PAD MOUNT
THREE PHASE
kVA Ratings: 45 kVA through 5 MVA
Voltage Ratings: 34,500 GrdY / 19,920 V — up to 170 kV BIL
Technical Specifications & Configurations
Ratings & Electrical Specs
- Power Ratings
- Available ratings through 5 MVA (Higher ratings subject to engineering review)
- Voltage Ratings
- Up to 34,500 GrdY / 19,920 V
- Operating Frequency
- 60 Hz (50 Hz available upon request)
- BIL
- Selected for the specified voltage rating and application (up to 170 kV BIL)
- Temperature Rise
- 65°C average winding rise
- Winding Material
- Copper (Cu) or Aluminum (Al)
- Core Construction
- High-grade Grain-Oriented Electrical Steel (GOES)
- Cooling Class
- Liquid-filled, self-cooled (ONAN / KNAN)
Standard Design Features
- Separate HV and LV compartments divided by a full-height steel barrier
- Welded, hermetically sealed-tank construction
- 200 A well/insert or 600 A integral separable connector interfaces (IEEE Std 386)
- Grounding provisions & pressure-relief valve or internal fault detection (IFD)
- Mineral oil insulating fluid (ASTM D3487)
- Laser-etched / Anodized Aluminum nameplate
- Secure three-point door latching mechanism with padlocking provisions
Available Optional Features
- Natural ester fluid (available upon request)
- Dead-front or live-front construction
- Customer-specified HV/LV bushings, pressure-relief valve, or internal fault detection (IFD)
- Externally operated de-energized tap changer (DETC) & dual-voltage switches
- 2-position / 4-position loadbreak switches
- Bay-O-Net fuse assembly with current-limiting backup fuses or isolation links
- Complete instrumentation: Liquid level gauge, dial thermometer, pressure/vacuum gauge, drain and sampling valves
- 304 Series Stainless-steel tank and cabinet
Documentation, Testing & Applicable Standards & Fluid Specifications
Engineering Documentation Provided
- Certified Test Reports (CTR)
- Technical Data Sheets & Loss/Efficiency Calculations
- Component Approval Documents & Submittal Approval Drawings
DOE Energy Efficiency
Designed to comply with the amended U.S. DOE energy conservation standards under 10 CFR Part 431, Subpart K — applicable to covered distribution transformers manufactured on or after April 23, 2029.
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Three-Phase Pad-Mounted — RFQ Form
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Engineering Notice: Final ratings and features are confirmed for each order. Additional configurations, accessories, testing, documentation, and other project-specific requirements may be available upon request and are subject to engineering review.