In the operation of the current transformer (CT) in the secondary loop must not be allowed to open, once the open, or a winding through the abnormal current (such as lightning current and harmonic current, capacitance charging current, inductance starting current, etc.), will have thousands to tens of thousands of volts open overvoltage, CT and secondary equipment damage, also a serious threat to personal safety, caused great economic losses. The use of current transformer secondary overvoltage protector (CTB) can effectively prevent accidents caused by abnormal high voltage on the secondary side of current transformer.

ACTB manufactured by our company is mainly used for abnormal overvoltage protection of the secondary side of CT, and the secondary side of the sensor is approximately short in normal operation. In circuit state, the output voltage is very low. Once abnormal peak overvoltage occurs in CT secondary open circuit, it can immediately respond to voltage limit and delay short circuit, thus playing a complete protection role. The panel shows the fault part, and whether there is source signal output. When the fault is eliminated, the circuit returns to its normal state and works normally again.