- #1

- 115

- 0

**Hi everyone,**

1. Homework Statement

1. Homework Statement

**Three inductors with 0.1 H each are delta connected to three phase ac newtork with 220V/50Hz. Determine Iph, IL, P, Q and Theta.**## Homework Equations

Showed at the attempt.

## The Attempt at a Solution

[/B]

XL=2*pi*f*L=31.4 ohms

Iph=Uph/XL=220/31.4=7 A

IL=1.73*7=12.12 A

Q=(Iph)^2 XL=Uph Iph sin(theta)

Since I don't have theta and I need to determine it in thte first place, I shall use he first law.

Q=(7)^2 31.4=1538.6 VAR

QT=3*Q=4615 VAR

Then, I shall substitute the value of Q in the second law to get theta.

sin^-1 (theta)=Q/Uph Iph=1538.6/220*7=87.55 ْ

P=Uph Iph cos(theta)=65.65 W

PT=3*P=196.95 W