| 摘要 |
PROBLEM TO BE SOLVED: To obtain a system interconnecting inverter apparatus, which restrains an overcurrent and which is hard to be stopped with reference to a change in a system by a method, by making an inverter stop for about 2 msec when the overcurrent is generated due to changes in the system. SOLUTION: By using a control means 8, a current monitor 12 sets a detection-level setting circuit 13 within 2 msec, before and after a system-voltage detection means 11 detects zero voltage. At this time, when a higher state is generated, drive of a switching element for an inverter is stopped for the time period which is decided by a timer circuit 15, for about 2 msec in this case, and an overcurrent is suppressed. |
