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IEVref: | 442-09-08 | | ID: 442-09-08 |
Language: | en | | Status: Standard |
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Term: | critical frequency
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Synonym1: | | | |
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Symbol: | fcrit
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Definition: | frequency at which the reduction of the breakdown voltage of a clearance occurs
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Publication date: | 2014-11 |
Source | IEC 60664-4:2005, 3.4 |
Replaces: | |
Internal notes: | 2014-12-10: <in ionospheric propagation> deleted in accordance with mail from VT 60050 convenor. JGO |
CO remarks: |
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TC/SC remarks: | |
VT remarks: | |
Domain1: | Electrical accessories |
Domain2: | Insulation coordination for low voltage equipment |
Domain3: | |
Domain4: | |
Domain5: | |