Compact Three Phase Pad Mounted Transformer Designed to Optimize Space and Deliver Consistent Power Distribution Performance
Three phase pad-mounted transformer, 75–5000 kVA, up to 34.5 kV, ANSI/IEEE compliant. Compact, oil-immersed, for safe underground distribution without extra enclosures.
This three-phase pad-mounted transformer is designed for outdoor underground distribution. Available in ratings from 75 to 5000 kVA with primary voltage up to 34.5 kV. Fully ANSI/IEEE compliant with oil-immersed cooling and compact pad-mounted enclosure (NEMA 3R) requiring no extra fencing. Safe, durable, and easy to maintain for residential, commercial, industrial, and renewable energy applications.
- Low-profile, space-saving design ideal for tight urban sites and landscape integration
- Compartmentalized construction with separate HV/LV sections, dead-front option, and tamper-proof locks
- ANSI/IEEE, NEMA, DOE compliant with UL availability for smooth utility acceptance
- 65°C rise, premium core, copper/aluminum windings for low losses and 30+ year lifespan
- Flexible configuration including radial or loop feed, mineral oil or FR3, and custom voltages and accessories
| Specification | Details |
|---|---|
| Rating | 75-5000 kVA |
| Primary Voltage | Up to 34.5 kV, BIL up to 200 kV |
| Secondary Voltage | 120-600 V (e.g., 208Y/120, 480Y/277, 600Y/347) |
| Cooling | ONAN/ONAF/KNAN, 65°C rise |
| Core & Windings | Grain-oriented silicon steel core; copper or aluminum windings |
| Fluid Options | Mineral oil or biodegradable FR3 ester |
| Feed Configuration | Radial (standard) or loop (6 HV bushings) |
| Tap Changer | 5-step no-load |
| Enclosure | NEMA 3R, lockable, weatherproof, corrosion-resistant coating available |
| Optional Features | Bayonet fuses, load-break switches, surge arresters, electrostatic shielding, K-factor design |
- Residential Subdivisions: Low noise (<65 dB), tamper-proof, underground feed with no overhead lines; radial feed for cost efficiency
- Commercial Complexes: Loop feed for uninterrupted power in malls, hotels, offices; optional K-factor for harmonic loads; high overload capacity
- Municipal Infrastructure: Corrosion-resistant coating for harsh environments; dead-front for public safety; compact footprint for street lighting and public buildings
- Renewable Energy: Step-up configurations up to 34.5 kV for solar, wind, BESS; FR3 fluid for eco-sensitive sites; remote monitoring ready; tap changer for voltage regulation
Calculate total load plus 20% growth. General guide: 75-500 kVA for residential (10-50 homes), 500-2500 kVA for commercial, 1000-5000 kVA for industrial or solar farms. Free load analysis available.
Radial is simpler and lower cost. Loop provides dual-source redundancy, allowing maintenance without outage - recommended for critical loads like hospitals, data centers, and malls.
30-40 years with routine oil testing, visual inspections, and gauge verification. Annual dielectric testing is recommended.
Yes. Lockable enclosures, separate HV/LV compartments, dead-front options, and NEMA 3R weatherproofing meet ANSI safety standards.
Yes. Any primary up to 34.5 kV, secondary 120-600 V, mineral oil or FR3, radial/loop, and full accessory range (fuses, switches, arresters, shielding, K-factor).
ANSI C57.12.00/34/90, IEEE, NEMA, DOE, CSA (optional). UL available. Complete factory test reports provided.
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