| 摘要 |
PURPOSE:To restart feeding manually after recovery from the failure is confirmed in case of a failure recovery and to allow the feeding automatically by the recovery of an input power source in the event of a voltage input break by connecting an automatic feeding start switch circuit to the contact of a feeding output relay in parallel. CONSTITUTION:A repeating transmission line 6 is fed through a feeding output relay 3 which is operated by a feeding current inserted in series to the output of a feeding power source circuit 2 and operating contacts 4 of the relay 3. Further, the automatic feeding start switch circuit 9 is connected in parallel to the operating contacts 4. Further, the serial circuit of a delay circuit 7 and an input power source detecting circuit 8 is connected in parallel to the power source circuit 2 and the switch circuit 9 is opened by the output of the circuit 8. The switch circuit 9 is closed normally and the output of the circuit 8 is opened after the relay 3 operates; when a fault occurring to the transmission line 6 causes a feeding break, the feeding is restarted by a manual feeding start switch 5 and when an input power source break occurs, the feeding is restarted once the input power source recovers. |
