Standard

NEK IEC 60420:1990

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This standard applies to three-pole units for public and industrial distribution systems which are functional assemblies of switches including switch-disconnectors and current-limiting fuses and thus able to interrupt: -any load current up to the rated breaking current of the switch; -any over-current up to the rated short-circuit breaking current of the combination by which automatic interruption is initiated. This standard applies to combinations designed with rated voltages above 1 kV and below 52 kV for use on three-phase alternating current systems of either 50 Hz or 60 Hz.

Dokumentinformasjon

  • Standard fra NEK
  • Publisert:
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  • Utgave: 2.0
  • Versjon: 1
  • Varetype: NAT
  • Products.Specs.pages
  • ICS 29.130.10
  • National Committee NEK/NK17A+C

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