CHAPTER-XVII

TRACK CIRCUITS AND AXLE COUNTERS

. I. TRACK CIRCUITS
. A. REQUIREMENTS    
17.1 Types of Track Circuits
17.2 Minimum Length
17.3 Series connection of tracks
17.4 Track relays 
17.5 Permanent way requirements of track circuits
. B. INSTALLATION
17.6 Location of track relays
17.7 Loading of track relay contacts
17.8 Jumper connections
17.9 Lead Wires  
17.10 Bond Wires and Rope Wires
17.11 Track Circuit Termination
17.12 Cut Section (fed over) arrangement of Track Circuits
17.13 Insulated Rail Joints
17.14 Track Indicators
17.15 DC Track Circuits
17.16 AC 50Hz/ 83.33 Hz Track Circuits
17.17 AC 50 Hz Track Circuits with Vane type Relays 
17.18 AC 50Hz/ 83 -1 Hz Track Circuits with Motor type Relays
17.19 Audio frequency Track Circuits
17.20 High Voltage Impulse Track Circuits
. C. MAINTENANCE
17.21 General
17.22 Track Relays
17.23 Insulated Rail Joints
17.24 Detection of faulty insulated joint
17.25 Stretcher Bars and Point Rodding Connections 
17.26 Bond Wires/Rope Wires
17.27 Jumper Connections
17.28 Ballast   
17.29 Drainage
17.30 Joint Inspection of Track by S&T and Permanent Way Inspector
17.31 Train Shunt
17.32 Track Circuit Test Record Card
17.33 Track Batteries/Track Feed Apparatus
17.34 Limiting Reactance of AC track circuit
17.35 Measurement of Phase Angle of AC track circuit
17.36 Raking out of cinders
17.37 Rusty Rails  
. II AXLE COUNTERS
. A. REQUIREMENTS    
17.38 to 17.42 Composition, application
. B. INSTALLATION
17.43 Installation of track devices and trolley protection track circuit
17.44 to 17.47 Resetting of axle counter
17.48 Protection for axle counter block working
17.49 Fixing of double rail mounted track device
. C. MAINTENANCE
17.50 to 17.53 Maintenance instructions and practices
Annexure 18 Centralization of DC shelf type track relays
Annexure19 Track circuit test record card
Annexure 20 Track circuit test card
Annexure 21 Maintenance card - Jeumont track circuit
Annexure 22 Maintenance Instructions for Axle Counter
Annexure 23 (Left blank Intentionally)