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Standard 60947-4-1, Edition 3

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: August 25, 2017
Summary of Topics b60947-4-1_3_20170825_sum.html

Subject 60947-4-1

Bulletin Dated: August 25, 2017

SUMMARY OF TOPICS

The following changes in requirements to the Standard for Low-Voltage Switchgear and Controlgear - Part 4-1: Contactors and Motor-Starters - Electromechanical Contactors and Motor-Starters, UL 60947-4-1, are being proposed:

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.

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