IEC 61557-9 : 3.0现行
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 9: EQUIPMENT FOR INSULATION FAULT LOCATION IN IT SYSTEMS
出版：International Electrotechnical Committee
专家解读视频
Describes the requirements for insulation fault location systems which localize insulation faults in any part of the system in unearthed IT a.c. systems and unearthed IT a.c. systems with galvanically connected d.c. circuits having nominal voltages up to 1000 V a.c., as well as in unearthed IT d.c. systems with voltages up to 1500 V d.c., independent of the measuring principle.
NEN EN IEC 61557-9 : 2015 C2 2017 - Identical
NEN IEC 61557-9 : 1999 - Identical
DS EN 61557-9 : 2015 COR 2017 - Identical
DIN EN 61557-9 : 2015 COR 1 2017 - Identical
CEI EN 61557-9 : 2016 - Identical
VDE 0413-9 : 2015 COR 1 2017 - Identical
EN 61557-9:2015 - Identical
NBN EN 61557-9 : 2015 COR 2016 - Identical
PN EN 61557-9 : 2015 AC 2017 - Identical
UNE EN 61557-9 : 2010 - Identical
