Attachment 1 BSM Transformers Combined Specification.pdf
PDF 3 MB Posted
- Attached to
- Station Service Transformers for North Dakota
- Solicitation number
- 89503425QWA001064
About this file
This document is a detailed technical specification for two station service transformers for the Western Area Power Administration's North Dakota Maintenance Office. The specification requires two single-phase, 50kVA transformers with specific technical requirements, including 43.8kV primary voltage, 120/240V secondary voltage, ONAN cooling, and 65°C temperature rise. Key specifications include draw-lead threaded stud terminals, electrical grade mineral oil, de-energized tap changers, and ANSI 70 gray paint.
The transformers are for two specific locations - Washburn KX3A and Killdeer KX3A - each with unique height and base dimensions. The specification mandates new units (no refurbished transformers), includes a 2-year warranty, and specifies delivery to the Western Area Power Administration in Bismarck, ND. Delivery instructions require coordination with Bradley Seely at least seven days prior, with delivery permitted between 8:00 a.m. and 4:00 p.m. Monday through Thursday, excluding government holidays. Appendices include existing unit outlines, foundation details, and location photographs for both transformer sites.
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Other files
| File | Type | Posted |
|---|---|---|
| Attachment 2 Spare Station Service Padmount.pdf | ||
| 89503425QWA001064.pdf |
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Text version
North Dakota Maintenance Office
Bismarck Area Station Service Transformers
10/1/2024
North Dakota Maintenance Office
1. General: (2) Transformers to be Provided. Single phase, ONAN, 60Hz, 65°C Rise, meets all applicable NEMA and ANSI standards.
Note: Refurbished units will not accepted
1.1. Capacity: 50kVA
1.2. Polarity: Subtractive
1.3. Primary Voltage: 43.8kV (L-L)
1.4. Primary BIL: 250kV
1.5. Primary Bushings: Draw-lead with threaded stud terminal
1.5.1. Composite or Porcelain Bushings accepted
1.6. Secondary Voltage: 120/240V
1.7. Secondary BIL: 30kV
1.8. Secondary Bushings: NEMA 4-hole pads included
1.9. Insulating Fluid: Electrical Grade Mineral Oil, Type II (Non-PCB marked on nameplate)
1.10. DETC: Primary De-energized tap changer with ±2.5% and ±5% taps (5 positions total)
1.11. Accessories:
1.11.1. 1” Fill Valve
1.11.2. 1” Drain Valve
1.11.3. 1” Vacuum Valve
1.11.4. Pressure Relief Valve
1.11.5. Provisions for Tank Grounding
1.11.6. Level Gauge or Sight Glass
1.12. Paint: ANSI 70 gray
2. Warranty: 2-year warranty from the date of receival
3. Unit 1: Washburn KX3A – Unit 1 will require an overall height to be specified below. A galvanized steel base will be provided to match the existing anchor bolt layout as well as achieve the proper height. Anchor Bolts will not be required.
3.1. Overall Height: 9’ (Including HV Bushing)
3.2. Base: 1’-10” x 2’-4”
3.3. Anchor Bolt Holes: (4) 11/16” Diameter
4. Unit 2: Killdeer KX3A – Unit 2 will require an overall height to be specified below. A galvanized steel base will be provided to match the existing anchor bolt layout as well as achieve the proper height. Anchor Bolts will not be required.
4.1. Height: 7’-4” (Including HV Bushing)
4.2. Base: 2’-4” x 2’-4”
4.3. Anchor Bolt Holes: (4) 7/8” Diameter
North Dakota Maintenance Office
5. Delivery:
Western Area Power Administration Attn: Brandon Foss
700 North Bismarck Expressway Bismarck, ND 58501
Shipper is to contact Bradley Seely at 701-221-4501, to verify the delivery site is ready for delivery, to refine the delivery destination directions, and to coordinate delivery at least seven days prior to delivery. Delivery shall be made between 8:00 a.m. and 4:00 p.m. Monday through Thursday, excluding Government holidays.
TKeller Typewritten Text
APPENDIX A: EXISITNG UNIT 1 OUTLINE
APPENDIX B: UNIT 1 EXISTING FOUNDATION
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APPENDIX C: UNIT 1 LOCATION
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APPENDIX D: EXISTING UNIT 2 OUTLINE
APPENDIX E: UNIT 2 EXISTING FOUNDATION
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APPENDIX F: UNIT 2 LOCATION
| 1 BSM Station Service Transformers |
| North Dakota Maintenance Office |
| Bismarck Area Station Service Transformers |
| 10/1/2024 |
| 2 WB KX3A |
| 3 wb_2025b-Layout1 |
| 4 WB KX3A |
| 5 KD KX3A |
| 6 kd_2004c |
| 7 KD KX3A |
File details come from the government source that posted it. Updated .