CL

CLT (UST)

CLT

Winding Resistance Test Testing Equipment:

Terminals H1 - H2 H2- H3 H3 - H1 X1 - X2 X2 -X DC Resistance % Difference