How to Test Motor Start and Motor Run AC Capacitor of ac fan and compressor
ฝัง
- เผยแพร่เมื่อ 23 มี.ค. 2017
- In this video, I have tested a 440VAC 30 MFD start capacitor by using 4 different methods. So that if you don't have a Capacitance meter, still you can test the capacitors.
Previous Video:
How to Test Capacitors with and without Multi-meter.
• How to Test Capacitors...
01:13 [1st method:]
In the first method, I have tested the start capacitor without using any multimeter. If you don't have the multimeter or any small DC source then you can use this method. But you have to take proper safety precautions.
03:22 [2nd method:]
In this method, I have used a 20 volt DC source to charge the capacitor,
and a small DC load to discharge it.
04:37 [3rd method:]
In the 3rd method, I have used a multi-meter that has ohm scale, to test the start capacitor. with the above 3 methods, you can check the charging and discharging of the capacitor.
06:24 [4th method:]
In the last method, I have used a multimeter that has capacitance (Farad) scale to test the capacitor. This is the most accurate method for testing the capacitor.
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I've got an old motor with a start capacitor, the motor only hums when I try to start it. I cleaned the centrifugal switch contacts and it still only hums on start...... so I wanted to test the capacitor and that's how I wound up here. Now I shall go test the capacitor, I'll be right back with the results........ and I'm back and still alive .... the capacitor on the motor is DEAD, won't hold a charge after numerous attempts. Another capacitor I happened to have did hold a charge and a nice spark on the run and start side. I 'll order the correct capacitor for the old motor and see if that will get it to start properly. Thanks for the youtube. No telling how many motors go to the scrap yard when a new capacitor would fix them. Thanks again.
Thank you for the video.
I also have the 4 pin type, it's a cbb60 for a MacAllister COD2000FLS tablesaw.
After testing the cap, it seems to be okay, it's holding and releasing charge perfectly.
Looks like I need a new saw 🫠
Leaving the brand and model number here for owners who run into the same issue, so let's hope Google search leads them here 👍
The first way looks the best fun but please use a quick test block or similar. These are designed to temporarily connect things to the mains. Just makes it a bit safer for you. Thank you so much for posting:)
th-cam.com/video/YGSHcyWju9c/w-d-xo.html
But I have question,, if that dead dry battery acid use like they way done to use salt with water. So if you put salt with water for that dry dead Battery so you gona using only salt with water or u can put also acid in that battery?
thank you for valuable knowledge
Excellent amazing clear and understanding how to test different method on capacitor..... great video!! definitely will follow your videos.
Thank you for your feedbacks...
th-cam.com/video/YGSHcyWju9c/w-d-xo.html
Excellent. We can measure the capacity of 30uF using another capacitor. If we have another 30uF, we put them in series and we have 15uF. If we have one under 20uF, we measure it and we find the value = a, then we put it in series with the larger capacitor and we find the value = b, b
Looking all over for this . You solved my problem thanks
Hello my dear friend capacitor i think this copacitor is could running capacitor , starting capacitor is normally open in start motor, running capacitor is not open thrle motor is opperation..thank you for sharing tjid video..👇👇👇🤝🙏🏼
Great video, nice you shown 4 different ways. The first way looks to be the most fun.
Thanks for your feedback 😊
I knew three methods, but now, I know all about capacitors testing. THANK YOU.
Another Great Video... Thank You Very Very MUCH....
You are welcome...
Thanks for the video. How do you know if such a capacitor is actually faulty or needs to be replaced? I've got a garage door opener motor which no longer works, and I think the capacitor is dead... When I test with multimeter (3rd method) nothing happens at all on multimeter. Just stays on 0.0?
Great help, thank you.
You are welcome.
David Coro 77
I have a Crompton water pump of 1 hp, recently I replaced the capacitor with same MFD but my previous capacitor has two terminal or wire in it and the new one which I purchased has 4 terminal, can in install it to the new one?
Very clear and simple, thank you.
can this be connected to a battery for a moise trap, i had few of those from a ripped washing Machine
Excellent video. Thanks a lot for sharing those tips. The first method is somewhat "hair raising"! :)
Thanks for your feedback 😊
Hi. Thanks so much. You've save me around 4900 rupees
good video, thanks for info, well explained, can you please tell me how can I find out, how many uf capacitor is, if the label is not readable thanks
thanks for a good job. that you explain in different ways. I follow your job and look forward to more about other things i have idea but i don't know if it is appropriate to say publicly but if you want let me know
It's informative video. . Thanks alot
you are welcome
Thumbs up for anyone encouraging poking bare wires in a plug socket. Who needs a multimeter. Your balls are BIG
Simple and straight forward practical experiment on how to test a capacitor.. AWESOME...
Thanks. But if you have multimeter then refer this th-cam.com/video/QWCLPfIrp-4/w-d-xo.html
Nice video.. I need help :( I have a power washer, it was humming on start and not running, I had a larger capacitor in garage and changed it over, motor ran for a minute and blew up capacitor, it was rated over double uf.. Is it a start or run capacitor? There is only one so I assumed it was a start,.. I will send link to power washer pdf parts :) thanks if you can help
If no centrifugal switch connected in series with the capacitor then the capacitor remains connected during running period. Please always replace the capacitor having the same rating (uf must be same, voltage and temp can be higher or same) for both start and run capacitors.
nice
One of the best capacitor testing videos on TH-cam. Thanks!
