Broken line protection circuit of three-phase power supply

The utility model discloses a disconnection protection circuit of a three-phase power supply. The disconnection protection circuit comprises a first phase line, a second phase line and a third phase line, the disconnection protection module comprises a first relay, a second relay, a third relay and a power supply, the first relay is arranged on a first phase line, the second relay is arranged on a second phase line, and the third relay is arranged on a third phase line; one end of the power supply is connected with any two of the first phase line, the second phase line and the third phase line, and the other end of the power supply is connected with the first relay, the second relay and the third relay. According to the utility model, the problems of power consumption and easy short circuit caused by continuous on-state of all power supplies are solved. 本实用新型公开了一种三相电源的断线保护电路，包括：第一相线、第二相线和第三相线；至少一个断线保护模块，所述断线保护模块包括：第一继电器、第二继电器、第三继电器和电源，所述第一继电器设于第一相线，所述第二继电器设于所述第二相线，所述第三继电器设于所述第三相线；所述电源的一端连接第一相线、第二相线和第三相线中的任意两者