"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 singlephase 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 ?C motor starters associated with separate short-circuit protective devices; ?C 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 overloads are covered in this standard. This standard is also applicable to the operating devices of contactors and to their auxiliary equipment. Motor-starters intended to start and accelerate motors to normal speed@ to ensure continuous operation of motors@ to switch off the supply from the motor and to provide means for the protection of motors and associated circuits against operating overloads are dealt with. Motor-starter types included are ?C direct-on-line starters; ?C reversing starters; ?C two-direction starters; ?C reduced kVA (voltage) starters; ?auto-transformer starters; ?rheostatic starters; ?reactor starters. This standard does not apply to ?C circuit-breaker-based motor-starters; ?C single-pole operation of multi-pole contactors or starters; ?C two-step auto-transformer starters designed for continuous operation in the starting position; ?C unbalanced rheostatic rotor starters@ i.e. where the resistances do not have the same value in all phases; ?C equipment designed not only for starting@ but also for adjustment of speed; ?C liquid starters and those of the ""liquid-vapour"" type; ?C semiconductor contactors and starters making use of semiconductor contactors in the main circuit; ?C rheostatic stator starters; ?C contactors or starters designed for special applications. This standard does not deal with components contained in contactors and contactor-based motor-starters@ for which individual specifications exist. NOTE 1 Thermal electrical relays are covered by IEC 60255-8. NOTE 2 High-voltage current-limiting fuses are covered by IEC 60282-1 and IEC 60644. NOTE 3 Metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV are covered by IEC 62271-200. NOTE 4 Disconnectors and earthing switches are covered by IEC 62271-102. NOTE 5 High-voltage switches above 1 kV and less than 52 kV are covered by IEC 62271-1031. The object of this standard is to state a) the characteristics of contactors and starters and associated equipment; b) the conditions with which contactors or starters shall comply with reference to: 1) their operation and behaviour@ 2) their dielectric properties@ 3) the degrees of protection provided by their enclosures@ where applicable@ 4) their construction@ 5) for controllers@ interactions between the various components@ for example SCPD co-ordination; c) the tests intended for confirming that these conditions have been met@ and the methods to be adopted for these tests; d) the information to be given with the equipment or in the manufacturer's literature."
IEC 62271-106:2011 history
2021IEC 62271-106:2021 High-voltage switchgear and controlgear - Part 106: Alternating current contactors, contactor-based controllers and motor-starters
2014IEC 62271-106:2011/COR1:2014 High-voltage switchgear and controlgear - Part 106: Alternating current contactors, contactor-based controllers and motor-starters; Corrigendum 1
2011IEC 62271-106:2011 High-voltage switchgear and controlgear - Part 106: Alternating current contactors, contactor-based controllers and motor-starters
IEC 62271-106:2011 High-voltage switchgear and controlgear - Part 106: Alternating current contactors, contactor-based controllers and motor-starters has been changed from IEC 60470:2000 High-voltage alternating current contactors and contactor-based motor-starters.