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Standard 60947-4-1, Edition 3

Standard for Low-Voltage Switchgear and Controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters

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Standard 60947-4-1, Edition 3 Edition Date: October 17, 2017
Summary of Topics s60947-4-1_3_sum.html

Summary of Topics

This revision of ANSI/UL 60947-4-1 includes the following changes to “US only” requirements:

1. Harmonization of endurance test cycle rates for contactors, starters, manual motor controllers, manual motor controllers used as a disconnecting means and manual motor controllers used as tap conductor protection as a U.S. only national difference.

2. Harmonization of endurance test cycle rates for manual motor controller and manual self-protected combination motor controller as a U.S. only difference.

As noted in the Commitment for Amendments statement located on the back side of the title page, UL and CSA are committed to updating this harmonized standard jointly. However, the revision pages dated October 17, 2017 will not be jointly issued by UL and CSA as these revision pages only address UL 60947-4-1 ANSI approval dates.

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