How to deal with Power Current Transformer error

(1) Increase the cross-sectional area of the secondary cable or reduce the length of the cable. Increasing the cross-sectional area of the secondary cable of the current loop or reducing the length of the cable actually reduces the impedance of the secondary loop wire and reduces the secondary load.

(2) Connect the secondary coil of the standby Power Current Transformer in series to double the load. The secondary coils of two in-phase Power Current Transformers with the same transformation ratio and the same characteristics are used in series.

(3) Increase the transformation ratio of the Power Current Transformer or use a Power Current Transformer with a secondary rated current of 1A. According to the principle that the loss of the line is proportional to the square of the current, it can be seen that the loss of the line becomes smaller and the output impedance becomes larger, so the load carrying capacity is strengthened.

(4) Reduce the secondary load. Choose a relay with a large setting current as much as possible, because the wire diameter of the relay coil with a large setting current is thick and the number of turns is small, so the impedance is also small; or change the series connection of the relay coil to a parallel connection, because the impedance of the series connection The impedance is larger than the parallel connection; or use a microcomputer protection device to replace the electromagnetic relay.