IEC 60947-9-2
– detect internal arc-faults in low-voltage switchgear and controlgear assemblies, by processing (at a minimum) the optical effect of an internal arc-fault, and
– operate mitigation device (either external or combined) in order to minimize the effects of the internal arc-fault.
Technical committee
TC 121/SC 121A Low-voltage switchgear and controlgear| Publication type | International Standard |
| Publication date | 2021-04-26 |
| Edition | 1.0 |
| ICS | 29.120.40 29.130.20 |
| Stability date | 2026 |
| ISBN number | 9782832296066 |
| Pages | 175 |
| File size | 6.38 MB |
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