B.08.02 Attachment A - Transformer nameplate data - Lower Granite.pdf
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- Attached to
- Transformer Repair Parts - 2
- Solicitation number
- W912EF23Q0031
About this file
This file is an attachment to a federal solicitation for transformer repair parts. The Department of the Army Corps of Engineers Engineering District Walla Walla seeks to procure replacement parts for transformers located at its Lower Granite facility. Bids are due by the date listed in solicitation number W912EF23Q0031. Offerors should review the technical specifications in attachment A to identify the nameplate data of the transformers requiring repair parts. The solicitation is open to all responsible sources and aims to award a firm-fixed price contract for stocking replacement components to restore transformers to normal operation.
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Transformer T1 and T2 Gasket Repair
Design Documentation Report
Final Design Review
Prepared By:
Hydroelectric Design Center
U.S. Army Corps of Engineers
January 2021
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Lower Granite Dam
Page | 7
1.3. TRANSFORM ER NAMEPLATE INFORMATION
Table 1: Existing Transformer Nameplate Data
Lower Granite Dam 500 kV Single-Phase GSU Transformers (T1-A, T1-B, T1-C)
Manufacturer Westinghouse
Serial Numbers 7002007, 7001968, 7002026 Date of Manufacture 1975
KVA Rating 164,000/218,666 @ 55 °C 244,900 @ 65 °C
KV Ratings High-Voltage (H): ......................................500,000 L-L
Low-Voltage (X): .........................................13,200 L-L
Low-Voltage (X): .........................................13,200 L-L
Basic Impulse Insulation Levels High-Voltage (H): .......................................... 1425 kV
High-Voltage Neutral (H0): ...............................110kV
Low-Voltage (X): ............................................. 110 kV
Low-Voltage (Y): ............................................. 110 kV
Impedance (T1-A show n) H-X @ 82,000 kVA .........................................17.44%
H-Y @ 82,000 kVA……………………...........17.70%
Core design Shell-form
Taps (high-voltage w inding) +3, -1 @ 2.5% per tap (operated on tap 4)
Phasing Single
Cooling Class OA/FA
Oil Preservation System Nitrogen blanket
Bushings High-Voltage (H):
Manufacturer:.................................. Westinghouse
Type: ...................................... Oil-f illed condenser
Bushing c lass:......................................... Type “O”
Catalog number: ............................... 264D500G01
Connection:...............................Bottom-connected
KV Class: ................................................... 500 kV
Continuous Current Rating: ...................... 1500 A
BIL: ........................................................... 1550 kV
High-Voltage Neutral (H0):
Manufacturer:..................................................ABB
Type: ...................................... Oil-f illed condenser
Bushing c lass:................................ Type O Plus C
Catalog number: ............................ T025W0412AT
Connection:...............................Bottom-connected
KV Class: ..................................................... 25 kV
Continuous Current Rating: ...................... 1200 A
BIL: ............................................................. 150 kV
Low -Voltage (X & Y):
Manufacturer:.................................. Westinghouse
Type: ...................................... Oil-f illed condenser
Bushing c lass:........................................ Type “RJ”
Catalog number: ......................................471C375
Connection:...............................Bottom-connected
KV Class: ..................................................... 23 kV
Continuous Current Rating: ...................10,000 A
BIL: ............................................................. 150 kV
Page | 8
Weights and Capacities Untanking (heaviest piece):....................325,000 lbs.
Tank & Fitt ings: .......................................150,000 lbs.
Oil (15,539 gal): ......................................116,500 lbs.
Total w eight:............................................591,500 lbs.
Page | 9
Table 2: Existing Transformer Nameplate Data
Lower Granite Dam 500 kV Single-Phase GSU Transformers (T2-A, T2-B, T2-C)
Manufacturer Westinghouse
Serial Numbers 7002549, 7002544, 7002547 Date of Manufacture 1978
KVA Rating 82,000/109,000 @ 55 °C
122,454 @ 65 °C
KV Ratings High-Voltage (H): ..................................... 500,000 L-L
Low-Voltage (X): ........................................ 13,200 L-L
Low-Voltage (Y): ........................................ 13,200 L-L
Basic Impulse Insulation Levels High-Voltage (H): .......................................... 1425 kV
High-Voltage Neutral (H0): .............................. 110kV
Low-Voltage (X): ............................................. 110 kV
Low-Voltage (Y): ............................................. 110 kV
Impedance (T2-A show n) H-X @ 41,000 kVA........................................... 9.10%
H-X @ 41,000 kVA........................................... 9.40% Core design Shell-form
Taps (high-voltage w inding) +3, -1 @ 2.5% per tap (operated on tap 4) Phasing Single
Cooling Class OA/FA Oil Preservation System Nitrogen blanket
Bushings High-Voltage (H):
Manufacturer: ..................................Westinghouse
Type:.......................................Oil-f illed condenser
Bushing c lass: ......................................... Type “O”
Catalog number: ..................................... 264D500
Connection: .............................. Bottom-connected
KV Class:.................................................... 500 kV
Continuous Current Rating: .......................1600 A
BIL: ........................................................... 1550 kV
High-Voltage Neutral (H0):
Manufacturer: ................................................. ABB
Type:.......................................Oil-f illed condenser
Bushing c lass: ................................Type O Plus C
Catalog number: ............................T025W0412AT
Connection: .............................. Bottom-connected
KV Class:...................................................... 25 kV
Continuous Current Rating: .......................1200 A
BIL: ............................................................. 150 kV
Low -Voltage (X & Y):
Manufacturer: ..................................Westinghouse
Type:.......................................Oil-f illed condenser
Bushing c lass: ........................................Type “RJ”
Catalog number: ..................................... 1359C14
Connection: .............................. Bottom-connected
KV Class:...................................................... 25 kV
Continuous Current Rating: .......................7500 A
BIL: ............................................................. 150 kV
Page | 10
Weights and Capacities Untanking (heaviest piece): ................... 211,000 lbs.
