Typical features
- Dry-type construction without insulating liquid.
- VPI isolation and cast-resin designs for different voltage classes.
- Copper / aluminum winding options.
Product overview
Dry-type transformers
Low- and medium-voltage dry-type transformers for commercial and industrial distribution, with VPI isolation and cast-resin designs.
Technical Specifications
Ratings and Options
Low-voltage dry-type
- Capacity range
- 15–2,500 kVA
- Primary voltage
- 110–600 V
- Secondary voltage
- 110–600 V
- Winding options
- Copper / aluminum, per customer requirements
- Phase
- Three-phase
- Insulation options
- Class H / Class R (220°C), by design
Medium-voltage cast-resin
- Capacity range
- 30–5,000 kVA
- Primary voltage
- 11–36 kV
- Secondary voltage
- 100–1,500 V
- Winding options
- Copper / aluminum, per customer requirements
- Insulation class
- Class H
- Cooling
- Natural air
Reference Configurations
225 kVA reference configuration
480 V / 415 V, three-phase ventilated dry-type.
| Parameter | Reference value |
|---|---|
| Rated capacity | 225 kVA |
| Primary / secondary voltage | 480 / 415 V |
| Phase / frequency | Three-phase / 60 Hz |
| Winding connection | Dyn1 |
| Winding material | Copper |
| Construction | Ventilated dry-type |
| Winding rise / insulation | 120°C / Class H |
| HV tap adjustment | ±2 × 2.5%, five positions |
| BIL | 10 kV |
| Impedance | 4.5% ±10% |
| No-load loss | 390 W |
| Load loss | 3,850 W |
| Efficiency at 35% load, 75°C | 98.99% |
| K-factor | K4 |
| Sound level | 48 dB |
| Enclosure | IP23 |
Reference configurations are illustrative. Final specifications, certification and drawings are confirmed for your project.
Configuration options
- Specify kVA, primary and secondary voltages, frequency and winding connections.
- Select taps, temperature rise, cooling and loss requirements.
- UL 1561 Listed designs are available in selected low-voltage copper series.
- UL 1562 Recognized Component designs are available in selected medium-voltage copper series.
Protection & enclosure review
- Select enclosure, ventilation and indoor or outdoor installation requirements.
- Coordinate terminal access, clearances and overtemperature protection.
- Confirm the applicable certification and test documentation for the selected design.
Typical applications
- Commercial facilities
- Industrial facilities
- Data centers
- Healthcare facilities
- Equipment voltage conversion
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