scope:

Foreword

This standard is intended to apply to rail vehicles that are electrically powered. These vehicles include locomotives, railway electric multiple unit (EMU) cars, Heavy Rail Vehicles, and Light Rail Vehicles, including units that combine powered and unpowered trucks or axles. Fully-automated, driverless implementations of the above vehicle types are sometimes included in the mode of transit referred to as Automated Guideway Transit (AGT), and, to the extent that the vehicle does not have other unique requirements, this standard can be applied. It is not intended that this standard be universally required for all AGT systems.

The classes of railway vehicles (such as those termed "Diesel Multiple Unit" [DMU]) that use a non-electric propulsion system have features of the electrical systems used in these vehicles that are similar to those used in "conventional" electrically-powered vehicles. To the extent that these systems are similar to those used in electrically powered vehicles, this standard can be applied.

NOTE-Self-propelled railway vehicles operating on trackage of the general railroad system are subject to regulations issued by governmental bodies (e.g., federal, state, and local bodies). In selected jurisdictions this is also true for rail transit vehicles. The user of this Standard should recognize that such regulations always take precedence over a consensus standard.

Certain heavy-duty rubber tired vehicles, notably dual-mode, hybrid, and electric trolley buses and large offhighway haulage trucks, utilize electric propulsion systems. Again, to the extent that these systems are similar to those used in rail vehicles, this standard can be applied.

It should be noted that this standard makes extensive use of the phrase, "as agreed to between the supplier and the authority having jurisdiction", as well as requiring that the "authority having jurisdiction" provide certain significant parameters and/or make important determinations relevant to a specific project and not necessarily able to be anticipated in advance. Annex B lists all such citations within the standard and categorizes them as guidance for users of this standard.

Scope

This standard prescribes design, application, and test requirements for electrical and electronic control apparatus on rail vehicles.

NOTE-This standard covers neither rotating equipment nor the functional aspects of converters.¹