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What is a Contactor? | Working Principles
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Күн бұрын▶ C'mon over to realpars.com where you can learn PLC programming faster and easier than you ever thought possible!
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⌚Timestamps:
00:00 - Intro
00:39 - What is a contactor?
00:55 - Why contactor is used?
02:44 - Contactor vs. relay
03:39 - How to wire a contactor
03:43 - 1) Coil terminals
04:53 - 2) Contacts terminals
05:55 - 3) Auxiliary contact terminals
06:10 - How does a feedback contact work?
07:08 - How to wire a contactor to the PLC and motor
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In this video, we will explain what a contactor is, how they work, how to wire a contactor, and the difference between a contactor and a relay.
A contactor is a device that is for making and breaking an electrical power circuit. For example, we usually use a contactor for turning on and off an electrical motor.
Why do we need to use a contactor? Can't we connect the motor directly to the PLC? Well, the short answer is no. Because you don't want to connect a high voltage electric motor to your shiny expensive PLC directly. This will damage the PLC cards if there are any electric surges on the motor's side.
We use a contactor to connect the PLC to the motor indirectly and safely. All contactors have a low voltage coil. We connect the PLC output to this coil. This coil usually works with a 24-volt DC signal.
Once the coil is energized, an electromagnetic field will be created. This electromagnetic field then causes the contacts to be closed and that's how the 3-phase power will reach the motor and can turn it on. So, there is no electrical connection between the coil and the contacts.
In the normal state and when the coil is not energized, the contacts are open and when a 24-volt DC signal is sent from the PLC, the coil will be energized, the contacts will close and the motor turns on.
A relay works the same way as a contactor. That means a relay also has a coil and some contact. When the coil is energized, the contacts will close.
But here is the difference... a relay is usually used for smaller devices with lower current and voltage rates. A contactor, however, is used for bigger devices with higher current and voltage rates.
Let’s talk about the wire terminals on the contactors.
1) On the front of the contactor, we see two wire terminals of A1 and A2. This is where we can connect a 24-volt DC power to the coil to energize it.
The coil may work with different voltages such as 12-volt DC, 24-volt DC, or maybe 220-volt DC.
Depending on the type of the contactor, the coil can also work with a 24, 120, or 220-volt AC power.
2) On the other side of the contactor, we have six other wire terminals. The wire terminals on the top are labeled from left to right with L1, L2, and L3. The wire terminals on the bottom are labeled from left to right with T1, T2, and T3.
The L1, L2, and L3 terminals are where the power wires connect to the contactor. The T1, T2, and T3 terminals are where the device wires connect to the contactor.
3) We have another set of wire terminals on the front end labeled as NO or normally open. This is a simple normally open contact referred to as an auxiliary contact or a feedback contact.
This contact is used to send a signal to the PLC input about the contactor's health. When the coil is energized and the three main contacts are closed, the feedback contact will be closed as well and send a signal to the PLC input.
We have discussed this more in our level 2 PLC programming course and there is a sample PLC program that shows why we always need to use a feedback contact and how to use that contact in the PLC program to get notified when the contactor is broken: bit.ly/36P7cbd
You also need a start and stop switch to be connected to the PLC input.
- When you press the start switch, the coil will be energized, the contacts will be closed and the motor will be turned on.
- When you press the stop switch, the coil will be de-energized, the contact will open and the motor will turn off.
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#RealPars #Contactor #PLC
@anonymous2554 3 жыл бұрын
It's been more helpful this channel than my career in more than one aspect.
@realpars 3 жыл бұрын
What an amazing compliment! Many thanks
@diwasshah7545 Жыл бұрын
Totally Agree 🙏
@leandroalmeida9689 3 жыл бұрын
I'm going through the greatest challenge of my life: becoming an automation engineer in a industrial plant. I've got a degree in electrical engineering, which was more related to power supply systems, but not so much to automation... however, I accept the challenge anyway! And I have to thank You for sharing this knowledge in a so wonderful way! It's been very helpful for beginners like me!
@realpars 3 жыл бұрын
We truly appreciate your support, Leandro! We're happy to hear that our video courses are helping you. If you have any questions along the way, please feel free to reach out.
@kenmichaels6595 Жыл бұрын
Probably one of the most lucid presentations on contactors I've run across. Great job!
@realpars Жыл бұрын
Thank you very much, Ken! Much appreciated
@mahuk. 3 жыл бұрын
So glad I found this channel when I was starting my career. Your videos are always so easy to understand with the good narrative and the images. Than you so much. One day I'll come back to buy your courses even if I don't need them at that point.
@realpars 3 жыл бұрын
Amazing compliment, many thanks!
