Power Current Transformer wiring principles and precautions for use

Wiring principle of Power Current Transformer

1. No open circuit is allowed. The secondary open circuit can easily lead to safety accidents, because the secondary open circuit will cause the iron core to overheat and induce high voltage.

2. There must be a little grounding. When the Power Current Transformer is measured as high voltage, if there is one point of grounding, high voltage can be introduced into the earth, but pay attention to two points of grounding to avoid shunting.

3. The protection level and measurement level of Power Current Transformer can not be connected wrongly. Once the two are connected incorrectly, it may lead to insensitive relay protection and inaccurate energy measurement.

4. Unused windings need to be short-circuited so as not to affect the measurement accuracy, but the Power Current Transformer has multiple taps, and unused taps need to be short-circuited.

Precautions for using Power Current Transformer

1. Generally speaking, the connection of the Power Current Transformer is connected according to the minus polarity, so the polarity connection must be correct. Once the connection is wrong, the measurement will be inaccurate and even short-circuited.

2. Power Current Transformer company should set a protective grounding point in order to prevent the secondary winding from causing high-voltage electricity to flee into the low-voltage side, causing damage to the instrument and causing personal injury.

3. For transformers that use electric energy measurement, if the secondary circuit is implemented, no automatic device is required.