Toroidal current transformers are power transformers containing a toroidal core upon which the secondary and primary coils are wound. These current transformers obtain their name from the donut like shape. The transformer consists of a circular magnetic core around which wires wrapped. They are used in numerous AC electronic circuits. Therefore, there is no difference between a Toroidal and donut transformer, with both terms referring to the same device.
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Toroidal transformers are used in electronic applications that step up or down a voltage or for the isolation of electronic equipment from a source of voltage. Different transformers are used for different applications. It is important to be careful in choosing the right transformer unit for your requirements. At Midwest Current Transformer, we offer toroidal transformers (CT) for a wide range of power applications.