scope:

This standard applies to pre-commissioning, commissioning, maintenance (both preventative and corrective), and incident investigation. It also applies to decommissioning and removal from service (whether temporary or permanent), in relation to its potential impact on the integrity of the remaining system.

This standard shall apply to in-situ signal testing on the system for which London Underground is the Infrastructure Manager, and also to site-specific testing taking place away from the railway (e.g. pre-wired racks or location cases, or data-driven interlockings).

This standard replaces E7511 A1.

Purpose

The purpose of this Standard is to define mandatory requirements for the testing of vital signalling systems (which may include elements of trainborne sub-systems, up to a defined interface for each type of rolling stock), prior to entry (or re-entry) into operational service.