Patent ID: 11955839
Assignee: ANHUI DYNAMIC POWER CO., LTD
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 6:
7. The dual-input circuit according to claim 1, wherein: when only the first input voltage has a normal voltage and the second input voltage has no normal voltage, the first input voltage is connected to an output of the contactor, and the second input voltage is isolated from the output of the contactor and the first input voltage due to disconnection of a group of contacts corresponding to the second input voltage; or when only the second input voltage has a normal voltage and the first input voltage has no normal voltage, the second input voltage is connected to the output of the contactor, and the first input voltage is isolated from the output of the contactor and the second input voltage due to disconnection of a group of contacts corresponding to the first input voltage; or when both the first input voltage and the second input voltage have normal voltages, a main input thereof is connected to the output of the contactor, and a backup input thereof is isolated from a circuit of the output of the contactor and a voltage of the main input due to disconnection of a group of contacts corresponding to the backup input; when the voltage of the main input deteriorates, the dual-input control circuit sends a control signal to drive the contactor to switch, to connect the backup input to the output of the contactor; and only one of the first input voltage and the second input voltage is connected to the key power circuit at any moment.