Direct current contactor carries in area and divides disconnected protection circuit and coach air conditioner control system

The utility model provides a direct current contactor carries in area and divides disconnected protection circuit and coach air conditioner control system, direct current contactor concatenates the feeder ear at the converter, and direct current contactor is including being connected to low pressure power supply's control coil, the protection circuit includes voltage detection unit and communication unit, wherein: the both ends at direct current contactor's control coil are connected to voltage detection unit's input to being less than appointed threshold value, input voltage produce triggering signal when, the input of communication unit is connected to voltage detection unit's output, and stop signal to converter was exported to the output of this communication unit when triggering signal was received to the input of this communication unit. The utility model discloses a real -time detection direct current contactor's control coil both ends voltage to be less than appointed threshold value messenger at dete