A 5 HP, 3 phase, 400v star connected squirrel cage induction motor meant to drive a milling machine. At starting, the machine takes the current about______
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At starting, the machine takes the current about 6.33 Amp
Explanation:
Data given:
The power of 3 -phase squirrel cage induction motor = 5 HP
Voltage = 400 V
Solution:
For 3- Phase induction motor:
Power = √ 3VL IL Cos θ
Power Factor Rating of I M , Cos θ = 0.85
Power = √3 x 400 x IL x 0.85
0r 5 x 746 = √3 x 400 x IL x 0.85
or 3730 = 588.88 x IL
IL = 3730/ 588.88
Line current = IL = 6.33 Amp
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