| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that when a system output voltage generated in a power conversion unit is output to a load on self-supported output terminal side, the load is damaged by a fault in the circuit breaker used for self-supported output, and that if a power supply is erroneously connected to the self-supported output terminal, the power conversion unit is broken. <P>SOLUTION: A utility connected power conversion device 30 comprises a power conversion unit 40, a first circuit breaker 71 on a utility grid 101 side, a self-supported output second circuit breaker 72 on a load 102 side, a voltage detection unit 80, and a control unit 90. The output side voltage of the second circuit breaker 72 is detected by the voltage detection unit 80. When, while a second off signal S2b is output from the control unit 90, a voltage presence detected signal S80a output from the voltage detection unit 80 is input to the control unit 90, the control unit 90 causes the power conversion unit 40 to stop its operation. Furthermore, if a power supply is erroneously connected to a self-supported terminal 33, operation of the power conversion unit 40 is stopped. <P>COPYRIGHT: (C)2013,JPO&INPIT |
