What are the types of Transformer?

What are the types of Transformer?

 Types of instrument transformer:

Two types of instrument transformer are there.

1. Current transformer (CT)

2. Potential transformer (PT/VT)

CURRENT TRANSFORMER:

Current transformer is an instrument transformer in which the secondary current in normal conditions of use is substantially proportional to the primary current and differs in phase from it by an angle which is approximately zero for an appropriate direction of connections. The core manufacturer It should be noted that in case of CT and PT that if one stepped down the another will get stepped up.

All current transformers operate on the principal of ampere turn balance in a closed magnetic circuit. 

The CT consists of a primary winding of Np turns and secondary of Ns turns carrying current Ip and Is respectively. A component of the primary ampere turns is utilized in magnetising the core with the result that ampere turns available for transformation is the vector differ of primary and exciting ampere turns the exciting ampere turns give rise to error in CT.

POTENTIAL TRANSFORMER :

 Potential Transformer is designed for monitoring single-phase and three-phase power line voltages in power metering applications.
 The primary terminals can be connected either in line-to-line or in line-to-neutral configuration. Fused transformer models are designated by a suffix of "F" for one fuse or "FF" for two fuses.

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