In addition to CLC/TS 61643-12, BS PD CLC/TR 50656:2016 describes the principle of erecting SPDs to beconnected to 50 Hz a.c. power circuits, rated up to 1 000 V r.m.s. in conjunction with Class II equipments.In addition to EN 61643-11, this Technical Report gives specific guidance for SPDs intended to be installed inclass II equipments.Cross References:EN 50539-11:2013EN 60529IEC 60529EN 60664-1IEC 60664-1EN 60950-1IEC 60950-1EN 61643-11:2012IEC 61643-11:2011EN 62368-1:2014IEC 62368-1:2014HD 60364
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