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IEVref:442-09-08ID: 442-09-08
Language:enStatus: Standard
Term: critical frequency
Synonym1:
Synonym2:
Synonym3:
Symbol: fcrit
Definition: frequency at which the reduction of the breakdown voltage of a clearance occurs


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:
TC/SC remarks:
VT remarks:
Domain1:Electrical accessories
Domain2:Insulation coordination for low voltage equipment
Domain3:
Domain4:
Domain5: