VRIOGS 010.7 RevA - Public Transport Victoria

VRIOGS 010.7 Revision A 252. Traction return bonding cables shall be 300 mm 2 flexible aluminium cablessupplied in accordance with the VRIOGS and the Infrastructure Manager’sSignalling Cable Specifications.6.9.2 TypesThe Constructor shall supply and install WRSA 2000 type series impedance bondswhich are rated at 2000A continuous per side or 4000 A continuous in total, or anInfrastructure Manager’s type approved equivalent. (This includes the WRSA 2000Rtype resonated bonds for 50 Hz and 25 Hz, 2000AF for audio frequency and 2000HVfor Jeumont Schneider high voltage type track circuits.)6.9.3 Mounting1. Impedance bonds shall be installed on steel frames mounted outside thetrack and not between rails. Impedance bonds on contiguous track circuitsshould be mounted on a common frame.2. Impedance bonds are to be mounted in a vertical plane. The Constructor is tosupply and install approved mounting frames and foundations.3. Impedance bonds when installed in an upright position shall have a protectiveweatherproofing cap installed on top of the impedance bond, to protectagainst the ingress of water.6.9.4 Connections1. The connections of cables to impedance bonds i.e. side leads, neutral leadsand tie-in bond leads shall be with crimped cable lugs specified in thisspecification.2. Where the type of impedance bond does not permit direct connection of thenominated cables suitable tinned copper adapter plates shall be provided topermit correct termination of the nominated cables and lugs.3. Side, neutral and tie-in lead terminations shall be accessible for examinationand disconnection with the impedance bond lid or cover in place but shall notbe unduly exposed to damage. Cables shall be mechanically supported toreduce any load on the termination point and cable lugs.4. No impedance bond cable connection shall be less than 600 mm aboveground level.5. Bonding connections to the rail shall be in accordance with this specification.6. Where impedance bond and cables are connected to substations, tie stations,or negative return pillars there shall be a “Danger High Voltage SubstationCables –Access Permit Required” sign affixed in a permanent manner to theimpedance bond that has the connections to the substation or tie station.7. Traction return cables from impedance bonds to substations or tie stationsshall be by connection to the Junction Box -Plan No. STD_G0066.NOTE: 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.