CAN/CSA-C22.3 No.8-M91 (R2003)

1. Scope 1.1 This Standard applies to the overhead contact system and traction power supply to the locomotive, using a single-phase alternating supply at 25 or 50 kV nominal voltage, 60 Hz. 1.2 This Standard has been written primarily for use in the development of conventional railway freight and passenger services. However, the use of the Standard is recommended for development of special services, such as rapid transit, wherever possible. 1.3 This Standard covers design considerations in the following selected areas of railway electrification: (a) insulation coordination and electrical clearance; (b) vertical and horizontal clearances; (c) overhead contact systems; (d) interference with railway signalling circuits; (e) interference with communication circuits; (f) utility interface-unbalance and harmonics; and (g) grounding and bonding. It is not intended to be a complete guideline on railway electrification. 1.4 The recommendations and comments contained in this Standard do not constitute complete design or construction specifications and are for guidance only. 1.5 Conditions not covered by this Standard may be governed by the appropriate requirements or other documents in common use or as required by constituted authority. 1.6 In addition to the reference publications listed in Clause 2.3, the standards and guidelines of the American Railway Engineering Association (AREA), the Association of American Railroads (AAR), the International Electrotechnical Commission (IEC), and the Union International des Chemins de Fer (UIC) may be used in areas not included in this Standard.