Testing apparatus for power frequency freewheeling blocking capability of lightning protection apparatus

The utility model relates to a testing apparatus for a power frequency freewheeling blocking capability of a lightning protection apparatus. The testing apparatus consists of a power frequency oscillation loop, a high-voltage impact circuit, a sampling resistor, a voltage divider, a current-limiting element, a fixed insulation board, a moving insulation board and a sliding bar. The power frequency oscillation loop is composed of a power frequency inductor, a first sphere gap, and a power frequency capacitor, wherein the components are successively connected; and the high-voltage impact circuit includes a waveform regulator, a second sphere gap, and an impact capacitor, wherein the components are successively connected. The power frequency inductor of the power frequency oscillation loop, the high-voltage impact circuit, and the voltage divider are respectively connected in parallel with two access terminals; and one access terminal is also connected in series with the sampling resistor. The moving insulation board and the fixed insulation board are respectively connected with sphere electrodes of the first sphere gap and the second sphere gap; and the current-limiting element is arranged between the power frequency oscillation loop and the high-voltage impact circuit. The access terminals are ones connected with a to-be-tested lightning protection apparatus. According to the technical scheme, the test success rate can be improved.