Thanks raghun. In your opinion doesnt the AC-3 rating cover off the characteristic as it is LRA starting and FLA stopping. We have found that pump motors have high amperage in comparison to the horsepower ie 45 amp FLA for a 5 HP 230/1/60 for grinder style. Selecting based on horsepower would...
Can you advise how you size your IEC starter sfor pump applications. Seems to be two schools of thought. Allen Bradley says it is based on horsepower while IEC says it is sized using AC-3 ultization catergory. Given the high amperage of submersible pump motors especially grinders it would seem...
Do you size your IEC starter on horsepower or based on the ultization category. For example for pump motors we use AC-3 ratings as there is typically not anymore than 3 to four starts per hour.
