SATPC0040714 Tab 04 4 SOW..pdf
PDF 86 KB Posted
- Attached to
- WFTCA Project - Low Voltage Transformer Federal contract opportunity
- Solicitation number
- 80NSSC26926566Q
About this file
This document is a Statement of Objectives and Detailed Technical Specification for the purchase and delivery of a liquid-filled secondary unit substation transformer.
The solicitation requires procurement of one (1) outdoor-rated, three-phase transformer with a 2,000 kVA capacity, featuring a 13,800 V primary (Delta configuration) with +2/-2 taps at 2.5% increments and a 480Y/277 V secondary output. The transformer must utilize natural ester fluid (FR3) insulating medium with non-detectable PCB content (<1 ppm) and comply with IEEE, NEMA, UL, DOE, and ASTM standards. The unit shall include copper windings and coils, a 304L stainless steel tank with dry nitrogen blanket, and all exposed hardware in stainless steel. Electrical specifications mandate impedance greater than 5.32% at 85°C, maximum sound level of 61 dB, and DOE 2016 efficiency compliance. The transformer must be equipped with comprehensive monitoring devices including dial-type temperature and liquid-level gauges with alarm contacts, pressure-vacuum gauges, winding temperature indicators, and a sudden pressure relay. Additional requirements include three high-voltage porcelain bushings (55 inches height) mounted on the sidewall with 2-hole spade terminals, four low-voltage 6-hole integral spade bushings, separate NEMA Type 4X enclosure for instrumentation, and radiator fans controlled by liquid temperature with manual ON/AUTO/OFF switching. The delivered unit must include a full deck pallet for shipping and a testing and commissioning plan. Delivery is required to the High Pressure Gas Facility at Stennis Space Center, Mississippi, within 52-110 weeks.
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| File | Type | Posted |
|---|---|---|
| SATPC0040714 Tab 10 RFQ Open Market Template.pdf |
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Text version
1. Objectives:
Purchase and deliver the following:
Description Notes QTY:
Transformer, oil filled, 15 kV with taps, 480 V secondary 3 phase, 2,000 kVA, pad mounted, stainless steel tank, copper coils, mineral oil. Includes testing and commissioning plan.
None 1
2. Delivery:
Deliver to:
High Pressure Gas Facility (HPGF) 3305 Saturn Drive Stennis Space Center MS 39529
3. Delivery Timeline:
52-110 weeks
4. Detailed Technical Specification – Liquid-Filled Secondary Unit Substation Transformer Application: Outdoor
1. GENERAL DESCRIPTION
Provide one (1) liquid-filled secondary unit substation transformer meeting the requirements outlined below. The transformer shall meet all applicable IEEE, NEMA, UL, DOE, and ASTM standards, and be suitable for outdoor installation.
Transformer shall contain a less-flammable biodegradable natural ester insulating fluid (FR3) with non-detectable PCB content (<1 ppm) at the time of manufacture.
2. ELECTRICAL CHARACTERISTICS
• Type: Liquid-Filled Secondary Unit Substation
• Insulating Fluid: Natural Ester Fluid, FR3
• Core Material: Grain Oriented Steel
• Phase: Three-Phase
• Frequency: 60 Hz
• Ambient Temperature: 30 °C
• Average Winding Rise: 65 °C High Voltage (Primary)
• HV Rating: 13,800 V, Delta
• HV Taps: +2 / –2 at 2.5% increments
• HV BIL: 95 kV BIL Low Voltage (Secondary)
• LV Rating: 480Y/277 V
• LV BIL: 30 kV BIL
• LV Neutral: X0 bushing with ground strap Impedance
• Percent Impedance: Greater than 5.32% at 85 °C
Noise Level
• Maximum Sound Level: 61 dB Efficiency
• Meets DOE 2016 Efficiency Requirements
3. WINDINGS
• Primary and Secondary Windings: Copper
• Must comply with IEEE C57.12.00 and NEMA standards.
4. MARKINGS
• Stainless steel nameplate
• UL Listed marked on nameplate
• “Non-PCB” clearly indicated
• Nameplate fastened with stainless-steel screws
• Exterior visible warning sign:
“DANGER HIGH VOLTAGE” — 7 in × 10 in with 2-inch-high letters
5. TANK & CABINET CONSTRUCTION
Tank
• 304L Stainless Steel Tank & Base (ASTM A240/A240M compliant)
• Dry Nitrogen Blanket
• All exposed hardware stainless steel Cabinets and Enclosures
• High-Voltage ATC: Full-height, 304L SST, 18" deep, hinged door
• Low-Voltage ATC: Full-height, 304L SST, 18" deep, hinged door
• Separate NEMA 250 Type 4X enclosure for gauges & instrumentation
• Stand Control Box: 3M Mild Steel, 24" × 26" × 12", ANSI 61 finish
• Mild Steel 12-panel, center line 47" × 2"
• Hex-head cabinet handle bolt Fans
• Radiator fans controlled by liquid temperature
• 120 V control power (supplied by customer)
• Fan Control Switch: Manual ON / AUTO / OFF
6. BUSHINGS
High Voltage Bushings
• Three (3) HV porcelain bushings (live front)
• Three (3) HV 2-hole spade terminals
• High-voltage height: 55 inches
• Mounted on Sidewall Segment 2 Low Voltage Bushings
• Four (4) LV 6-hole integral spade bushings
• LV bushing height: 55 inches, 0.626-inch thickness (Coord 999P751 Rev05)
• Mounted on Sidewall Segment 4
7. MONITORING & PROTECTIVE DEVICES
• Dial-type temperature gauge with alarm contacts
• Dial-type liquid-level gauge with contacts
• Dial-type pressure-vacuum gauge with contacts
• Winding temperature indicator with contact
• Sudden pressure relay with seal-in
8. FITTINGS
• External drain valve with sampling port
9. OTHER REQUIREMENTS
• Full deck pallet for shipping
• Suitable for outdoor installation
• Grounding & bonding shall conform to UL 467
• Fluid shall be less-flammable, biodegradable, and contain no detectable PCBs (<1 ppm)
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