| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in that a system-side breaker can not be turned off manually at power failure or voltage drop to carry out self-support operation in conventional system interconnection inverters. SOLUTION: In this system interconnection inverter, when voltage drop or power failure of a system 11 is detected by a power failure detection means 36, a system-switching relay 35 is opened by a control means 13, and a system relay 9 and a self-support relay 30 are closed for supplying the output of a full-bridge inverter 6 to a receptacle 31 for self-supporting operation, thus automatically enabling self-supporting operation. |
