Products / Pad-Mounted Transformers
Three-Phase Pad-Mounted Transformers
UL-listed, liquid-filled, 45-4,000 kVA
Three-phase, liquid-immersed pad-mounted transformers for underground distribution: the workhorse unit for data centers, utility feeds, commercial sites, and industrial plants.
Every unit is UL listed under file E526441 and evaluated to IEEE C57.12.00 and C57.12.28, with CSA C227.4 coverage for Canadian projects. Available with conventional mineral oil or less-flammable vegetable-oil fluid (FR3 type) for fire-sensitive sites.
Technical range
| Rated capacity | 45 – 4,000 kVA |
|---|---|
| Primary voltage | Up to 24,940 GrdY/14,400 V (20.78 / 22.86 / 23 / 23.9 / 24.94 kV classes) |
| Secondary voltage | 208Y/120 V – 480Y/277 V (custom on request) |
| Frequency | 60 Hz |
| Cooling | ONAN, 65 °C average winding rise |
| Taps | ±2 × 2.5% high-voltage tap changer |
| Primary feed | Loop or radial, dead-front |
| Insulating fluid | Mineral oil (<2 ppm PCB) or less-flammable vegetable oil |
| Windings | Aluminum (copper on request) |
| Vector group | Dyn1 (others on request) |
Standard features
- ■Bolted, tamper-resistant compartment construction per IEEE C57.12.28
- ■Bay-O-Net or dry-well canister fusing options
- ■Pressure-relief valve, liquid-level and temperature gauges, drain valve
- ■Stainless hardware and multi-coat finish (Munsell green standard)
- ■100% routine-tested before shipment, test reports included
Standards & certification
- UL Listed (file E526441)
- IEEE C57.12.00-2021
- IEEE C57.12.28
- CSA C227.4 (Canada)
In production
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