![]() There was a lot of discussion of a similar subject in thread237-278636: How to calculate motor capacitance?Īs mentioned there, you could get a ballpark estimate for a form wound machine if you knew the number of slots, slot dimensions (Area = slots * 2*L*depth+L*width), ground insulation thickness (d) and ground insulation dielectric constant (epsilon, somewhere in the range 2-4 times epsilon0) simply using C = epsilon * A / d.Īlso one reference tabulated in that thread tabulated zero sequence capacitance (which I’d interpret as the same capacitance you’re interested in for testing… capacitance of entire winding to ground) for a handful of motors of various ratings.
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