This part of EN 50123 specifies requirements for d.c. disconnectors, switch-disconnectors and earthing switches for use in indoor fixed installations of traction systems. NOTE 1 Switchgear assemblies, electromagnetic compatibility (EMC) and dependability are not covered in this part of EN 50123, but rather by other parts of this standard or other documents as indicated in EN 50123-1. NOTE 2 In this standard the word ""unit"" means ""disconnector and/or switch-disconnector and/or earthing switch"" as defined in 3.1.4, 3.1.5 and 3.1.6 of EN 50123-1. NOTE 3 Disconnectors, switch-disconnectors and earthing switches may have electrically latched mechanisms and,
DS/EN 50123-3-2003由丹麦标准化协会 DK-DS 发布于 2003-09-12,并于 2003-08-29 实施。
DS/EN 50123-3-2003在国际标准分类中归属于: 29.280 电力牵引设备。
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