Why the secondary winding of CT should not be kept open circuited.

Question

Accepted Answer

The secondary winding of a CT should not be kept open circuited because it can cause high voltage and damage the CT.

An open-circuited secondary winding can lead to a high voltage across the winding, which can damage the CT.
The secondary winding of a CT is designed to have a specific impedance to ensure accurate current measurement. Keeping it open-circuited disrupts this impedance.
An open-circuited secondary winding can also result in inaccurate current measurements.
If the secondary winding is open-circuited, the CT may not provide any output signal.
To avoid damage and ensure accurate measurements, the secondary winding of a CT should always be connected to a load or short-circuited.

Accepted Answer

Because the open circuit secondary voltage of ct is very high which causes verry high iron lossesin ct which may burn ct.

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