In the past, 1EC 60050-446 (Part 446 of the IEV) listed the terminology for all types of electrical relays. In order to improve the precision of terms and definitions as well as the general visibility of relay terminology, it had been decided to split that part of the IEV into three separate parts optimised for the specific relay types covered. Therefore, this part of IEC 60050 gives terms and definitions for (specified) time relays superseding the terminology of IEC 60050-446 for such relays. The terminology for elementary relays (non-specified time all-or-nothing relays) is contained in IEC 60050-444 established in parallel with this part. A new part for measuring relays and protection equipment (IEC 60050-447) is also under preparation. When all these three parts are published, IEC 60050-446 shall be withdrawn.
IEC 60050-445-2002由国际电工委员会 IX-IEC 发布于 2002-01。
IEC 60050-445-2002 在中国标准分类中归属于: K04 基础标准和通用方法,在国际标准分类中归属于: 01.040.29 电气工程 (词汇),29.120.70 继电器。
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