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- เผยแพร่เมื่อ 27 พ.ย. 2016
- This video will walk you through all the equations that you need for 3 Phase circuits and Transformers.
3 Phase Circuits Playlist: • 3 Phase Circuits (Adva...
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I can only assume VA is being calculated for 3-phase loads, right? In other words, calculating VA's for a circuit only involving 2 of the lines would not include the root 3 multiplier, correct?
Follow up question: if only using 2 of the lines, would you consider that a single phase when no neutral is involved, since the two windings essentially become one? Of course voltage, in this case, would be line voltage (not 'phase') but the load would be experiencing a single sine wave of current, correct? Can't really have more than 1 phase with only 2 wires, is my thinking. Reference is king.
Correct... and correct
I've been an electrician for 28 years, I just came across your series of videos on theory and ladder diagrams you do a tremendous job of explaining all of this and not over complicating it. I would higly recomend any of your videos you are one of the best instructors I have found out there.
Thanks so much for the nice comment Nick. I wish i had the experience that you have. All the best. Pete
These videos are a lifesaver. I fell behind in my circuits & systems class and this is really helpful. Thank you!
Glad the videos are working out for you.
the 240/416 is in Australia for the common voltages
127/220V and 220/380V in Brazil. Great video btw!
230V/400V in Europe and Australia, though we still see 240 V or more very often at the terminals. Harmonisation created a reduction to 230 nominal voltage which is probably a good thing.
In the U.K. it’s 415/240V or 690/400V in industrial applications. Really like the videos, very good explanations
In the U.K. it can also be said that it’s 415/240 at transformer but 230 at load due to distance from transformer to end user.
I have an interview for a design engineer for a utility company in a couple days. Your videos are awesome, thank you!
Best of luck!
This was really helpful. Just got me an extra 5% in my exam. Winning
Excellent!
Wow
asia, Australia, NZ Fiji, solomon Islands, New Guinea, Malasia, Singapore- all use 240 v. Thanks for very educational video,
Awesome. Thanks!
@@PeteVree Concur with Barry, Greetings from Papua New Guinea(PNG). We use 240Vph/415VL in PNG. Thumbs up for this video.
Thanks for the video it came in handy when I was sick and couldn't make it to the class
Thnx Pete, you're really helping me out! Keep up the good work!
I have one side note, isn't it that
I(line) = I(phase) = (U(phase)) / Z ?
Might be helpfull as well...
For sure. FYI there are some calc's available on the same playlist as this video: th-cam.com/play/PLyL0ResmI4Q1bG7CZDJFdZdEMqxixuW7l.html
New Zealand uses 240/416 volts. Very informative video.
Thanks Steven. Always wondered where 240/416 was used. All the best. Pete
That was an informative comment!
Europe, Africa, and the rest of the world use 230/415 - 240/416
That's very Coo! Thank you, Pete.
Great videos! Thanks! I have a test this week, These videos help
Excellent. Good luck on your test!
Thank you...and happy new years...🗯💥
Happy New Year to you as well. All the best. Pete
Thanks! Very well explained.
Another great instructional video
7200/12470 is a transformer I've seen quite a few of.
Thank you for the wonderful tutorial
How to know the PF
Europe has 220Vph - 380Vline (Ukraine and all EU)
And 480V from the sub
Thanks very much SR.
great video but by drawling your phase voltage across phases would give you a higher voltage going phase to phase I would specify that it is just phase voltage or phase to ground voltage vs phase to phase voltage.
I was quite clear that any voltage on the inside is a Phase value, any value on the outside is a Line value. There is no "phase to phase voltage", it is a Line to Line voltage. I am not disagreeing with you, rather I believe we are saying the same thing.
Thank you for sharing ,very informative
Like your explanation, however, how would you calculate the total power coming from a 3-phase system vs a single-phase one? I have a problem deciding whether to go with a single-phase 32A breaker or a 3-phase system with 10A breakers in each line. How to calculate the total power available from the 3 phases vs the single phase?
អរគុណ
គ្មានបញ្ហា។ សូមអរគុណសម្រាប់ការអត្ថាធិប្បាយល្អ។ គ្រប់យ៉ាងគឺល្អប្រសើ។ Pete
In few words Excelent explanation
Great video! Thank you Sir!
240-416 you see in Downtown toronto in old buildings.
Thanks! Very well explained
my question what will happens if one fuse for one phase blown
i hope my question is clear
for delta and star also
you are awesome man, i was starting to lose hope
Thank you, this was very helpful
Pete
I would like to thank you for your Delta/star video was great
Could you please upload some problems from star/star, Delta/delta, delta/star and star/delta
Please
Look forward to hearing from you
Thx
Thanks for explanation.
Thank you so much sir..
great channel, respect !
THANK YOU! THANK YOU! THANK YOU! THANK YOU! THANK YOU! THANK YOU!
240 volts is used in Australia and New Zealand and I think Britain
230 in Aus
Great explanation. thank you...
Many thanks for your effort, however, in the middle east usually we have 220 V, or 110 V as a single phase to Neutral.
Thanks Tareq. My experience is limited to North America... however, if anyone is looking for International Voltage and Frequency values, here is a great link: www.worldstandards.eu/three-phase-electric-power/
220 to neutral or phase to phase? That's similar to the US, different of 7-10 volts.
Thanks for the video it really helped
Hi Pete, can you help explain more how the formula VA= (Vline) x (I-line) x (srqt of 3) was derived? Thank you.
Well Watts law is that Power = Volts x Amps .... for 3 Phase each voltage sine wave is offset by 120 degrees so root 3 is included in the equation. www.electricalpereview.com/square-root-three-3-electrical/
120/240 here in the USA also
240 = split phase 180 degrees apart.
thats single phase..
