What is a var or kvar - reactive or imaginary power explained
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- เผยแพร่เมื่อ 11 พ.ค. 2024
- 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).
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this intro made my day. Greetings from Italy
I had to watch this 2 dozen times for it to begin to sink in. Thank You
you are amongst the best teachers in youtube alongside electro boom
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.
Eaton, thanks again for great content.
Best explaination ever. Thank you so much
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.
Such a great video! you guys are doing a great job!
Very clear explanation. Thank you.
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?
Great Explaination.
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
Thanks for the explanations......
Great Video!
Great video. Thanks.
Very nice video because demonstrating with coceptual approching thanks a lot
Great content and video
Great one love from India 🇮🇳
Very nice explanation on reactive power...👏
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.
Great job
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.
Thanks to all of team
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.
Hi, I like your video. Thanks
This isn't a definition, but it helps people understand, VAR is like the foam on glass on a mug of beer.
Sir, needsyour help I need the illustrated power factor correction book, if you have kindly furnish one with my discounted price asap.
thank you
Thanks you
So you all held a zoom from the same living/bed/dining room?
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.
The intro made me lose brain cells, but the rest of the video was good.
best of all.... food digest very well here
Someone was asked to clarify at 9:49... :D
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?
Nah
It has nothing to do with that. ACs with inverters are using Variable Speed Compressors.
I 100 percent agree with you, and I try to make our people undrestand about VAR on My Channel, thanks for sharing
Great video! Showing this to my boss 9:36
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.
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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.
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
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
See 5.28.
✨👌
2:02 Hey Ricky Bobby! Put your hands down! th-cam.com/video/Nfv1FhdaBBk/w-d-xo.html ... 🤣😂.. I've laughed so friggin hard trying to watch this 🤣😂.. Great video.. Best part is Ricky Bobby.. 🤣😂
hi and thaks
We have 50Hz power in Asian , 220VAC
Its VAR or kVar capital letters
but in the cable that comes to your house there is no kvar it's just a regular ac current, no?
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
how did you get Mia Khalifa on the video
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.
Please talk faster next time. Also, make sure you take down the graphs before I have a chance to read them.
You can slow the video speed. It’s extremely necessary for videos like this
Just wow explained so clearly and with aids...
This explanation is not upto mark
"Element doesn't have time to cool down or stop shining" - wrong - wrong wrong wrong.
It seemed to make complete sense to me - what's the issue with that statement?
@@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
@@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?
I was really interested in watching this video, but the first 2 minutes were so stupid, I had to stop watching.