Electrical Engineering: Ch 13: 3 Phase Circuit (33 of 53) Power in a Balanced 3-Phase Circuit

[@SAJ-wk6hz]

I was not blessed with good professors who were able to teach me the 3-phase circuit properly due to the short time we always had with the curriculum. so whenever I heard the word 3-phase I always got a panic attack because I did not know or understand it proplery. watching your videos helped me plenty so I just wanted to thank you for making my life easier. (>T^T)>

[@MichelvanBiezen]

You're welcome!

[@Augustus1003]

Do you take examples from alexander sadiku .

[@ahmedsheta9189]

brilliant as always. thanks a lot professor for your vedios ❤❤❤

[@MichelvanBiezen]

Thank you. 🙂

[@ahmedsheta9189]

❤️❤️🥰

[@CatsBirds2010]

You are the Best and thanks.

[@MichelvanBiezen]

Thank you. Glad you are enjoying the videos. 🙂

[@robertb8417]

Can this be done using polar notation? I tried, but it didn't work too well. Magnitude was right, but not the phase angle.

[@MichelvanBiezen]

It should be possible. But some methods are easier than others.

[@robertb8417]

@@MichelvanBiezen Your method is better.

[@robertb8417]

And using line voltage (E) and line current (I), P = √3EIcosθ

[@Zuwwar]

Hi. This was very clear. But, is this formula for instantaneous power or for average power?

[@larryzdanis5377]

Since the power is contant, instantaneous power = average power, so the same equation works for both.

[@engineeringdecrypted9052]

thanks, sir

[@MichelvanBiezen]

Most welcome

[@mertay321]

i guess this voltages and currents are AC. before this video, it was DC right?

[@MichelvanBiezen]

Not sure what you man by "before this video", but yes, this video has AC voltage sources. For all 3-phase circuits it is necessary to have AC voltage sources.

[@reycarlosgutierrez9746]

Thank you very much, Sir.

[@MichelvanBiezen]

You are most welcome

[@capsulecorp6975]

I still don't get why sqrt(2)

[@dvaVivy]

Vrms = (Vpeak-peak/sqrt(2)) rearanging the equation you get Vpeak-peak = Vrms*sqrt(2)

[@getrekt6635]

That is becuase when the voltage is in the form of polar phasor format, the voltage before the angle is the rms voltage. Meaning Van=Vrms

[@muhammadyunus9381]

Sir i have not understood the fact that in single phase the power is not constant and that in 3 phase the power is constant? Arent the Iphase *Vphase also sinusoidal so thr three phase power is also alternating?

[@sangitpradhan6818]

its like when there is single phase the gap between two consecutive troughs is larger. when in three phase these gaps are filled by the crest of the additional phases. it appears to be constant

[@arvindkram647]

Eyry diyu

[@arvindkram647]

Eyry rutu