| 摘要 |
PROBLEM TO BE SOLVED: To provide a direct-current link device that is safe and efficient to use. SOLUTION: The direct-current link device includes a system input terminal, a direct-current power input terminal, an output terminal for load, a direct- current linkage portion, an AC-DC converter that is fed as input with alternating-current power through the system input terminal and outputs direct- current power to the direct-current linkage portion, and a DC-AC inverter is fed as input with direct-current power from the direct-current link portion and supplies the output terminal for load with power. The direct-current link device is also provided with an output select switch arranged between the DC-AC inverter and the output terminal for load, a bypass circuit that connects the system input terminal direct to the output select switch, a control device that controls the output select switch, and a direct-current power detector, that detects presence/absence of direct-current power inputted to the direct- current power input terminal. The control device controls the output select switch, based on information outputted from the direct-current power detector. |
