135 pains A tse phese, tgfr pole indusion motor has nameplate ratings of 5604 RM

Question

135 pains A tse phese, tgfr pole indusion motor has nameplate ratings of 5604 RMS 125A S Pshat-300 837 poles 8 nput Power Factor 0.8 a) What is the sip under nominal conditions? b) Assuming that rated power is maintained at the shaft under the above rated co the efficiency between applied input and shaft? c) Assuming that rated voltage is maintained at the motor terminals and rate maintained at the shaft, what is the necessary feeder voltage to a 3 phase transformer having a secondary referred impedance of 0.006+ j0.0s ohms

Explanation / Answer

It is common to express the slip as the ratio between the shaft rotation speed and the synchronous magnetic field speed.

S = (ns - na) 100% / ns

= (1000-837)/1000

=0.2

other details are not clearly visible

where

S = slip

ns = synchronous speed of magnetic field (rev/min, rpm)

na = shaft rotating speed (rev/min, rpm)

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