Alex Schoenherr there is 120/240 3phase also look into it
thats a delta-wye configuration.
Ugh someone got on to my account. (I got hacked I know nothing about this)
Great teacher
please give more info about motor connections on boards for trade test purpose with diagrams on
I don't have a specific video on motor connections, however, have a look at my Motors Test Review package and see if it helps. docs.wixstatic.com/ugd/c6c561_7f4f5b3b18b44ed58afc7a76fa35fc6e.pdf
220 V and 380 V in KSA..
i have some question the three vPhase are always the same value as well as in vline? thank you if you notice this one, and it will be helpful for me and i learned a lot to this video.
Delta is parallel, so Vline = VPhase... Wye is Series, so Iline = I phase
Awesome but one question... Why Canada is Canada and USA is America? Aren't you in the same continent?
Same continent, but the War of 1812 ensured that Canada uses 600V and the US uses 480V
keep it up
What hardware do you use to draw for your videos? My electrical instructor still tries to teach online using a mouse, and he is trying to get something that works better.
I was using a Microsoft Surface Pro. Way too expensive. Just have your instructor purchase a Huion H610PRO V2 Painting Drawing Pen Graphics Tablet ($80) and tell them to use Microsoft Whiteboard (free)
Hi I like your video
what would the difference be if we were using line to neutral voltages?
The line to neutral voltages are the Phase Voltages. V phase = V line / 1.732
Where did you get the software to do your presentations? The one that shows the calculator and the overhead.
I use a Microsoft Surface Pro. I prefer using Word, but One Note is better for drawing with the stylus that comes with the Surface Pro. The calculator I found using the links available in this video. th-cam.com/video/ZX6JoWShL8c/w-d-xo.html
How did you get the mural in your shop done, it looks great.
@@PeteVree the mural artwork was taken off the web and the images were projected with a DLP after color separating them into fewer colors. You then simply paint on the projected lines.
@@PeteVree thanks for this. I have a WIN10 PC with a touch screen so I will give it a go. I liked the presentation BTW.
Thank you
Why multiply with root 3?
Hi South Africa use 240v
Australia use 230v
Excellent. Thanks!
thank you
Thanks. What program do you use to write and draw?
I use a Microsoft surface pro and One Note
Hello Pete, can you translate these lectures into Arabic?
Tnx a lot..
Can you explain why there is only one path here?
It isn't exactly a Series circuit, but it help some people remember that I Line is equal to I Phase. There is only one path in our out of the outer connections of the Wye circuit. Where as the Delta has 2 paths at each external connection, so I describe it as a Parallel circuit where V Line is equal to V Phase. Hope this helps.
Shouldn't you order the lines clockwise?
Depends on which side of the Equator you are on. =)
Where is that square root of three coming from?
www.electricalpereview.com/square-root-three-3-electrical/
the coils from where the 3 phase generate from ? I think..
Impedancenetwork
This will be more difficult to try to explain than it really is but I'll try to put it into words step by step.
Right triangles and a little trig are where 1.73 comes from.
If you draw out phase "A" on the x axis and then draw phase "B" 120 degrees separated from phase "A", you have two sides of an isosceles triangle. Now let's say you draw a line to connect the points of phase a and phase b together, the isosceles triangle becomes visible.
The inside angles of a triangle =180, so 180-120= 60 degrees. There are a total of 60 left over degrees shared between the two points of the triangle A and B. 60/2 =30. This means there are 30 degrees at both ends.
We can use trig solving right triangles to show exactly where 1.73 comes from. Lets say the magnitude of each leg of our isosceles trangle is 1. We draw a 90 degree line to cut the isosceles triangle in half so we create two right triangles that we can solve using trig. Lets solve 1 right triangle at a time.
On the A phase portion of the triangle i said we have a magnitude of 1. This leg happens to be the hypotenuse of the triangle. Also known is the interior angle at the point which was 30 degrees. The trig functions we can try to use are; SOH(sin opposite hypotenuse) , CAH (cosin adjacent hypotenuse) and TOA (tangent opposite adjacent).
Our known leg was the hypotenuse, so we need to solve for the adjacent side of the right triangle. Trig functions CAH should give us everything we need to solve the equation. Cos30 = x/1. Solving the equation leaves you with cos30 x 1 = .866. Do the same thing on the other hypotenuse side for phase B and you get another .866. Add them together and you get 1.73 as the total magnitude of the bottom line of the isosceles triangle.
That is why we shorten all that up and just tell people to multiply by 1.73 to get the phase to phase voltage on a wye.
It's due to the 120 degrees separation of the 2 phaeses that creates a 30 degrees phase shift when you connect the two phases together.
240 is only 2 phase in americas houses
would be great to have you as a lecturer and not some foreign guy that I cant understand...
What is root 3
www.electricalpereview.com/square-root-three-3-electrical/
110/190 volts
By phase do you mean load value
Not in this instance. Phase is referring to the value on the inside of the circuit. (From a line conductor to the center star point)
Pete Vree I don't understand
Watch the video one more time. Phase values are on the inside of the Wye, Line values are on the outside of the Wye. I am not talking about load values in this video, strictly the voltage and current values inside and outside of the Wye.
K I think it's over my head a little lol I understand the line side coming in so are you referring to the phase as to the transformer is transforming
VA stands for what?
Volt Amps (the combination of Watts and Volt Amps Reactive VARs) Watts is heat and light, VARs is potential energy held on a capacitor or a coil, Volt Amps is what we pay for in a Commercial or Industrial scenario
@@PeteVree oh i see thank you
380 Vline==========220Vphase
220/380 algeria
Sir do u work at George brown college?
Yup.
🤣