GB/T 21413.2-2021 Railway applications—Electric equipment for rolling stock—Part 2:Electrotechnical components—General rules

Scope

This document specifies the general rules for all electrical devices installed in the main circuits, auxiliary circuits, control circuits, and indication circuits of locomotives and rolling stock.
This document applies to all electrical devices on locomotives and rolling stock.
Electrical devices primarily refer to switching equipment and control equipment, as well as relays, electro-pneumatic (magnetic) valves, resistors, fuses, etc., regardless of their control nature.
Currently, electronic components or electronic assemblies are also included in electrical devices. This document does not apply to electronic equipment, but electronic components or electronic assemblies installed in electrical devices should not be excluded from the scope of this document.
Electronic components or electronic assemblies comply with corresponding standards.
After consultation between the user and the manufacturer, some rules of this document may be applied to electrical devices on other locomotives and rolling stock (such as industrial locomotives, trolleybuses, etc.).
This document provides:
—— Device characteristics;
—— Conditions of use that the devices should comply with;
—— Test items and test methods used to verify the devices' compliance with the characteristics under the conditions of use;
—— Information that should be marked or provided on the devices.
This document does not apply to industrial electrical devices, which comply with their respective product standards. To ensure the normal operation of these devices on locomotives and rolling stock, this document only stipulates the special requirements for these devices under rail transit conditions. For this purpose, specific documents will explain the additional requirements that these devices should meet, such as:
—— Adaptation (e.g., control voltage, environmental conditions, etc.);
—— Installation and use without having to withstand the specifi

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