Explore BrainMass
Share

# The Value of the Capacitor Size

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

An electrical supply company charges its consumers a penalty if their reactive energy consumption (Kvar-hour) exceeds half their true energy consumption (Kilowatt-hour).

Calculate the value of the parallel capacitor required to be installed at the factory to avoid the penalty.

I know that:
Apparent power S = 32594.05
Active power P = 26535.32
Reactive power Q = 18927.46

Using the formula:
C = 1/w [1/Zt * Sin Q - 1/Zt * Cos Q * Tan Q]
I get C = 0.000181

How do I get P or S from the following:
The supply is 240 Volts ac at 50Hz.
The total load impedance is Zt = 3.04 at 35.5 degrees.
The power factor is 0.81.

https://brainmass.com/engineering/electrical-engineering/173260

#### Solution Preview

I = V/Z

P = sqrt(3) * V * I * Cos(theta)

= sqrt(3) * ...

#### Solution Summary

This solution calculates the value of a capacitor required to be installed at a factory and the variables required.

\$2.19