Standard

NEK IEC 60420:1973

Withdrawn

Note: This standard has a new edition: NEK IEC 60420:1990

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Abstract

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.

Document information

  • Standard from NEK
  • Published:
  • Withdrawn:
  • Edition: 1.0
  • Version: 1
  • Document type: NAT
  • National Committee TC 17/SC 17A

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