IEC Contactors and Starters Frequently Asked Questions
IEC Contactors and Starters Frequently Asked Questions
| Question | My motor is turned on and off frequently, or used for jogging duty. Should I derate (oversize) the contactor? |
| Answer | Yes. The published AC-3 ratings are for typical industrial continuous use applications. Jogging or frequent operation will significantly reduce the lifespan of an AC-3 rated contactor. For these applications, you should select a derated (oversized) contactor, and select the overload protection based on the motor's full load current. |
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This item was last updated on 02-17-2004
Document ID: 1027
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