SBP‑75‑XFMR‑ND‑ISO
75 kVA Isolation Transformer
75 kVA mobile isolation transformer without integrated distribution, featuring 400 A cam-lock input and output connections. A four-position selector switch provides 480 V or 600 V to 120/208 V step-down operation, plus two reverse-feed settings for 208 V to 480 V or 600 V step-up operation. The reverse-feed settings disconnect the neutral-to-ground bond.
Rating75 kVA
Primary480/600 V switchable
Secondary120/208 V Y
Full-load secondary208 A @ 208 V
Features
- Wide range of options and accessories available
- Simple access for maintenance and operations
- Weatherproof enclosure, NEMA 3R compliant
- Safety guards for all electrical connections
- All parts powder coated, galvanized or aluminum
- Single point lifting bail system, engineered and rated
- UL 489-rated built-in adjustable breakers for transformer protection
- Switchable 480/600 V primary with lockable selector switch
Transformer
- 3-phase isolation transformer, aluminum windings, self-cooled (ANN/AN)
- Efficiency: U.S. DOE 2016 (10 CFR Part 431); Canada NRCan 2019 (SOR/2018-201, Amd. 14) and Ontario Reg. 404/12
- Sound level meets NEMA ST-20
- CSA Certified – File LR34493 (5 kV max, 900 kVA max)
- UL Listed – File E108255 (600 V max, 750 kVA max)
- 220 °C / 428 °F insulation rating
Unit specifications
| Electrical | |
|---|---|
| kVA rating | 75 |
| Transformer type | Isolation |
| Primary voltage | 480/600 V switchable |
| Secondary voltage | 120/208 V Y |
| Full-load primary amps @ 480 V 3Ø | 90 A |
| Full-load primary amps @ 600 V 3Ø | 72 A |
| Full-load secondary amps @ 208 V 3Ø | 208 A |
| Efficiency (35% load, 75 °C) | 98.6 % |
| Impedance | 3.5% – 5.5% |
| Primary taps available | 480V, 570V, 600V, 630V |
| Average sound level | 50 dB |
| Cooling | ANN/AN self-cooled |
| Insulation rating | 220 °C |
| Connections and distribution | |
| Primary inlet | 400A Cam Lock (L1, L2, L3, GND); optional blank gland plate for hard wire |
| Secondary outlet | 400A Cam Lock (L1, L2, L3, N, GND); optional blank gland plate for hard wire |
| Protection | |
| Primary protection | 250 A MCCB, 0.8 adjustable, UL 489 |
| Secondary protection | 250 A MCCB, 0.8 adjustable, UL 489 |
| Physical | |
| Dimensions (L × W × H) | 36 × 36 × 41 in |
| Enclosure type | Type 3R Outdoor |
| Lifting | Single point bail |
| Compliance and approvals | |
| Standards | SPE-1000, UL 1640 compliant design, CSA C22.2 No. 5, UL 489, IEC/EN 60947-2, CE compliant |
Dimensions
Base wiring diagram
The SBP Transformer range without integrated power distribution is currently in development and may be subject to change. Final specifications will be provided for customer approval prior to manufacturing.