IEC 60420:1973
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
High-voltage alternating current switch-fuse combinations and fuse-circuit-breaker combinations
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03-09-2020
01-01-1973
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.
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