"This part of IEC 61992 specifies requirements for d.c. disconnectors@ switch-disconnectors and earthing switches for use in outdoor fixed installations of traction systems. NOTE 1 EN 50121-5 specifies requirements for electromagnetic compatibility (EMC). NOTE 2 In this standard the word ""unit"" means ""switch-disconnector and/or disconnector and/or earthing switch"" as defined in 3.1.5@ 3.1.6 and 3.1.7 of IEC 61992-1."
IEC 61992-4-2015由IEC - International Electrotechnical Commission 发布于 2015-09-01,并于 2015-09-30 实施。
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