IEC 60056:1987 ED4

High-voltage alternating-current circuit-breakers

Publication date:   Mar 30, 1987

General information

99.60 Withdrawal effective   May 29, 2001

IEC

TC 17/SC 17A

International Standard

29.130.10   High voltage switchgear and controlgear

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Scope

Applies to a.c. circuit-breakers designed for indoor or outdoor installation and operation at frequencies up to and including 60 Hz on systems having voltages above 1 000 V. Applies only to three-pole circuit-breakers for use in three-phase systems and single-pole circuit-breakers for use in single-phase systems. Two-pole circuit-breakers for use in single-phase systems are subject to agreement between manufacturer and user. Also applies to the operating devices of circuit-breakers and their auxiliary equipment. However, circuit-breakers with a closing mechanism for dependent manual operation are not covered since a rated short-circuit-making current cannot be specified, and dependent manual operation may be objectionable because of safety considerations. Does not cover circuit-breakers intended for use on motive power units of electrical traction equipment, or circuit-breakers for use with overhead lines which include series capacitors. Replaces IEC 60056-1 to 60056-6.

Life cycle

NOW

WITHDRAWN
IEC 60056:1987 ED4
99.60 Withdrawal effective
May 29, 2001

CORRIGENDA / AMENDMENTS

WITHDRAWN
IEC 60056:1987/AMD1:1992 ED4

WITHDRAWN
IEC 60056:1987/AMD2:1995 ED4

WITHDRAWN
IEC 60056:1987/AMD3:1996 ED4

REVISED BY

WITHDRAWN
IEC 62271-100:2001 ED1