What is a DC transformer?

A DC transformer in this case refers to the traditional 50/60 Hz three phase transformer used for many years for high power requirement. These low frequency transformers are high power machines capable of long duty cycles. These tend to be large transformers due to their power ratings and applications.

DC Transformer



Typical applications are large ring projections, flash-butt and rim welding.


This class of transformer can deliver outputs up to:

Secondary Amperage: 1 KA up to 1000 KA

KVA Range: 10 to 3000 KVA

Secondary Voltages: 0.5 - 50 V

Primary Input: 200- 800 V

Frequency: 50/60 Hz


References: RWMA Resistance Welding Manual- 4th Edition
                    Roman Manufacturing Inc.

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