Tuesday, April 28, 2020

GETTING STARTED WITH ROUTE RELAY INTERLOCKING - PART 7

BUTTON RELAY

4) SIGNAL FAIL ALARM CIRCUIT
    OR
    Signal Lamp Failure Acknowledgement Button Relay (GXACKNR)



- If any signal become blank, GXR drops, which activate the signal failure buzzer and light up the signal failure indication on the panel.



- The SM acknowledge by pressing signal lamp failure ACK button thereby signal lamp failure acknowledgement button relay(GXACKNR) energizes.

Step 1

 Step 2




- Thereby the buzzer stop ,but the indication remains ON till the lamp is 
  replaced or the fault is rectified by S&T personal.



- GXR is made slow to release there by it does not drop during aspect changing 
  period and give false alarm.



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