Draft Details

1.1
This standard applies to the overhead contact system and traction power supply to the locomotive, using a single-phase alternating supply (AC) at 25 kV or 2x25 kV nominal voltage, 60 Hz, for new installations and modification to existing system.

1.2 
This standard has been written primarily for use in the development of conventional railway freight and mainline/commuter passenger services. However, the use of the standard is recommended for development of special services, such as rapid transit, wherever possible.

1.3 

1.3
The standard covers design considerations in the following selected areas of railway electrification:

a) Electric rail traction power system studies;
b) vertical and horizontal clearances;
c) overhead contact systems;
d) interference with railway signaling circuits;
e) interference with communication circuits;
f) utility interface-unbalance and harmonics;
g) grounding and bonding; and
h) the overall traction power system performance as it relates to system reliability, availability, maintainability, and safety (RAMS)

1.4 
The clauses contained in this standard do not constitute complete design or construction specifications for railway electrification.

1.5
Conditions not covered by this standard may be governed by the appropriate requirements or other standards and documents in common use or as required by constituted authority.

1.6 
In addition to the reference publications listed in Clause 2, the standards and guidelines of the American Railway Engineering and Maintenance-of-Way Association (AREMA), the Association of American Railroads (AAR), the European Norms (EN), the International Electrotechnical Commission (IEC), and the Union Internationale des Chemins de Fer (UIC) may be used in areas not included in this standard.