Right Tinfoil, I agree with your last obversation. The voltage drop (flicker) is the same for the unloaded and loaded condition of the supply transformer.
For the rest of you guys who said more information is needed to answer the question, you need to step back and see the big picture. This...
Right, that's the way I see it. The transformer manufacturer rates his transformer to deliver the design voltage at the design kVA capacity. So, assuming other things equal (never a safe assumption), the worst-case motor starting voltage dip would be measured starting from a rated-voltage...
I disagree, I don't think more info is needed. The question is how does the steady state load on the transformer impact the instantaneous voltage drop due to the motor starting inrush current. Since the motor start is a transient condition, I would expect the transient reactance of the...
Given: A 40 HP elevator motor fed from a 300 kVA transformer. Assume across-the-line starter and neglect line impedances, etc. The question has come up re. how does the motor starting voltage drop change from the unloaded transformer condition to the loaded transformer condition? Assume no...
