Transformer Guides

European Voltage Transformers Need 380, 400, or 415 Volt output? See our simple European Voltage Transformer selection guide to determine the best fit for your application.		Buck Boost Transformers Buck Boost Transformers are an inexpensive way to increase or decrease your voltage a small amount. Answers to common questions and sizing help available.		Single Phase Control Transformers Thousands of control transformers in all configurations. 1 week build time. View our full selection guide here.
Three Phase Control Transformers Thousands of control transformers from 350 to 9000 VA. 1-3 week build time. View our full selection guide here.		Small kVA 3 Phase Transformers View our selection of 350 to 9000 VA Three Phase Transformers with European voltage outputs.		Medium Voltage Control Transformers Medium voltage control transformers for supplying power to control circuit in electrical panels.
Medium Voltage Transformers Distribution Transformers, 1 and 3 Phase. 10 to 1000 kVA.		Autotransformers Autotransformers, 1 and 3 phase. 3 to 100 kVA.		Single Phase Isolation Transformers Thousands of 1 phase transformers in all configurations. View the full line here.
Three Phase Isolation Transformers Thousands of 3 phase transformers in all configurations. View the full line here.

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General Information

Transformer Technical Terms Glossary

What is a Transformer?
What is a transformer and how does it change voltage? Overview of the construction and electrical principles of transformers.

Selecting a Transformer
A guide to understanding how to size a single or three phase transformer.

Transformer Types
Autotransformers, Buck Boost, Control, Isolation/Distribution, Harmonic Mitigating/K-factor, Drive Isolation, Low Voltage Lightning, PDUs, and Variable Transformers.

Special Transformer Configurations (How-to)
A how-to guide for special transformer applications. Banking, frequency rating converns, zig zag autotransformers, calculating 3 phase unbalanced loads, using 3 phase transformers in phase of 1 phase transformers, and more.

Transformer Technical FAQ
Answers to all your common technical questions on transformers.