Excitation loop for preventing mistaken switching of excitation rectifier during separate excitation

The utility model discloses an excitation loop for preventing mistaken switching of an excitation rectifier during separate excitation. The excitation loop comprises an excitation alternating currentpower supply, the excitation rectifier, an excitation contactor K1, an excitation follow current resistor R, an excitation contactor K2 and an excitation loop fuse. Wherein the excitation alternatingcurrent power supply is connected with the excitation rectifier and used for supplying power to the excitation rectifier, the excitation rectifier is connected with the excitation contactor K1, the excitation contactor K1 is connected with the excitation follow current resistor R in parallel and then connected with the excitation contactor K2, and the excitation contactor K2 is connected with theexcitation loop fuse. According to the loop of the utility model, the excitation contactor K1 is added between the excitation rectifier and the excitation freewheeling resistor R. Therefore, the connection between the excitatio