ForewordThis 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.ScopeThis 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