Single-Phase Pad Mounted Transformer
Single-phase pad-mounted transformers with clamshell cabinet design for easy access, flexible protection and switching options, and multiple voltage ratings.
Our single-phase pad-mounted transformer is built around a clamshell cabinet, a design that fully opens to give crews direct, unobstructed access to internal connections.
Overview
This construction speeds up installation, inspection, and maintenance work while keeping the enclosure tamper-resistant and dead-front compliant for public safety. Pad-mounted transformers of this type are widely used in underground distribution systems, including residential subdivisions, commercial developments, and light industrial sites where overhead lines aren't practical or permitted.
Design flexibility is a core strength of this transformer class. It supports a range of protection and switching configurations, including loop and radial feed arrangements, so utilities and contractors can match the unit to the distribution network layout rather than the other way around. Multi-service capability means a single transformer can serve multiple connection points, reducing the number of units needed across a service area. This adaptability, combined with configurable primary and secondary voltage options, makes the transformer suitable for new construction, system upgrades, and replacement projects alike.
Reliability and safety are built into every configuration. The transformer is engineered to meet the performance requirements of modern distribution systems and to comply with applicable ANSI and IEEE safety standards for pad-mounted equipment. Available in a wide range of kVA ratings and advanced configuration options, it's suited to utilities, electrical contractors, and industrial customers who need dependable single-phase power distribution with the flexibility to scale to different load and site requirements.
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Product Specifications
- Frequency
- 60 Hz
- Standards
- ANSI / IEEE / DOE 2016 / CSA / IEC 60076
- Insulation Type
- Oil-immersed, clamshell cabinet
- Tapping Ranges
- ±2×2.5%
- Available Capacities
- 10 – 167 kVA (or custom design)
- High Voltage Options
- 2400 / 4160 / 7200 / 7620 / 12000 / 12470 / 13200 / 13800 / 14400 / 19920 / 24940 / 34500 V
- Low Voltage Options
- 110 / 120 / 208 / 240 / 277 / 347 / 415 / 416 / 480 / 600 / 690 V
- DOE2016 Efficiency Range
- 98.82% – 99.49%
- Enclosure Style
- Clamshell cabinet with lockable HV compartment
- Model Number Pattern
- VO-UT-1PDM-{kVA}-{HkV}-{LW}
Specification Table
| Capacity (kVA) | DOE2016 Efficiency (%) | No-load Loss (W) | On-load Loss (W) | W (mm) | D (mm) | H (mm) |
|---|---|---|---|---|---|---|
| 15 | 98.82 | — | — | — | — | — |
| 25 | 98.95 | — | — | — | — | — |
| 37.5 | 99.05 | — | — | — | — | — |
| 50 | 99.11 | 60 | 330 | 610 | 740 | 840 |
| 75 | 99.19 | 80 | 370 | 610 | 740 | 840 |
| 100 | 99.25 | 100 | 450 | 610 | 760 | 840 |
| 167 | 99.33 | 130 | 850 | 740 | 840 | 840 |
| 250 | 99.39 | — | — | — | — | — |
| 333 | 99.43 | — | — | — | — | — |
| 500 | 99.49 | — | — | — | — | — |
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