M00001289
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IEC 61557-6 Ed. 1.0 b:1997 [ Withdrawn ] Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 6: Residual current devices (RCD) in TT and TN systems
standard by International Electrotechnical Commission, 02/28/1997
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Availability date: 08/01/2021