Motor starting current
Motor starting current
(OP)
when sizing cables i looked at in work, i saw starting power factor at 0.3 and motor starting current x 7. i would like to know why this is the case, what losses indicate the 0.3 starting power factor and what losses indicate to multiply the starting current by 7. i have been browsing for an answer but i can't seem to find it. i am sure the answer isn't too complex so any help on an explanation would be appreciated.





RE: Motor starting current
The multiplying the current by 7 has to do with the fact that at starting the motor is in a locked rotor condition and has a very low impedance causing the increased current.
RE: Motor starting current