NR RT/E/C/02012 ISSUE 1 PDF

The enhanced maintenance can be applied to all types of switch and crossing layout and operating devices other than purely mechanical, lever operated installations. For example installations with wood or concrete bearers, point machines or clamp lock mechanisms, relay or Solid State Interlocking control.

Opportunities exist for automatic data capture to help refine the application of maintenance through active condition monitoring devices. The enhanced maintenance specified in this code of practice is considered to be compatible with any such opportunities although no particular condition monitoring devices are specified or recommended.

PURPOSE

This code of practice defines enhanced maintenance requirements for switch and crossing systems. The aim is to offer the ability to increase reliability by detecting and correcting deficiencies to switch and crossing related infrastructure before they give rise to deterioration or failure.

This code of practice is part of a suite of documents which defines default, enhanced and reduced maintenance requirements for switch and crossings. It details all infrastructure requirements (track, control systems, point heating, telecomms) associated with the switch and crossing, treating it as a complete sub-system. This means that the maintenance considers not only the permanent way and point operating device but also, for example, the adjacent block joints, cables, the track circuit over the points, bonding, associated relays in the adjacent apparatus case and any points test telephone.

Each document defines the circumstances associated with implementation and is supported by guidelines on establishing a suitable base equipment condition, fault rectification and specific defined test or maintenance sequences  - often related to specific types of mechanism, e.g. HW point machine.