| 摘要 |
PURPOSE: To improve the reliability and maintainability of a power system by preventing an accident and misoperation at the time of making and disconnection of the power by a service engineer when a power module of the parallel redundant power unit is repaired on-line. CONSTITUTION: The input electric power 10 of the parallel redundant device is inputted to parallel redundant modules 3A-3N through relay contacts 1A-1N connected to input lines 2A-2N. Alarm signals of the parallel redundant modules 3A-3N are connected to relay coil parts 5A-5N and a diode through an alarm signal line 6. Those relays make the relay contacts 1A-1N be connected so as to turn on the input when the parallel redundant modules 3 are normal, but if one module is shut down, its alarm signal is inputted to the relay coil part 5 to automatically turn off the input. |
