Signal in railway, how many voltage and current require to lit a signal (pdf)

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Image of a home signal with route signal and calling on signal

Signal:- A signal is that thing which convey information about a track or road on which a vehicle redy to pass

Types :- On the basis of their existence and working there are mainly three types .

1- Main signal

2-subsidery signal

3- Auxiliary signal

         image of a shunt signal                               (subsidery signal)

        image of a advance stater

                (Main signal )    

Explanation :-  For lit a main signals i.e Home ,stater ,advance stater ,inner distance ,distance ,  ibs etc .

Require voltage - 90 v to 110 v a.c

Require current - 130 ma 

Fuse - glass fuse -630 ma

For subsidary signal 

SHUNT SIGNAL  ;- It is subsidary signal .It can place dependent or independent .Some signala are used as only  STOP SIGNAL .

Parameter ;-

Voltage -110 v ac

Current - 60 ma


 The name of  led of a shunt   signal are as ON ,OFF ,PIOLET 

Note - The arrow marks which show on which line a shunting work can process .It is always left to right .

image of a shunt signal

Necessary path followed according to circuit .


HR ^ HPR^  FOR ATTENTION OR  CAUTION  ( Yellow aspect )

DR ^DPR^ FOR CLEAR ASPECT      

( Green aspect )

And the most restrictive aspect is  RED .

ECR :- LAMP CHECKING RELAY , IT PICKS UP WHEN LED OF A COLOUR LIGHT SOGNAL IS LIT .

Ecr relay is picked up by current but not by voltage .


Note :- A train cannot be pass a aignal in danger without failure of signal or special condition .

SPAD - FULL FORM -signal pass at danger .

Cable require - 12 core or 18 core for main and 6 core for tail cable .

Here , MAIN CABLE MEANS THAT CABLE WHICH COMES FROM RELAY ROOM OR GOOMTY


BUT ,TAIL CABLE FINALLY GO TO SIGNAL CURRENT REGULATOR FROM LOCATION BOX . IT HAS 6 CORES .


Here full signal notes as pdf  created by Birendra 👉


https://drive.google.com/file/d/1YOhhgg1OwU7QYeFItbCIdY8bBPRPp6vC/view?usp=drivesdk








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