# Line Current for 30kW 3 phase motor

• Engineering

## Homework Statement

Calculate the line current required for a 30kW 3 phase motor having a power factor of 0.85 lagging if it is connected to a balanced source with a line voltage of 440V.

## Homework Equations

P=√3Vl*IlCos ∅
Il=$\frac{P}{√3VlCos ∅}$

P=Average Power
Il=Line Current
Vl=Line Voltage
∅=∅v-∅i=∅Z

## The Attempt at a Solution

Il=$\frac{30000}{440√3\times0.85}$=46.31A

NascentOxygen
Staff Emeritus

## Homework Statement

Calculate the line current required for a [strike]30kW[/strike] 33kW 3 phase motor
http://img7.imageshack.us/img7/8738/p0813.gif [Broken]

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http://img7.imageshack.us/img7/8738/p0813.gif [Broken]

That's what I thought. This book has plenty of errors. Although it hasn't stopped me from learning a lot.

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