8
Aside your simplicity and skills I enjoyed your videos Mostly because other videos out there were in hindi which many will not understand including me of course. Keep up, much appreciated👍👍
Hello. 😊Thanks for the good explanation. I have a question. I am going to replace a capacitor on a power generator, and am wondering if a normal starting capacitor can be used for this, or if there are special capacitors for generators? ( 18uf 400 - 450 volts 5% 17-10 w ) Thanks
thank you so much
Great informative video sir 👍 👍 👍
Thank you. This trick really useful for my trouble since I only have a multimeter without capacitance meter.
My air con capacitor shows still charge and discharge by the multimeter, but how can I know that the function is still good?
could you please explain third method (or please refer to link explaining etc...)?
how capacitor is charging without a source ?
The multimeter has a souce. Recall to measure resistance, you need v=IR, so the resistance of the capacitor increases with increase in charging and vice versa.
Great video...
Thanks for a great video in excellent English and explained so a novice can duplicate it.
Thank you very much. This was very helpful.
You are welcome 😊
Great video and very professional and good job 👏🏻
Thanks
I have a portable air conditioner that doesn't work. I have removed the start capacitor and tested the resistance and it's on overload no matter what ohm setting I put my multimeter on. I have tried charging it, and discharging it and it's always the same. Is it safe to assume the capacitor is dead?
It should be realized that when applying a capacitor to AC mains and removing it, there will be a DC voltage present.
The size of the voltage will be determined by when the supply was removed in the AC cycle. It could be anywhere between 0 and +/- 340V DC ( as the peak DC voltage is 1.414 times the AC RMS voltage,
My method is to connect the capacitor to a IEC lead, plugging it into a power point and switching the power ON and OFF briefly. I then remove the lead from the mains supply & I measure the voltage with the multimeter and look for a voltage >300 Volts. Discharge the capacitor by short circuiting it and repeat the process several times for voltage >300 Volts.
Then measure the voltage every 5 minutes or so & if the capacitor is still charged to the same voltage, you have a good capacitor. If not it is leaky to some degree and should be replaced.
Discharge the capacitor before removing it from the IEC connector!
I don't think we should be showing anyone "poking things into power points directly"
If you do this sort of testing a lot, make up a lead with insulated alligator clips (sometimes know as a suicide cord), but do not leave it lying around!
I am agreed.
What about this if we connect the capacitor in series with 220 volt A.C bulb of 60 or 100 watt?
what is the meaning IEC lead.
great video!
Thanks
Sir may I ask, if I have a motor starting capacitor for "Dough Mixer" of 80µF 10+20% 270V, and I have a reading of 85µF, shall I say that the capacitor is in excellent condition?
yes i did: thumbs up
Thanks...
Thanks for the very clear explanation. Thumbs up.
The world's best teacher thanks sir
Rất tốt, đã đang ký kênh.
Why you charge the capacitor for a fraction of a second only. Is there a problem if we keep in charging for hours?
Please can I change the capacitor of a summersible control box with a higher one with higher microfarad?
Thank you very much my friend.
Sir how to choose the capacitor in single phase motor and three phase motor in 2 phase condition adding of phase shifting
Excellent explanation. Very comprehensive. Thank you!
You are welcome
Sir minilec wlc d1 connection to the submersible starter diagram
Thanks for the info. Good explanation. Keep it up.
5%+/- deviated does it means i can no longer use them if it is higher by 5% micro farad from the stated?
Of course you can use it. It s just the error margin as specified by the producer.
Please note that, while doing this, I suggest that capacitor not to be connected directly even little time, since we want check capacitor is Ok or nor, there may be open or short internal, it should be always to be connected one series lamp with this, so the test will be safe, if not incase short, it will explode with no time.
How about polarity capacitor if there is negative and pacitive like 50 Volt ,100 uf
Please refer the following video for accurate testing.
th-cam.com/video/QWCLPfIrp-4/w-d-xo.html
Teachable i really lean something .
Thanks
Thanks, very helpful, I really appreciate that teaching, but I will really be happy too to get a line to contact you we needed;thanks.
You are welcome...
th-cam.com/video/YGSHcyWju9c/w-d-xo.html
thanks for info.
You are welcome 😊
22w cooler motor ko konsa capacitor laghye
2.2 uf
What is the voltage of the buzzer..?? Since the capacitor is of high voltage.
Thank you for your video. I did test the spark method. The spark was not as powerful as yours, does that matter? Can I conclude that my capacitor is good, even though the spark was not as powerful as yours?
