IEC 61557-15 2014.02.01 Electrical safety in low voltage distribution systems up

IEC 61557-15        2014.02.01        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 – Part 15: Functional safety requirements for insulation monitoring devices in IT        158pages