NR NR/PS/ELP/21101 ISSUE 2 PDF

This specification applies to all new track cables installed on d.c. electrified lines designated as surface railways.

Purpose

This specification states the requirements for the design, manufacture, testing at works and at site, and delivery ex works of track cables for use on d.c. traction systems to provide, the 650/750 V d.c. supply from traction substations and track paralleling huts to the conductor rails and negative cable connections and, where appropriate, bonding.

Positive cables provide the connections between the positive d.c. switchgear and isolators and lineside equipment associated with the electrification system. This may include, conductor rails and between lengths of conductor rail.

Negative connections are installed at substations and track paralleling huts between the negative bar and electric track equipment installed on the track. This may include impedance bonds, resonating bonds or terminating plates, running rails, negative conductor rails, reinforcing rails or running rails.