IEC 60947-3:2020
Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
OVERVIEW
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.
COMMENTS
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PRODUCT DETAILS
| Status | Current |
|---|---|
| Edition | 2020 |
| No. of Pages | 190 |
| ICS Classification | 29.130.20 Low voltage switchgear and controlgear 29.120.40 Switches |
| Committee | TC 121/SC 121A |
| Available for Purchase | For sale in Singapore only |
| Adoption | IEC |