Large-current arc test device

The embodiment of the invention provides a large-current arc test device, which can solve the problem that the power of a power supply required by an internal arc fault test of current high-voltage power equipment is too large. The device comprises a control detection unit which is used for detecting an electric arc current zero crossing point electric signal generated in the process of carrying out an internal arc fault test on equipment to be tested, and generating a discharge signal when the electric arc current zero crossing point electric signal is detected; the pulse high-voltage supply unit is connected with the control detection unit and is used for providing a high-voltage pulse for the equipment to be detected under the condition that the discharge signal is received; and the power supply unit is used for providing arc current for the to-be-tested equipment and providing electric energy for the pulse high-voltage supply unit. The device can provide high-voltage pulses to the to-be-tested equipment t