VRIOGS 010.7 RevA - Public Transport Victoria

VRIOGS 010.7 Revision Av6.6.3 Double Rail .....................................................................................216.6.4 Single Rail.......................................................................................216.6.5 Audio Frequency Track Circuits......................................................226.6.6 Impulse Track Circuits ....................................................................226.7 Electrolysis Bonds ......................................................................................226.7.1 General...........................................................................................226.7.2 Location...........................................................................................236.7.3 Connection ......................................................................................236.8 Spark Gap Protective Devices....................................................................236.8.1 General ...........................................................................................236.8.2 Installation .......................................................................................236.9 Impedance Bonds ......................................................................................246.9.1 General ...........................................................................................246.9.2 Types ..............................................................................................256.9.3 Mounting .........................................................................................256.9.4 Connections ....................................................................................256.9.5 Side Leads ......................................................................................266.9.6 Neutral Point....................................................................................266.9.7 Reuse..............................................................................................276.10 Overhead Wiring Switches and Temporary Rail Connections....................276.11 Friction Buffer Stops and Bonding..............................................................276.12 Traction Overhead “Air Gaps” and placement in relation to signals ...........27SECTION 7.0 NON-ELECTRIFIED TRACK IN ELECTRIFIED AREA ..................287.1 General.......................................................................................................287.2 Train Detection ...........................................................................................287.3 Traction Current .........................................................................................287.3.1 Isolation...........................................................................................287.3.2 Overruns .........................................................................................287.3.3 Traction Run-Off .............................................................................297.3.4 Traction Fault Current ......................................................................297.3.5 Fault current path in Rails ................................................................297.3.6 Acceptable Levels............................................................................307.3.7 Calculation.......................................................................................317.4 Other Equipment ........................................................................................317.5 Immunisation ..............................................................................................317.6 Track Circuits .............................................................................................327.6.1 General...........................................................................................327.6.2 Single Rail Track Circuit .................................................................327.6.3 Double Rail Track Circuit................................................................327.6.4 Jointless Track Circuit.....................................................................327.7 Non Track Circuited Track..........................................................................327.8 Cross Bonding............................................................................................33SECTION 8.0 INSULATED RAIL JOINTS.............................................................348.1 General.......................................................................................................34SECTION 9.0 CABLES AND BUSBARS...............................................................369.1 General.......................................................................................................369.2 Electrolysis Bonding ...................................................................................369.3 Neutral Bus Bar ..........................................................................................369.4 Cables ........................................................................................................36SECTION 10.0 TRACK BONDING AND RAIL CONNECTIONS.........................4010.1 General.......................................................................................................4010.2 Installation ..................................................................................................4010.2.1 Labelling .........................................................................................4210.2.2 Connections ....................................................................................4210.3 Length of Track Leads................................................................................42NOTE: This document is controlled only when viewed on the DOT Engineering Standards website.Any other copy of this document is uncontrolled, and the content may not be current.