VIENERGY | Transformer

What we do best

Transformers built for
reliability and lifecycle value

We deliver transformers that safeguard uptime and grid stability. Each unit is engineered to minimize energy loss, extend service life, and meet evolving safety and environmental standards. By focusing on predictable performance, we help clients lower total cost of ownership and ensure dependable power supply across decades.

Custom-engineered transformers 
for every application

From distribution pads to utility-scale power transformers, our portfolio covers the full spectrum of voltage classes. We offer engineer-to-order flexibility, advanced testing, and seamless logistics integration to match the specific needs of EPC projects. Clients benefit from equipment that is certified, bankable, and ready for immediate deployment.

Pole mounted  Transformer

Compact distribution transformers for overhead lines—ideal for rural and suburban feeders. Available with CSP options (internal fusing, surge protection, pressure relief) to minimize outage risk.

Mineral or natural-ester fluids, wildlife guards, and corrosion-resistant tanks enhance safety and extend service life. Units comply with applicable ANSI/IEEE/CSA efficiency and dielectric standards, with factory routine tests and optional site acceptance testing.

- Phase: Single
- Frequency: 50Hz / 60Hz
- Capacity: 10-500kVA
- High Voltage: ~ 34.5kV
- Core: Silicon Steel / Amorphous
- Winding: Copper / Aluminum
- Standard: IEC, ANSI, NEMA, CSA

Pad mounted  Transformer

Tamper-proof, ground-mounted transformers for underground networks and urban loads. Dead-front/live-front, radial or loop-feed with load-break switches and bayonet/ELSP fusing enable safe operations and fast isolation.

Natural-ester options for fire/environmental performance; stainless hardware and NEMA 3R enclosures for harsh sites. Designed for utility interconnection and commercial campuses with clear cable access and arc-flash-aware layouts.

- Phase: Single / Three Phase
- Frequency: 50Hz / 60Hz
- Capacity: ~ 2,500kVA
- High Voltage: ~ 34.5kV
- Winding: Copper / Aluminum
- Standard: IEC, ANSI, NEMA, CSA

Dry Transformer

Dry-type transformers for buildings, tunnels, and industrial plants where fire load and moisture resistance matter. VPI and cast-resin designs offer low smoke/toxicity, high short-circuit strength, and minimal maintenance.

Options include K-factor windings for non-linear loads, low-noise cores, IP/NEMA enclosures, and corrosion protection for coastal sites. Complies with UL/CSA and IEEE/IEC dry-type standards; factory heat-run and impulse tests available.

Power Transformer

High-reliability power-class transformers for substations and generation tie-ins. Engineered with ONAN/ONAF/ODAF cooling, high-BIL insulation systems, LTC/DETC tap changers, and online monitoring (DGA, moisture, bushing health).

Designs meet DOE/NRCan efficiency and IEEE/IEC/CSA standards. Delivered with transport studies, factory acceptance tests, and site commissioning to accelerate energization and reduce lifetime losses and noise.

- Phase: Single / Three Phase
- Frequency: 50Hz / 60Hz
- Capacity: 1,000 - 30,000kVA
- High Voltage: ~ 72kV
- Cooling: ONAN / ONAF / OFAF
- Standard: IEC, ANSI, NEMA, CSA

AutoTransformer

Cost- and footprint-efficient transformers for interconnecting transmission systems with close voltage ratios (e.g., 230/345 kV). Ideal for bulk power transfer, grid reinforcement, and generator step-up/step-down where regulation is required.

Optional tertiary windings support system stability and reactive compensation; neutral-grounding and protection schemes are integrated. Built to IEEE/IEC/CSA with full routine/type tests and tailored transport/installation plans.

- Phase: Single
- Frequency: 50Hz / 60Hz
- Capacity: 5,000 - 30,000kVA
- High Voltage: ~ 72kV
- Cooling: ONAN / ONAF
- Standard: IEC, ANSI, NEMA, CSA

We deliver infrastructure that performs — from first concept to final energization. Our teams combine EPC depth, equipment integration, and data-driven control to turn complexity into predictable results.

Let’s connect and build what lasts.

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