Electrical Transformers
Wistex offers a full range of industrial transformers engineered to improve power quality, protect sensitive equipment, and ensure safe, reliable voltage control. Whether you need to step voltage up or down, isolate circuits, or fine-tune voltage levels, our UL-listed units meet NEC standards and ship within 24 hours. To maintain OSHA lock-out/tag-out compliance during maintenance or servicing, pair your transformer with a proper disconnect switch. We stock popular kVA sizes and support you with expert guidance through every step.
Transformer Types We Stock
Explore our most common transformer configurations, available in both dry-type and rugged enclosures for a variety of environments.
Control Transformers
Designed for machine tools, relays, and panelboards, control transformers deliver stable voltage to industrial control circuits and keep sensitive equipment running smoothly.
Buck-Boost Transformers
Buck-boost transformers are an energy-efficient way to correct minor over- or under-voltage issues. These compact units offer reliable voltage adjustments for lighting, motor loads, and more without the cost of a full-size transformer.
Isolation Transformers
Use isolation transformers to reduce electrical noise, safeguard critical devices, and prevent ground loops. Ideal for clean power applications in telecom, medical, and IT environments.
Common Transformer Applications
Our industrial transformers are used across a wide range of commercial and manufacturing applications, including:
- CNC machines
- HVAC controls
- lighting
- telecom gear
Why Choose Wistex for Transformers
At Wistex, you'll find top-tier industrial transformers, unmatched product knowledge, and personalized service. Our team helps you choose the right kVA, phase, and enclosure (including NEMA 3R and NEMA 4 options). We stock premium brands, offer same-day quotes, and ship fast so your project stays on schedule.
Transformer FAQs
Get answers to common questions about selecting and installing transformers.
To size a control transformer, calculate the total VA (volt-amperes) load of connected components and apply the 80% loading rule to ensure continuous operation. Always round up to the nearest available size.
A buck-boost transformer offers an affordable solution for small voltage corrections, which are ideal when you need to adjust incoming voltage by 5-20%. These units are compact, efficient, and cost less than larger isolation or control transformers.
Yes. OSHA and NEC require a means of disconnect for transformer maintenance and lock-out/tag-out compliance. Consider pairing your transformer with a proper disconnect switch to stay compliant and safe.