What are the different types of Current Transformers?

Step up transformer

step down transformer

1. the single-turn (bar) primary and 
2. the multi-turn wound primary.

There are three basic types of current transformer: wound, toroidal and bar.

A current transformer (CT) is a transformer that is used to produce an alternating current (AC) in its secondary which is proportional to the AC current in its primary. Current transformers, together with voltage transformers (VTs) or potential transformers (PTs), which are designed for measurement, are known as instrument transformers.

The Current Transformer ( C.T. ), is a type of “instrument transformer” that is 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 and 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.

So There are three basic types of current transformers: wound, toroidal and bar.

Current transformer is also called instruments transformer.mainly transformer is of two types according to working principle that is 1.Step Up 2.Step down transformer.since current is same in both primary and secondary side that is I1=I2 but voltage is different depends upon number of winding. there is three basic types of transformer Wound,Toroidal and Bar type current transformer.