General Information on Track Circuits - RGS Online

<strong>General</strong> <strong>Information</strong> on Track Circuits
1 Introduction
2 High Voltages
3 Lineside Apparatus
Housing Inspection
4 Bonding Inspection
Withdrawn Document
Uncontrolled When Printed
Part G
Testing and Commissioning
Railway Group Approved Code of Practice
GK/RC0752
Issue Two
Date December 1998
Page G1 of 3
The requirements for testing and commissioning of track circuits are detailed in
the following:
New Works : GK/RH 0730
Maintenance/Fault Finding : GK/RH 0740
Details of available instrumentation and its uses are given in Part F.
This Part details the general requirements for testing and commissioning.
Reference should also be made to the Testing & Commissioning Part of the
Code of Practice for the particular track circuit design involved.
Ensure that warning signs (Figure E21) are fixed to all exposed track circuit
capacitors and to the outside of lineside apparatus housings containing high
voltage track circuit equipment.
Details of the warning signs can be found in Part E.
Check that:
a) All track equipment is of the correct type, as specified in the wiring diagrams,
and that applicable pin code configurations are correct.
b) All equipment is correctly labelled.
c) There are no prohibited combinations of adjoining or parallel types of track
circuits.
d) There are no prohibited track circuit equipment combinations.
e) A wire count is carried out on all terminations, and the wiring proved correct.
Check that:
a) The physical positions of all IRJs or track ends are correct, especially those
defining overlaps or clearance points.
b) The physical stagger between nominally opposite IRJs does not exceed the
permissible dimensions, and that no sub–section of the track circuit is shorter
than the permitted minimum.
c) All rail bonds, rail jumpers, traction bonds, track circuit interrupters and track
feed/relay cables are in accordance with the bonding plan and scheme plan,
and are secure.
R A I L T R A C K G1