It is always recommended to use multimeter for testing
@@TechStudyCell I don't have a reliable multimeter. I'm going to get one online
4:55 is it 200k ohms or 2000k ohms pls i would appreciate it i need to test a 45uf capacitor..tks
Good video, thanks! One question: when you measure, and connect back capacitor, can wires be in either location: there is no "plus and minus" connector, either way capacitor works !!!??? Thanks, youtheman =)
This is a AC capacitor, so there is no positive and negative terminal
@@TechStudyCell So, you can check it, or connect it either way, right??
th-cam.com/video/YGSHcyWju9c/w-d-xo.html
@@Eeropolvasti yes, correct. There is no +/- on the capacitor
You can charge capacitor by use a diode for high voltage. In this way you can charge at max voltage all the capacity.
yes. but I have tried to show the testing of a start capacitor without any component and tools.
Yes, I understand this, but you don't will have never the total capacity and so if the capacitor is very good or less.
@@mikr1334 You really don't understand.
Thank you, very informative!
Glad it was helpful!
I think its better you use a resistance in series
while connecting in mains and discharging
Which place I want purchase this type of multimeter... please help me?
sir! this is what happens to me alot: I follow the test procedure exactly; but I get an ol, always? and with THREE DIFFERENT DIGITAL METERS (TWO HAVE DEDICATED CAP MODES); on two each of start/run capacitors(one each, fresh out of the box!?), on a repaired motor (single phase), which said motor - in spite of the $270 "repair", still doesnt run. So, this is why I hate electronics - I hardly ever feel like I am getting anywhere... Can you help me? thanks...
You don't know how can check capacitor
Good work brother
Thanks
Yup. Fixed washer dryer , thank you Sir
Thinking Mans tv 👍👍🙏
Yours is the fourth video I've watched on the subject and by far the most helpful! Thank you.
Thanks for the feedback...
Thanks
Sir capacitor ka formola batiyan kitnay kw ya hp ka liya kitna uf capacitor chahiya
Yahan TH-cam py koi b nhi bta paye ga brother.
Very good knowledge you shared
Dude really brave wtf don't get shocked :)
Why it should be connected for fraction of a second ?
very nice .......
Thanks...
sir very useful this video thanks
You are welcome.
Does it matter which wire goes to live - neutral supply from first method 😁
Excellent! Thanks!👍
Thank you
welcome...
Helpful video. I did have to use the captions. My brain just isn't wired for that accent. Good video though.
Thanks...
Sir mene 1st method se check kia pr spark sirf wire pr tha
Capcitor m koi sound nhi!?
Very nice explnation
But i think 450v is running cap
Charging by dc it shoud less than second or no problem
If ihave two 110v capacitor can i connect it with 220v without problems
Thank u
5:53
increasing not decreasing !
for a 3 wires ac motor (common wire, start and run winding) which wire should be plugged to capacitor? is it right to plug the common from the motor to neutral, live to capacitor which the other wires are plugged to the two terminal of the capacitor? or live to common and neutral to capacitor?
Short the capacitor through series bulb. Discharge also through series bulb.
Thank you.
Electrics 101 Indian style...
"if it making sparks, everyting ok" 🤦🏻♂️
What will happen if I plug it much longer than a fraction of sec?
The method itself riskly. As the capacitance is high so high current will flow through it which can damage it. So connect it for a fraction of second to charge the capacitor.
Just viewed your video, thanks I appreciate it.😎
it is OK
Ok felicitari
Charge and discharge through a series bulb
Buy a new one.. you can test the old won using the continuity on your VOM to charge and test. Apply leads then reverse you should see a voltage kick if still good...
sir how to identify the starting and running capacitor
You can identify both capacitors by observing how they are connected with the starting (auxiliary ) and running (main) windings.
Starting capacitor will always have high capacitance, its start from 80-110 uF.
It should b connected with starting (aux winding) in series with clutch. Besides this the running capacitor is always cannected with one end of both windings.
You are brave to test like that. And much more experienced with electricity than I am. I'll call an AC tech instead; but thanks for letting me know how risky this can be.
first all thank you for the helpful video.Did helped me. second tank you for speaking english and not like other indian making great video but speaking hindi .how the hell would the rest of the world understand ? so thank you sir
It's my pleasure
@@TechStudyCell I am certain that fellow meant 'Second, thank you...' rather than 'Srcond tank......' good instruction. Quickly told us what to do and all about it. Great work, no confusion!
How to testing 3pole capaciter
Mani Mundan no such thing as a 3 “pole” capacitor .... you are probably dealing with a “dual” capacitor. A “duel” capacitor shares a common..... measure mfd from common to either side and see if you’re in range. Generally “C” will be common, “F” will be fan and “H” will be hermetically sealed compressor.
Can u tell me how can we know which teminal is positive or negative
For the AC capacitor, there is no positive or negative terminal, both the terminals are same.
Tech StudyCell my ac capacitor was blast somedays back. I got the new one so how can i connect it. Becoz i connected it bt ac compressor wont start. Only fan is working ..Pls help me
It is not possible to tell how to connect the capacitor without looking at the circuit diagram. First, identify the auxiliary winding and the main winding then connect the capacitor as per circuit diagram.
For AC Capacitor no positive and no negative.
SAFETY is number 1 I see..
UV suspicious toxic cup goncff
nice
Great vid like it 👍.
Thanks
Watch this video on How to use Multimeter:
th-cam.com/video/ABfpPCEZQvg/w-d-xo.html