750 kva transformer 3 phase auto transformer
If your system runs at 240V or 415V but your equipment needs 480V, you don’t need a full isolation transformer—just a voltage match. That’s where our 750 kVA 3 phase auto transformer comes in.
We build dry-type units with compact design, high efficiency, and tight voltage control. Ideal for generator tie-ins, building service upgrades, and internal panel balancing. You choose copper or aluminum windings, insulation class, and tap settings. We’ll match your voltage profile—no guesswork.
Every transformer is full-load tested, clearly labeled, and delivered with wiring diagrams and terminal drawings. UL or CE? We’ve got it covered. Tell us your spec—we’ll ship the unit that fits it.
Photovoltaics – Austin, Texas, USA
One of our solar EPC clients in Austin needed to bring a 240V inverter bank up to 480V for grid interconnect. They didn’t want a full isolation setup—just clean, stable voltage rise.
We built a 750 kVA auto transformer, dry-type, with aluminum windings and a compact profile. It slipped right into their utility room and solved the mismatch without overengineering the system.
Energy Storage – Rotterdam, Netherlands
At a mid-size battery site near the Rotterdam port, the PCS system delivered 240V, but the local grid operated at 480V. Their spec didn’t call for isolation, so a self-cooled 750 kVA auto transformer was the right move.
We configured it for bottom cable entry and tight panel spacing. The local team got it online in under a day.
Data Center – Dublin, Ireland
An Irish data center was upgrading racks from 415V to 480V but wanted to keep their existing UPS infrastructure. Isolation wasn’t needed—compatibility was.
We supplied a 750 kVA three-phase auto transformer, set up for a Y-Y configuration to keep the system neutral undisturbed. It’s now running quietly in their UPS bypass channel.
Wind-to-Hydrogen – Lyon, France
On a wind-to-hydrogen pilot line outside Lyon, a 415V output from VFDs had to feed 480V-rated electrolyzers. The grounding system was shared, so isolation was off the table.
Our dry-type 750 kVA auto transformer handled the voltage bump with minimal footprint. The customer appreciated the fact it came tested, labeled, and ready to drop in.
Medical – Milan, Italy
A hospital in Milan added a new HVAC system requiring 480V, but their building only provided 240V. They didn’t want to overhaul the switchgear or add extra cabinets.
We delivered a 750 kVA auto transformer with front-facing terminals and a slim housing. Their maintenance team wired it straight into the existing panel—it’s still running without a hiccup.
- Data Sheet
- Three Phase Transformer Catalog
- Shinenergy Product Catalog
| Certification | UL |
| Phase | Three Phase |
| Rated capacity | UP TO 3000KVA Customized |
| Frequency | 50/60Hz |
| Work Efficiency | UP TO 99.05% |
| Protection Class | IP00/IP20/IP23/IP40/IP44/IP54 |
| Winding Material | Copper or Aluminum |
| Insulation level | Class F (155°C) Class H (180°C) Class N (200°C) Class R (220°C) |
| Designed lifetime | ≥30 years |
| Cooling Method | Air Cooling |
| Wiring Configuration | Δ-Y (Delta-Star)/Y-Y (Star-Star)/Δ-Δ (Delta-Delta)/Y-Δ (Star-Delta) /Δ-Z (Delta-Zigzag)/ Y-Z (Star-Zigzag) |
| Noise | ≤35 dB (1 meter) |
| Three Phase Transformer Catalog | |
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| 150 kva 480 3 phase to 120 single phase transformer | 100 kva 480v to 220v 3 phase transformer |
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| 100 kva step up transformer 220 to 440 3 phase | 100 kva step down transformer 480 to 240 3 phase |
⚡ A Smarter Way to Shift Voltage on 3 Phase Systems
Need to boost or drop voltage inside your system, but don’t want to install a bulky isolation transformer? That’s where a 3 phase auto transformer makes the most sense. Same core power, smaller footprint, and better efficiency.
We’ve built everything from auto transformer starters for 3-phase induction motors to fully enclosed 750 kVA dry-type builds. Whether you need top-entry terminals, adjustable taps, or custom circuit diagrams, we’ve done it—and we’ll make it easy to install.
Every unit ships tested, labeled, and with wiring diagrams in PDF. Just give us your voltage spec—we’ll handle the rest.
Yes—every unit includes a 3 phase auto transformer wiring diagram, clearly labeled for input, output, taps, and ground. If your panel has space constraints, we’ll adjust the layout to match.
Absolutely. Whether it’s star-star, delta-star, or custom dual-voltage, we’ll confirm the auto transformer connection setup during quoting so your install goes clean.
Yes—we’ve built auto transformer starters for 3-phase induction motors, typically for soft starting larger loads with voltage step-up. Just tell us your motor specs and start-up conditions.
Yes. With every order, we send a full set of drawings in PDF—circuit diagram, connection view, and label maps. You can forward them directly to your installer or panel builder.
That depends on size, material (copper or aluminum), insulation level, and accessories. For a 750 kVA dry-type auto transformer, you’re typically looking at mid-four figures, including testing.
Sure—but in short: it adjusts voltage by sharing windings between input and output. No full isolation, just clean, efficient voltage control. If you need a deeper working principle, we’ll send a 1-page tech brief.