| 摘要 |
PURPOSE: To house an outside controller and relay circuit part in an inverter for miniaturizing, simplifying and reducing cost of them. CONSTITUTION: A complete double system is constituted of first and second leak circuit breakers ELB1, ELB2, inverters INB1, INB2, motors 5-1, 5-2 and pumps 4-1, 4-2. The inverters INV1, INV2 are connected to each other through a signal line for transmitting failure and running condition signals, and a signal line of a sensor unit is connected directly to the inverter. Thus, an advanced controller and relay circuit unit are not needed in the outside. The system is simplified, miniaturized and lightened, cost reduction is realized, the number of part item is reduced and the reliability is improved. |
