Codes & Standards - Purchase

CAN/CSA-C22.2 NO. 60947-4-1-07 (R2012)

Low-Voltage Switchgear and Controlgear - Part 4-1: Contactors and Motor-Starters - Electromechanical Contactors and Motor-Starters (Tri-National standard, with UL 60947-1A and NMX-J-290-ANCE)

SKU: 2418581 Published by CSA Group Publication Year 2007 Reaffirmed in 2012 220 pages

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Preface/Scope

This is the common ANCE, CSA, and UL standard for Low-Voltage Switchgear and Controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters. It is the second edition of NMX-J-290-ANCE, the first edition of CAN/CSA C22.2 No. 60947-4-1, and the second edition of UL 60947-4-1A. This edition of UL 60947-4-1A supersedes the previous edition of UL 60947-4-1 published on April 20, 2004.

This Standard is based on IEC Publication 60947-4-1: Edition 2 (2000), Low-voltage Switchgear and Controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters, as revised by the corrigendum (July 2001). IEC publication 60947-4-1 is copyrighted by the IEC.

Scope and object

This part of IEC 60947 applies to the types of equipment listed in 1.1 and 1.2 whose main contacts are intended to be connected to circuits the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c.

Starters and/or contactors dealt with in this standard are not normally designed to interrupt short-circuit currents. Therefore, suitable short-circuit protection (see 9.3.4) shall form part of the installation but not necessarily of the contactor or the starter.

In this context, this standard gives requirements for: - contactors associated with overload and/or short-circuit protective devices; - starters associated with separate short-circuit protective devices and/or with separate shortcircuit and integrated overload protective devices; - contactors or starters combined, under specified conditions, with their own short-circuit protective devices. Such combinations, e.g. combination starters (see 3.2.7) or protected starters (see 3.2.8) are rated as units.

Circuit-breakers and fuse-combination units used as short-circuit protective devices in combination starters and in protected starters shall comply with the requirements of IEC 60947-2 and IEC 60947-3, as the case may be.

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CAN/CSA-C22.2 NO. 60947-4-1-07 (R2012)

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