Type “1” and Type “2” coordination for contactors and motor-starters
Coordination for contactors and motor-starters acc. UL 60947-4-1
For many years, the UL 508 “Standard for Industrial Control Equipment” has been the U.S. standard for control products,
such as contactors, self-protected combination motor controllers and overload relays. Due to the market requirements in North America for more harmonization, UL collaborated with members of industry and the standard UL 508 for Industrial Control Equipment has been harmonized with selected sections of the IEC 60947 series, standard for Low-Voltage Switchgear and Controlgear.
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