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AN INTRODUCTION TO - page 16 / 72

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ine C le ar

ine C le ar

ine C le ar

ine C le ar

rain On Line

rain On Line

rain On Line

rain On Line

Du n g ri Pa n e l

Valsad Panel

UP ine TO Valsad

Down Line o Dung i

A representation of typical block instrument in operation on the IR is given on the next page. The upper panel on instrument A shows the status of the up line to the next station namely Valsad. The needle at the Line Closed position denotes that no train is allowed to enter the Block Section and neither is any train already in the block section. If Dungri station wants to send a train to Valsad he will press the yellow bell plunger once which will ring the bell at Valsad once (calling attention signal) In turn Valsad station will acknowledge by pressing his own bell plunger once and picking up the block phone. The cabinman at dungri also picks up the phone and gives the description of the train he wants to send to Valsad. For example it’s the 2926 up Paschim exp. train.

Line

Line

Closed

Closed

Line

Line

Closed

Closed

DOWN Line FROM Valsad

Up ine From Dungri

A

B

When Valsad panel receives the train description he gives a Private Number to Dungri Cabin. Now both put down their phones and make an entry in a register known as the Train Signal Register (TSR).Various timings regarding the procedure are noted down in the TSR. After a minute or two depending on the current position of the train Dungri cabin will send two beats on the block bell (Line Clear Inquiry) asking Is Line Clear? If all the conditions for issuing a Line Clear are being met at Valsad, the station master at Valsad will press his block plunger twice and while

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