BS 08/30180629 DC BS EN 61557-13. 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. Part 13. Hand-held and hand-manipulated current clamps and sensors for measurement of leakage currents in electrical distribu

standard by BSI Group, 12/19/2008