Tank & Fitt ings: ........................................ 61,000 lbs.
Oil (10,667 gal): ........................................ 80,000 lbs.
Total w eight: ……………………………...352,000 lbs.
| EXECUTIVE SUMMARY |
| 1. Introduction |
| 1.1. Project Purpose |
| 1.2. Site Specific Information |
| 1.2.1. Access to the Transformer Deck and Proposed Refurbishment Location |
| 1.3. Transformer Nameplate Information |
| 1.3.1. List of Project Specific Abbreviations/Definitions |
| 1.3.2. Project Delivery Team (PDT) |
| 2. Project Description |
| 2.1. Project Scope |
| 2.2. Project Schedule and Deliverables |
| 2.3. Project Budget |
| 2.4. Acquisition Process |
| 2.5. Work Windows (Outage Constraints) |
| 1.1.1. |
| 2.5.1. T1 Bank Outage Constraints |
| 2.5.2. T2 Bank Outage Constraints |
| 2.6. Other Project Constraints (physical, environmental, etc.) |
| 1.1. |
| 2.7. Ongoing or Upcoming Project Conflicts |
| 2.8. Hazardous Materials |
| 2.8.1. Polychlorinated Biphenyls (PCBs) |
| 2.8.2. Lead Based Paint |
| 2.8.3. Asbestos |
| 2.9. Design Guidance And Standards |
| 2.10. Design and Reference Drawings |
| 2.11. Specifications Sections |
| 3. Design Documentation |
| 3.1. Pending Design Decisions and Questions |
| 1.1.1. |
| 1.1.1. |
| 1.1.1. |
| 3.1.1. Electrical Assessment |
| 3.1.1.1. Gaskets |
| 3.1.1.2. Valves |
| 3.1.1.3. High-voltage bushings |
| 3.1.1.4. Low-voltage bushings |
| 3.1.1.5. Thermowells |
| 3.1.1.6. Transformer Oil Condition |
| 3.1.1.7. Addition of oxygen inhibitor to transformer oil |
| 3.1.1.8. De-energized Tap Controls (DETC) |
| 3.1.1.9. Low-voltage flexible connectors |
| 3.1.1.10. Low-voltage Expansion Bellows |
| 3.1.1.11. Transformer paint |
| 3.1.1.12. High-voltage neutral bushings |
| 3.1.1.13. Pressure relief device (PRD) |
| 3.1.1.14. Rapid pressure rise relay (RPRR) |
| 3.1.1.15. Accessory gauges |
| 3.1.1.16. Nitrogen regulator system |
| 3.1.1.17. On-line oil dissolved multi-gas monitor |
| 3.1.1.18. O&M Manual Update |
| 3.2. Electrical Design |
| 3.2.1. Electrical Design Criteria and Constraints |
| 3.2.2. Electrical Scope of Work |
| 3.2.3. Major Electrical Work |
| 3.2.3.1. Transformer Oil |
| 3.2.3.2. Isophase Bus and Bus Structure |
| 1.1.1.1. |
| 1.1.1.1. |
| 3.2.3.3. High-voltage Tubular Bus |
| 3.2.3.4. Internal Inspection |
| 3.2.3.5. Bushings |
| 3.2.3.6. Transformer Low-voltage Flexible Connectors |
| 3.2.3.7. Transformer Expansion Bellows |
| 3.2.3.8. Transformer DGA Monitor |
| 3.2.4. Transformer Painting and Cleaning |
| 3.2.5. Transformer Testing and Commissioning |
| 4. Advertising, Source Selection, and Award |
| 5. Appendix A – Engineer’s Estimate |
| 6. Appendix B – ABB Bushings Quote |
| 7. Appendix C – Product Data |
| C.1 ABB 500kv O Plus C Type Bushings Catalog Info |
| C.2 ABB 500KV O Plus C Type Bushings Drawings – T1 and T2 Bank |
| C.3 ABB Bulk Type RJ Bushings Drawings – T1 Bank |
| C.4 ABB Bulk Type RJ Bushings Drawings – T2 Bank |
| C.5 Kelman MultiTrans Transformer Gas Analyzer |
| 8. Appendix D – Reports |
| D.1 T1 and T2 Summary Background for NREX Document |
| D.2 BPA Subagreement |
| D.3 PCB Test Results |
| D.4 Doble Tests T1 Bank |
| D.5 Doble Tests T2 Bank |
| D.6 Nitrogen T1 Bank Logs |
| D.7 Nitrogen T2 Bank Logs |
| D.8 Oil Test Results |
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