EN 60420:1993

EN 60420:1993 is a standard published by CLC. Its full title is "High-voltage alternating current switch-fuse combinations". This standard covers: 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.

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.

EN 60420:1993 has the following relationships with other standards: It is inter standard links to EN 62271-105:2003, IEC 60050-441:1984, EN ISO 3680:2004, HD 348 S7:1998, EN 60282-1:1996, EN 60265-1:1998, EN 60204-11:2000, EN 60282-1:2002. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

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