What is a var or kvar - reactive or imaginary power explained

  Рет қаралды 81,022

Eaton

Eaton

Күн бұрын

What is a var or kvar? For engineers, electricians or anyone dealing with electricity, we ask them to take a leap of faith to believe and therefore understand electricity - something that we can’t see - but then we even go one step further to ask them to believe in imaginary power which, by definition, doesn’t exist - or does it? For us to understand what reactive or imaginary power is, this video focuses on the technical definition as well as several analogies so that hopefully, we can all come to an understanding of what a var or kvar really is. At Eaton's Power Systems Experience Center (PSEC), you can learn all about capacitors, inductors and reactive power and power factor (PF).

Пікірлер: 64
@lenz03
@lenz03 3 жыл бұрын
this intro made my day. Greetings from Italy
@navyretired230
@navyretired230 2 жыл бұрын
I had to watch this 2 dozen times for it to begin to sink in. Thank You
@Morphasella
@Morphasella 2 жыл бұрын
you are amongst the best teachers in youtube alongside electro boom
@JohnWilliams-qu8nr
@JohnWilliams-qu8nr Жыл бұрын
Well done folks, can't offer much to improve it! Thank you to the group of people who obviously had a clear goal of simplifying these concepts. It was particularly interesting and important, I think, to have the different visual analogies offered.....a very good instruction method.
@douglaswhalen629
@douglaswhalen629 2 жыл бұрын
Eaton, thanks again for great content.
@virtualtreadmillwalknature1488
@virtualtreadmillwalknature1488 Жыл бұрын
Such a great video! you guys are doing a great job!
@kritishrivastava3602
@kritishrivastava3602 2 жыл бұрын
Best explaination ever. Thank you so much
@jimmckelvey459
@jimmckelvey459 2 жыл бұрын
I totally agree. Overall, this is a great video! I liked the high-stepping analogy and I plan on using that in the future to help explain reactive power.
@new15ronaldo
@new15ronaldo 2 жыл бұрын
Very clear explanation. Thank you.
@kafeelahmed4671
@kafeelahmed4671 3 жыл бұрын
Great Explaination.
@terencelai7
@terencelai7 3 жыл бұрын
Thanks for the explanations......
@D.Hozzie
@D.Hozzie 2 жыл бұрын
Great video. Thanks.
@reuvenmoshe6712
@reuvenmoshe6712 2 жыл бұрын
ive been asking my teacher a millon times what kvar actually mean but she responde with no answer saying its not important thank you so much for explainig it in a very good way
@mostafakarandi363
@mostafakarandi363 2 жыл бұрын
Very nice video because demonstrating with coceptual approching thanks a lot
@MsBlkz
@MsBlkz 3 жыл бұрын
Great one love from India 🇮🇳
@mantaray4347
@mantaray4347 9 ай бұрын
Great Video!
@paulgirard3093
@paulgirard3093 Ай бұрын
Great content and video
@jaydeeppurohit3655
@jaydeeppurohit3655 4 ай бұрын
Very nice explanation on reactive power...👏
@kamelalshammari6249
@kamelalshammari6249 8 ай бұрын
Great job
@3phaseman
@3phaseman 2 жыл бұрын
Thanks to all of team
@rohitkasgar4840
@rohitkasgar4840 3 жыл бұрын
VAR/reactive power when viewed in the form of those power cycles which were initially shown,2 positive and 2 negative in one complete cycle(for purely inductive/capacitive) load. What do they represent in that waveform? Rms value of that waveform, avg value or what?
@sohailjanjua123
@sohailjanjua123 Жыл бұрын
Hi, I like your video. Thanks
@jonkocen
@jonkocen 2 ай бұрын
So I think a KVAR for my home would only level out the incoming current instead of having spikes when my AC compressor turned on. The KVAR would make up the difference needed by the compressor starting, then "refill" when the AC is in run mode.
@jamminwrenches860
@jamminwrenches860 2 жыл бұрын
My residential power provider has started charging for KvA which includes Vars. You stated power companies only charge large commercial for the wasted power. No even residential providers have learned a new way of increasing your electric bill without technically raising prices.
@dyson9422
@dyson9422 3 ай бұрын
This isn't a definition, but it helps people understand, VAR is like the foam on glass on a mug of beer.
@shashikumar2419
@shashikumar2419 2 жыл бұрын
thank you
@RightToWright
@RightToWright 2 жыл бұрын
Thanks you
@SampleroftheMultiverse
@SampleroftheMultiverse 7 ай бұрын
I know a welding fabrication shop that has problems burning up motor and other electrical systems problems. Would a capacitor bank system with variable tabs help them? is that something you sell.
@Haitao334
@Haitao334 2 жыл бұрын
Simple ! Either different PF in power calculation involve PF will be equal in KW "without cosider of Time". The power factor is the efficiency of performance. A 0.7 Pf is 70% of efficiency, another 0.98 is 98% efficiency. Imagine 2 biscuit machines with a 100 pcs/hour as reference with different pF. in production. An order in 980 biscults; 0.98 pf take 10 hour to complete the job, where a 0.7 pf take 12.256 hour to complete. Who is the winner instantly can be seen. By define of machine with manhour just can easily be explained as cost saving.
@okusitinotahitua1020
@okusitinotahitua1020 2 жыл бұрын
best of all.... food digest very well here
@Techsupport243
@Techsupport243 Жыл бұрын
The intro made me lose brain cells, but the rest of the video was good.
