I am looking for guidelines to help me size the control transformers for various magnetic starters. Size 00 to size 3 is typically for what I run into these days from Allen Bradley, GE, Square D, Westinghouse, etc. I cant seem to find too much data from the manufacturers. It seems that you need a higher VA rating to pull the mag in but once it is closed the power consumption is tiny. I have always erred on the high side because I have no specific guidelines.
Any insight?
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