VRIOGS 010.7 RevA - Public Transport Victoria

VRIOGS 010.7 Revision A 15(b) A direct traction fault to the rail.time (s) Potential (V)0.02 9400.05 7700.1 6600.2 5350.3 4800.4 4350.5 3950.6 3100.7 2700.8 2400.9 2001.0 170≤ 300 150> 300 120Table 3 –Touch Potential Limits6.2.8 FlashoverThe Designer shall ensure that, where a “flashover” to rail occurs due to faultyvehicle or overhead insulator, sufficient current is conducted for sufficient time to tripthe required sub-station circuit breakers. This feature should not be lost through asingle-point.6.2.9 Cabling1. The bonding cables and cable connections are the part of the traction currentreturn path most vulnerable to damage or vandalism. Consequently thedesign of all traction bonding connections shall allow for at least one parallelcable or connection to become disconnected. In this circumstance theremaining cables or connections shall still allow the normal designed returntraction current to flow without causing further damage.2. A minimum of two cables or connectors each rated for the full normal currentor three cables or connectors each rated for half the normal current shall beinstalled.6.3 Track Circuit Bonding and Track InsulationWhere track circuits are installed, GIRJs and bonding shall be provided as necessaryto ensure that track circuits operate effectively, traction return path is maintained, andtrain detection is maintained over all parts of the track circuit whilst broken railNOTE: 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.