| 摘要 |
PURPOSE: To provide a water feeding device reducing a fear of stopping of water feed. CONSTITUTION: In a water feeding device comprising a plurality of inverter devices 200 and 220 having a protection function; a plurality of motors 401 and 402 to perform variable speed operation by a feed from the inverter devices; and a plurality of pumps 411 and 412, a pump control device 300 is provided with a restarting means to return a stopped inverter device to an operation state is arranged at during the stop of operation of the inverter devices 200 and 220. A source switching circuit 350 is arranged between the motors 401 and 402 between the outputs of the inverter devices 200 and 220 and the inputs of the motors 401 and 402. When the inverter devices 200 and 220 are stopped, the starting of a stop inverter device is repeated at least two times by a restarting means, and the source switching circuit 350 switches the output of the inverter to a normal motor when abnormality occurs to the motors 401 and 402 or the pumps 411 and 412. |
