Working Of Points And Signals

TABLE OF CONTENTS

1. TESTING OF FIXED SIGNALS AND WIRES...................................... 5-1 (a) Testing of Fixed Signals .............................................................. 5-1 (b) Back Lights.................................................................................. 5-1 (c) Train Register Book Entries ........................................................ 5-1 (d) Regulating Signal Wires.............................................................. 5-1 (e) Obstruction on Line ..................................................................... 5-1 (f) Defects ......................................................................................... 5-2

2. FIXED SIGNALS AND POINTWORK .................................................. 5-2

(a) Distant Signals............................................................................. 5-2 (b) Facing Points ............................................................................... 5-2 (c) Signals Governing Facing Points ................................................ 5-2 (d) Signals Controlled by Track Circuit............................................ 5-3 (e) Shunting....................................................................................... 5-3 (f) Care Whilst Shunting .................................................................. 5-3 (g) Vehicles in Sidings ...................................................................... 5-3

3. CATCH POINTS ...................................................................................... 5-3 4. REVERSING OF SIGNALS ................................................................... 5-3

(a) Signals at “Proceed” not to be placed to stop.............................. 5-3 (b) Converging Trains ....................................................................... 5-4 (c) Overhead Sectioning.................................................................... 5-4

5. SIGNALS NOT IN USE............................................................................ 5-4

(a) Semaphore Signals ........................................................................5-4 (b) Light Signals................................................................................ 5-4 (c) Disc or Dwarf Signals ...................................................................5-5

6. LEVER SLEEVES.................................................................................... 5-5

(a) Description of Lever Sleeves....................................................... 5-5 (b) Disconnection Between Levers and Points ................................. 5-5 (c) Duties of Maintenance Employee ............................................... 5-5

7. POINTS INDICATORS ........................................................................... 5-6

(a) Coloured Point Indicator ............................................................. 5-6 (b) Plunger Locked Indicator ............................................................ 5-6

Revision 4 (1999) 5-I

Working Of Points And Signals 8. POINT DETECTORS............................................................................... 5-6

(a) Correct Setting of Facing Points.................................................. 5-6 (b) Regulating Signal Wires.............................................................. 5-7 (c) Signal Applies to More Than One Route .................................... 5-7

9. AUTOMATIC TRAIN STOPS ................................................................ 5-7

(a) Description of Automatic Train Stops......................................... 5-7 (b) Trip Valve.................................................................................... 5-8 (c) Multiple Trip Valves Cut In ........................................................ 5-8 (d) Trip Valve Irregularly Operated.................................................. 5-8 (e) Trip Valve Operated Close to a Home Signal ............................. 5-9 (f) Defective Train Stop .................................................................... 5-9 (g) Assistance for Driver; Defective Trip valve................................ 5-9

10. FIXING, REMOVING OR REPARING SIGNALS OR APPARATUS FOR WORKING POINTS AND SIGNALS ................. 5-9

(a) Advance Notice for Maintenance Work...................................... 5-9 (b) Alteration to Signalling ............................................................. 5-10 (c) Special Point Clip ...................................................................... 5-10 (d) Disarrangement of Interlocking................................................. 5-10 (e) Train Register Book and Voice Recording Facilities................ 5-11 (f) Lever Sleeves or Blocking Commands/Jacks to Affected

Points or Signals ........................................................................ 5-11 (g) Distant Signals Disconnected .................................................... 5-11 (h) Hand Signaller ........................................................................... 5-11 (i) Multiple Points Disconnected.................................................... 5-12 (j) Movement of Points................................................................... 5-12 (k) Dual Control Motor Operated Points ........................................ 5-12 (l) Interlocked Level Crossing Gates ............................................. 5-12 (m)Electro-hydraulic Dual Control Points....................................... 5-12 (n) Disconnected Points .................................................................. 5-13 (o) Hand Signaller for Repairs at Level Crossings ......................... 5-13

11. RETURNING WORKING POINTS AND SIGNALS TO SERVICE .............................................................................................. 5-13

(a) Restoring Locking ..................................................................... 5-13 (b) Voice Recording Facilities ........................................................ 5-13 (c) Interlocking Remote from Signalbox ........................................ 5-14 (d) Security of Interlocking............................................................. 5-14

12. CERTIFICATE OF TESTING ............................................................. 5-14

5-ii Revision 4 (1999)

rapsonk

Ammended by Circular SW1067/2003 See previous pages

rapsonk

Amended by Circular SW.1067/2003 See previous pages

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