Withstand voltage test platform for composite apparatus

The utility model relates to a withstand voltage test platform for a combined electric appliance, which comprises a tool sleeve, a first isolating switch, a three-way assembly, a second isolating switch and a full-closed power frequency test complete device which are connected in sequence, and one interface of the three-way assembly is connected with a third isolating switch serving as an expansion interface. The totally-enclosed power frequency test complete device comprises an isolation impedance connected with the second isolation switch, a capacitive voltage divider and a coupling capacitor which are connected with the isolation impedance, and a test transformer connected with the capacitive voltage divider. According to the utility model, during a lightning impulse test, the first isolation switch is switched on, the second isolation switch is switched off, and then voltage is applied from the tool sleeve, so that the lightning impulse test is completed; during a power frequency withstand voltage test an