@mjeezyca
@mjeezyca Жыл бұрын
Great video! Showing this to my boss 9:36
@PrimaAqute
@PrimaAqute 2 ай бұрын
I 100 percent agree with you, and I try to make our people undrestand about VAR on My Channel, thanks for sharing
@khalidmorales3031
@khalidmorales3031 10 ай бұрын
Sir, needsyour help I need the illustrated power factor correction book, if you have kindly furnish one with my discounted price asap.
@altuber99_athlete
@altuber99_athlete 2 жыл бұрын
What, you’re asking a grandma and a kid what is reactive power? Lol. And reactive power is not imaginary, it’s real (as in a physical phenomena) and also a real number. In a two-terminal network or load operating in sinusoidal steady-state, the magnitude or absolute value of reactive power is the amplitude of the instantaneous reactive power, i.e. the maximum rate at which the oscillating energy flows. - 3:32 That’s not exactly apparent power. The product of instantaneous voltage and instantaneous current is instantaneous power, all of which are a function of time, and are the curves shown in the plot. Apparent power is the product of the RMS value of the instantaneous voltage and the RMS value of the instantaneous current.
@kennethmatthews8255
@kennethmatthews8255 3 жыл бұрын
So you all held a zoom from the same living/bed/dining room?
@mikeadler434
@mikeadler434 7 күн бұрын
👍👍
@lynnasia5801
@lynnasia5801 Жыл бұрын
✨👌
@mikkelschler1288
@mikkelschler1288 8 ай бұрын
Someone was asked to clarify at 9:49... :D
@lamemanlayman
@lamemanlayman 2 жыл бұрын
Is this why inverter ACs are energy saving? Because the condenser is running all the time (rather than repetitively starting/stopping), thus less reactive power consumed over time?
@michaelbee8263
@michaelbee8263 2 жыл бұрын
Nah
@klarnorbert
@klarnorbert Жыл бұрын
It has nothing to do with that. ACs with inverters are using Variable Speed Compressors.
@briankewber8233
@briankewber8233 2 жыл бұрын
hi and thaks
@rodmcmahon4829
@rodmcmahon4829 3 жыл бұрын
You say that the reactive power into a generator is only used to excite the field. This is wrong. The field is produced by DC not reactive AC. The generator supplies reactive power only by virtue of the load capacitance and inductance which alters the current phase wrt to the voltage phase
@umairabbasi63
@umairabbasi63 Жыл бұрын
He talked about motor and not generator. DC excitation is used in Generators to produce magnetic field which then moved by prime mover to produce rotating magnetic field
@rodmcmahon4829
@rodmcmahon4829 Жыл бұрын
See 5.28.
@phironosurvivors2069
@phironosurvivors2069 2 жыл бұрын
2:02 Hey Ricky Bobby! Put your hands down! kzfaq.info/get/bejne/hMymZKmZycemcp8.html ... 🤣😂.. I've laughed so friggin hard trying to watch this 🤣😂.. Great video.. Best part is Ricky Bobby.. 🤣😂
@lovemusik2836
@lovemusik2836 8 ай бұрын
We have 50Hz power in Asian , 220VAC
@reuvenmoshe6712
@reuvenmoshe6712 2 жыл бұрын
but in the cable that comes to your house there is no kvar it's just a regular ac current, no?
@jessicadymond1945
@jessicadymond1945 2 жыл бұрын
Hi my my actual name IS KVAR no cap that is my birth name sooo hi my name is kvar wilson it’s crazy I know AND AND my nickname is var no cap
@gilbertvanheerswynghels5246
@gilbertvanheerswynghels5246 5 ай бұрын
Its VAR or kVar capital letters
@jackjohansen770
@jackjohansen770 Жыл бұрын
how did you get Mia Khalifa on the video
@onazram1
@onazram1 Жыл бұрын
Just wow explained so clearly and with aids...
@brianrosnell3250
@brianrosnell3250 3 жыл бұрын
This video does not do a good job explaining this to someone who doesn't understand it. Lots of information very quickly without analogies or time to dissect the information. Useless.
@jamiemarshall8284
@jamiemarshall8284 3 жыл бұрын
"Element doesn't have time to cool down or stop shining" - wrong - wrong wrong wrong.
@TheGodpharma
@TheGodpharma 3 жыл бұрын
It seemed to make complete sense to me - what's the issue with that statement?
@jamiemarshall8284
@jamiemarshall8284 3 жыл бұрын
@@TheGodpharma That's not how it works. Just take a slow motion video near light source that runs on AC power, it will be flickering off and on. This video is littered with small inaccuracies that do make serious differences when engineering
@TheGodpharma
@TheGodpharma 3 жыл бұрын
@@jamiemarshall8284 if it’s a gas discharge or LED light then you’re certainly right, but a filament lamp - I don’t think so, for the reason he gave. Wouldn’t you agree that a hot filament would have to cool down in order to dim and flicker, and how can that happen 50 or 60 times a second?
@jinkhazama4114
@jinkhazama4114 6 ай бұрын
This explanation is not upto mark
@comic4relief
@comic4relief 20 күн бұрын
How so? Does not hold water?
@gregorykotoch5045
@gregorykotoch5045 Жыл бұрын
Please talk faster next time. Also, make sure you take down the graphs before I have a chance to read them.
@AkatoshGaming
@AkatoshGaming 2 ай бұрын
You can slow the video speed. It’s extremely necessary for videos like this
@elgato8119
@elgato8119 4 ай бұрын
I was really interested in watching this video, but the first 2 minutes were so stupid, I had to stop watching.
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