Four branching combined overvoltage protector

The utility model relates to an overvoltage protection device, namely, a novel four branch circuit combined overvoltage protector. The utility model is characterized in that protective devices in protective branch circuits which are connected with an earth wire G in four protective branch circuits are only composed of zinc oxide nonlinear resistors; the direct current 1mA reference voltage value of the zinc oxide nonlinear resistor which is connected with the earth wire G and arranged in the protective branch circuit is 0 to 1 times greater than the direct current 1mA reference voltage value of zinc oxide nonlinear resistors in other three protective branch circuits; the parameters of the protective devices which are arranged in the three protective branch circuits and connected with an A phase line, a B phase line and a C phase line of the protected device are the same. The utility model can effectively eliminate the influence of stray capacitance on the voltage distribution of the return circuit of the protector. The utility model has the advantages of constant voltage values of industrial frequency discharge and long service life. The production process can be simplified, and the cost can be reduced.