BS 12/30228018 DC
BS 12/30228018 DC
BS EN 61557-15. Electrical safety in low voltage distribution systems up to 1000 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 systems and equipment for insulat ion faul
standard published 02/14/2012 by British Standards Institution