BS EN 61557-11:2009 : Title: 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 Effectiveness of residual current monitors (RCMs) type A and type B in TT, TN and IT systems Pages: 24 Year: Publisher: British Standards Institution Availability: Within 1-2 working days
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