Which relation governs fault level of supply in LV motors?

Q.  Which relation governs the fault level of the supply in LV motors?
If K – factor for number of motors started simultaneously started on the same bus
Sa – 3 phase fault level
M – Rated MW of any one motor

- Published on 28 Sep 15

a. Sa = K * 50 * M
b. Sa = K * 20 * M
c. Sa = K * 60 * M
d. Sa = K * 80 * M

ANSWER: Sa = K * 50 * M

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