| 摘要 |
PURPOSE:To suppress a hunting without increase in capacity, without stop in operation by temporarily increasing an impedance of a circuit when the hunting is detected, and simultaneously instructing an output drop to an inverter. CONSTITUTION:A hunting preventing device 10 has an interlocking impedance 4, an inserted reactor 11, an AC breaker 12, an inverter detector 13, and a hunting detector 14. If a control hunting occurs, it is sensed by the detector 14, the breaker 12 is opened, and a control hunting is suppressed by the reactor 11. A signal 14S for instructing the drop of an output current from the detector 14 is input to an inverter 2, and the inverter 2 reduces the output current. If the hunting current component in the detector 13 is reduced to a predetermined level or lower, the inverter 2 is reset to a normal operation. |
