SECONDARY OPEN-CIRCUIT PROTECTOR FOR AC MUTUAL-INDUCTOR

The utility model discloses a secondary open-circuit protector for an ac mutual inductor. A zinc oxide (electricity) voltage-sensitive resistor has good voltage-sensitive characteristic, and the protector manufactured by the zinc oxide (electricity) voltage-sensitive resistor is connected to a secondary outlet end of the ac current transformer in parallel; when the ac mutual inductor is in the normal running, the passing current is minimum, and the normal working can not be affected; when the high voltage is inducted at the outlet end of the secondary open circuit, the secondary open-circuit protector for the ac mutual inductor can discharge electricity to suppress the voltage of the secondary outlet, and the device and the personal safety can be protected. The utility model has the advantages of simplicity, reliability, good protecting effect, low cost, and convenient use and generalization.