Protection device for output end of generator car DC600V rectifier cabinet

The invention relates to a protection device for an output end of a generator car DC600V rectifier cabinet. The protection device comprises a DC600V rectifier module, an isolating switch, a current transformer, a direct current ammeter, a direct current voltmeter, an auxiliary contact mounting module, a green indicator lamp, a red indicator lamp and a direct current air switch, wherein the DC600V rectifier module comprises power electrical input end and output end; the isolating switch comprises a direct current load connecting positive wire cable and a direct current load connecting negative wire cable; the current transformer comprises a current transformer primary winding and a current transformer secondary winding; the auxiliary contact mounting module comprises a normally open contact, a normally closed contact, a normally open contact connecting cable and a normally closed contact connecting cable; when power is provided for a passenger vehicle by a locomotive or ground power supply, external power input can be completely cut off by only manually cutting off the isolating switch, and the DC600V rectifier module is protected from current shock.