scope:

This standard:

a) defines the minimum requirements for the performance of the ETE system;

b) defines the specific requirements for Track Isolating Switches;

c) defines the minimum acceptable condition for ETE including:

I) d.c. Cables and Terminations;

II) Conductor Rail Bonds;

III) Traction Bleed Resistors (when mounted trackside);

IV) Low Current d.c. Track Connections;

V) Track Isolating Switches;

VI) Circuit breakers (not encompassed by S1109 but including trackside siding contactors);

VII) Disconnection Panels;

VIII) Emergency Gap Jumper Cables and their storage cabinets;

IX) Equipment for Depot Shed Shore Supplies;

X) Equipment permanently connected to the conductor rails to indicate the presence of traction voltage (P-CRID).

This standard excludes the requirements for:

a) equipment within the traction supply sub-station; and

b) the conductor rails.

This standard supersedes 1-107 A3.

Purpose

The purpose of this standard is to provide the minimum requirements for Electrical Track Equipment (ETE) used to control the delivery of the d.c. traction supply to London Underground's conductor rail network, including main lines, depots, sidings and shore supplies in depot sheds.