Railway applications. Insulation coordination-Basic requirements. Clearances and creepage distances for all electrical and electronic equipment
铁路应用 绝缘配合
BS EN 50124-1:2017 deals with insulation coordination in railways. It applies to equipment for use
in signalling, rolling stock and fixed installations.Insulation coordination is concerned with the selection, dimensioning and correlation of insulation both
within and between items of equipment. In dimensioning insulation, electrical stresses and
environmental conditions are taken into account. For the same conditions and stresses, these
dimensions are the same.An objective of insulation coordination is to avoid unnecessary over dimensioning of insulation.This standard specifies:requirements for clearances and creepage distances for equipment;general requirements for tests pertaining to insulation coordination.The term equipment relates to a section as defined in 3.3 it may apply to a system, a sub-system, an
apparatus, a part of an apparatus, or a physical realization of an equipotential line.This standard does not deal with:distances through solid or liquid insulation;distances through gases other than air;distances through air not at atmospheric pressure;equipment used under extreme conditions.Product standards should align with this generic standard.However, they may require, with justification, different requirements due to safety and/or reliability
reasons, e.g. for signalling, and/or particular operating conditions of the equipment itself, e.g.
overhead contact lines which should comply with EN 50119.This standard also gives provisions for dielectric tests (type tests or routine tests) on equipment (see
Annex B).NOTE For safety critical systems, specific requirements are needed. These requirements are given in the
product specific signalling standard EN 50129.Cross References:EN 50123EN 50163EN 60060-1IEC 60060-1EN 60071-1IEC 60071-1EN 60112IEC 60112EN 60587IEC 60587EN 60664-1:2007IEC 60664-1:20072008/57/ECEN 50121EN 50125EN 50129EN 50152EN 50153EN 60071-2IEC 60071-2EN 60077-1IEC 60077-1EN 60099-1IEC 60099-1EN 60099-4IEC 60099-4EN 60168IEC 60168EN 60364IEC 60364EN 60383-1IEC 60383-1EN 60383-2IEC 60383-2EN 60507IEC 60507EN 60529IEC 60529EN 60660IEC 60660EN 60664-3IEC 60664-3EN 60664-5IEC 60664-5EN 60947-1IEC 60947-1EN 61109IEC 61109IEC 61245EN 61558IEC 61558EN 61936-1IEC 61936-1EN 62271-1IEC 62271-1IEC/TR 60099-3IEC 60664-2-1IEC/TR 60815:1986IEC/TS 60815EN 50119All current amendments available at time of purchase are included with the purchase of this document.