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Current transformers (CT) :

  • Current transformer (CT) actually step down the high current to low current for the operation of relays.
  • Current transformer is use for measurement of alternating current (AC).
  • When current is very high then we use current transformer.
  • Current transformer is use for monitoring current .
  • When we use current transformer with potential (voltage) transformer then it is known as instrumentation transformer.
  • Current transformer (CT) is also useful for isolating instruments from high voltage.

This is about current transformer (CT).

Potential (voltage) transformer :

  • Potential transformer is also known as voltage transformer.
  • The principle of potential transformer is similar to current transformer.
  • Potential transformer is the step down transformer which step down voltage.
  • Potential transformer may also use for monitoring voltage.
  • The low voltage output of potential transformer can be use for relay.

This is about potential transformer.
commented by
Their use in protective system?? Not general use
commented by
Yeah, for lowering of voltage and current for operation of relay. Relay are use for protective system.

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