Објављен
IEC 60947-3:2020 applies to switches, disconnectors, switch-disconnectors and fuse-combination units and their dedicated accessories to be used in distribution circuits and motor circuits of which the rated voltage does not exceed 1 000 V AC or 1 500 V DC. This fourth edition cancels and replaces the third edition published in 2008, Amendment 1:2012 and Amendment 2:2015. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
- addition of critical load current tests for DC switches (see 9.3.9);
- addition of requirements for a conditional short-circuit rating for disconnectors, switches, and switch-disconnectors protected by circuit-breakers (see 9.3.7.2);
- addition of new categories for high-efficiency motors switching (see Annex A);
- addition of new Annex E for connection to aluminium conductors;
- addition of new Annex F for power losses measurement.
The contents of the corrigendum of October 2021 have been included in this copy.
ПОВУЧЕН
IEC 60947-3:2008 ED3
ПОВУЧЕН
IEC 60947-3:2008/AMD1:2012 ED3
ПОВУЧЕН
IEC 60947-3:2008/AMD2:2015 ED3
ОБЈАВЉЕН
IEC 60947-3:2020 ED4
60.60
Стандард објављен
22. 4. 2020.
Нисконапонске расклопне апаратуре - Део 3: Склопке, растављачи, склопке растављачи и комбинације са осигурачима
60.60 Стандард објављен