Block Proving With Axle Counter Using UFSBI

Block Proving With Axle Counter Using UFSBI

SPECIFICATION NO. : IRS:S – 105/2012 Ver. 0

DESCRIPTION :

The system works as per Absolute Block system, incorporating the features of Block Proving by Axle Counter to control the movement of trains on single line block section from one block station to another. The work instructions are in conjunction with the General Rules (GR) of 1976 and its amendment in 2002. These instructions do not supersede any rule laid down in GR

PRINCIPLE OF WORKING :

• The trains are worked on Absolute Block system.
• Each block section is provided with an Axle Counter to verify the occupation or clearance of block section and indicated on Block Panel.
• It is not possible to obtain Last Stop Signal to ‘OFF’ unless “LINE CLEAR” has been obtained from the station in advance.
• It is not possible to take “LINE CLEAR” unless block section and an adequate distance beyond first stop signal of station in advance is clear of trains.
• The Last Stop Signal assumes ‘ON’ aspect automatically on entry of train into block section and retains this ‘ON’ position, till a fresh “LINE CLEAR” is obtained.
• Block section automatically shows “TRAIN ON LINE” on block panel when a train enters into the block section on “LINE CLEAR”.
• Audio – Visual alarms for Train entry/exit, to/ from block section are provided and are to be acknowledged.
• “LINE CLOSE” feature is automatic after complete arrival of train.
• “LINE CLEAR” cannot be taken without taking consent of receiving station.
• “LINE CLEAR” cancellation is Co-operative.

SYSTEM COMPONENTS :

The System comprises of the following items

Block Panel :	As per drg. no.RDSO/S32019 & RDSO/S32017 for SL & DL respectively
UFSBI :	As per IRS :S-104/2012, VER - 0
Relay Rack :	As per drg. no.RDSO/S 32020 & RDSO/S32018 for SL & DL respectively
Block Telephone :	As per RDSO/SPN/191/2006
Media :	OFC/QUAD