High-voltage switchgear and controlgear - Alternating current contactors, contactor-based controllers and motor-starters
High-voltage switchgear and controlgear - Alternating current contactors, contactor-based controllers and motor-starters
1 General
1.1 Scope and object This part of IEC 62271 is applicable to a.c. contactors and/or contactor -based controllers and motor- starters designed for indoor installation and operation at frequencies up to and including 60 Hz on systems having voltages above 1 000 V but not exceeding 24 000 V. It is applicable only to three-pole devices for use in three-phase systems, and single-pole devices for use in single-phase systems. Two-pole contactors and starters for use in single-phase systems are subject to agreement between manufacturer and user. Contactors and/or starters dealt with in this standard typically do not have adequate short-circuit interruption capability. In this context, this standard gives requirements for
— motor starters associated with separate short-circuit protective devices ;
— controllers - contactors combined with short-circuit protective devices ( SCPD ).
Contactors intended for closing and opening electric circuits and, if combined with suitable relays, for protecting these circuits against operating
Упомянутые в описании и другие стандарты BS