| Publication CODE |
Title |
| NBN EN IEC 60947-3:2021 (2021-03) |
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 3: SWITCHES, DISCONNECTORS, SWITCH-DISCONNECTORS AND FUSE-COMBINATION UNITS |
| |
| Price Excl. VAT |
Total number of pages, tables and drawings |
|
20.00 €
|
6. |
Description
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.
|
| Class |
C
|
Available files
ATTENTION: Belgian registered standards (NBN EN or NBN HD) are generally
only available in English or French. Only the cover page is translated
and the document itself is in English or in French.
|
|
|
| Committee |
CLC/TC 121A
Low-voltage switchgear and controlgear
|
| BEC Approval |
2020-05-27 |
| NBN Approval |
2021-03-24 |
| NBN Status |
New |
|
| Date of ratification (d.o.r.) |
2020-05-27 |
| Date of announcement (d.o.a.) |
2021-05-19 |
| IEC file modification date |
2021-02-20 |
|
