The Current Transformer
The Current Transformer ( C.T. ), is a type of “instrument transformer”
It designed to produce an alternating current in its secondary winding which is proportional to the current being measured in its primary.
Current transformers reduce high voltage currents to a much lower value.
It provide a convenient way of safely monitoring the actual electrical current flowing in an AC transmission line using a standard ammeter.
The principal of operation of a basic current transformer is slightly different from that of an ordinary voltage transformer.
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