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IEC 60420:1973 ED1

High-voltage alternating current switch-fuse combinations and fuse-circuit-breaker combinations
1 jan 1973

General information

99.60     19 nën 2016

IEC

TC 17/SC 17A

International Standard

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Revised

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Scope

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.

Life cycle

NOW

WITHDRAWN
IEC 60420:1973 ED1
99.60 Withdrawal effective
19 nën 2016

CORRIGENDA / AMENDMENTS

WITHDRAWN
IEC 60420:1973/AMD1:1975 ED1

WITHDRAWN
IEC 60420:1973/AMD2:1977 ED1

WITHDRAWN
IEC 60420:1973/AMD3:1978 ED1

REVISED BY

WITHDRAWN
IEC 60420:1990 ED2