BS EN IEC 61557-6:2021 : Title: Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c.. Equipment for testing, measuring or monitoring of protective measures Effectiveness of residual current devices (RCD) in TT, TN and IT systems Pages: 26 Year: Publisher: British Standards Institution Availability: Within 1-2 working days
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