Why Neutral Current is Zero in a Balanced System: How to Represent Neutral Current Using Waveforms

In this video we look at another way to represent the relationship between the current in each phase of a three phase system and the neutral current. The graph that I use in the video is available at the following link: www.desmos.com/calculator/sej...
#joerobinsontraining #Electricaltrainingvideos #scienceandprinciples

[@cpchris2]

Excellent love the way you teach brother.. iv done the electrical trade course here in Australia and yes we did all the phasor drawings about 3 phase neutral current but this calculator is absolutely fantastic.. thank you .. keep up awesome work buddy

[@jamesward9570]

Brilliant

[@adithyarajapakshe3791]

Thank you very much Joe! Highly appreciate it!!!!

[@ghostphalanx]

I was considering finding some software to try the same experiments until I came along this video and it was exactly what I wanted to see!

[@no_short_circuit]

Thanks Joe. Fantastic piece of software. If I'm honest I prefer your other explanations of how the current in the N of a balanced 3-phase is zero.

[@gbelectricks]

Great explanation Joe. Could you explain the dangers of loss of a neutral on a 3 phase electrical system, with unbalanced loads connected to a distribution board. Say if the neutral was broken out in the street, but all the neutrals were commoned together on the same neutral bar, would you get effectively 400 volts appearing on single phase equipment?

[@GSHElectrical]

👏

[@chrishall2594]

But why is this happening? Are the magnetic waves cancelling out the neutral or is current returning along the hot wires only?

[@edwardsalazar8058]

Joe in a balanced 4-wire system,how come the line to neutral waveform is still a sinewave if there is no current in the neutral? If there is no neutral current then line to neutral waveform is halfwave only..

[@JoeRobinsonTraining]

Great question Edward, the sine wave for current doesn't represent what's happening between two conductors it represents how much and in which direction the current is flowing through any conductor. So to take L1 as an example, the current flows in one direction down the conductor and gets bigger and bigger and then drops off, changes direction in the conductor, gets bigger, drops off again and then repeats, and repeats and repeats...