| 摘要 |
<p>PURPOSE:To provide a power source control circuit which automatically control making/breaking of a power source, where a control circuit which automatically puts back a power source into an operation state before a service interruption even if the service interruption and recovery from it occur irrelevantly to whether or not a UPS is connected and a control circuit which makes the power source after the recovery from the service interruption even if a calender power-ON time comes during the service interruption are realized by the user of simple circuits and software processing. CONSTITUTION:The circuit is equipped with a control circuit 1 which suppresses the reclosing of a power source even if the recovery from a service interruption takes place when a stand-by flag is ON and sends out a PWR-ON signal for performing reclosing when the stand-by flag is OFF, AC electric power is being supplied in a non-service interruption state, and a closing trigger signal is ON; when a PWR-OFF request signal is inputted and the stand-by flag is turned on an indication is further sent to a calender mechanism 3 only at the time of service interruption and an ON signal is supplied to the standby flag a specific time later to turn off the flag, thereby turning on the power source when the recovery from the service interruption takes place.</p> |