@iliapopovich 3 жыл бұрын
Very well explained in American-English, recently I did a L3 PLC programming in UK and it was horrible. Anyway, I took the certification...And by the way regarding the contactors and relays, you can always put three relays instead of a contactor for some small motors temporarily, just check the ampers. I have an Arduino controller with 230v 10A ,very small relays working even on 3.3v DC, so with them, I can easily switch On/Off a 1000W , 450V motor.
@aryanrathi4876 4 ай бұрын
What if only one phase trips? Wouldn't that cause phase imbalance?
@od1351 10 ай бұрын
These videos are great,although you can be in maintenance field for many years it’s always some details and concepts you may miss but going back and studying and just doing a little research clears up a lot of the fog that can be in you’re head about certain things
@realpars 10 ай бұрын
Thank you very much! We're very happy to hear that.
@bmtamer77 3 жыл бұрын
In the past year I have seen many Hvac videos. This is by far one of the best channels I subscribed to. I promise to share with some of my school mates. Thank you sir! Respect and keep the knowledge flowing on a high pressure gauge!
@realpars 3 жыл бұрын
Thanks for sharing!
@davidalvarado7944 3 жыл бұрын
This was so helpful and helped me embarrass my lead for trying to troubleshoot a broken contactor incorrectly when it was working just fine!!! thanks a bunch RealPars
@realpars 3 жыл бұрын
You're very welcome, David! Glad to hear that our video course has been helpful!
@Sanjay.M.Pillay 2 ай бұрын
I am in industrial automation domain from last 2 years and have referred many videos. But the quality and vibrancy of Realpars videos us exceptional ❤
@realpars 2 ай бұрын
Thank you so much!
@eugenepohjola258 3 жыл бұрын
Howdy. Nice basic knowledge. However. I would be reluctant to connect a contactor coil directly to a PLC output. I would use a relay in between. Also a backfire or free-wheeling diode over the contactor coil is mandatory with DC. There is a lot of induction in the contactor coil when engaged. This energy will rapidly burn the relay or PLC card contacts if not managed. With AC the backfiring problem is not as big but some backfire managing is still necessary by a suitable RC filter over the coil. Typical values are R = 100 ohm and C = 100 nF 500 V in series. Regards.
@realpars 3 жыл бұрын
Thanks for sharing your knowledge and experience with us! We always appreciate such comments.
@eugenepohjola258 3 жыл бұрын
@Mindaugas Vaitiekūnas Yes. The backfire diode is a good solution in most cases. It is sometimes experienced that the contactor disegages too slowly as the back current takes too long to dissipate in the coil and the diode. A solution to this may be to use, say, 7 diodes in series. This will force the back induction to rise to about 5 V and provide a faster dissipation. The output transistor will see a voltage of 24 V + 5 V, or some 30 V but it will most likely tolerate that. One could consider using a regular diode and a 5 V zenerdiode in anti series but it is not recommended. Zener diodes are slow and will allow the build-up of a high spike before going into conduction. For the same reason Schottky diodes cannot be used. Regards.
@Xaerorazor0 3 жыл бұрын
If I remember correctly, contactors use a bar across two contacts per line where it can split the voltage to prevent arcing, whereas a relay uses only one point where it will experience the full voltage drop across the contacts, when opening the circuit, so a relay will take damage when opening a higher voltage/higher current source when the contactor is designed to split the voltage across the 2 contacts and reduce possible damage from arcing.
@sjholmesbrown 3 жыл бұрын
This is correct. The contacts in a contactor are also larger than a small relay and have contact surfaces designed for higher currents. Often the contacts in a contactor will also 'wipe' or rub across each other slightly as they close, this serves to clean off slight oxidation traces and keep the contacts fresh.
@danielfranchette5547 3 жыл бұрын
the double breaking does not cancel the electric arc but helps to extinguish it, which will define the breaking capacity of the contactor. Much of the complexity of contactor design lies in implementing different arc breaking techniques in a minimal amount of space. it is this electric arc which determines the electrical life of the contactor (because of the progressive degradation of the contacts) which is much less than its mechanical life which is often around ten million operations. The electrical life depends on the type of load supplied by the contactor. An inductive load will generate larger arcs than a resistive load and decrease the longevity of the poles. The contactor manufacturer gives life curves as a function of use to provide for the replacement of devices.
@ricardogarcia3900 3 жыл бұрын
Great video. Remember one thing. You must connect a thermal relay in series between the outputs of the contactor and the inputs of the motor, plus the output that indicates a overload as a signal to PLC.
@miguelzavaleta1911 3 жыл бұрын
At that point why not just use a VFD instead?
@Cleofizoid 2 жыл бұрын
...and now you have a motor starter and not a "contactor".
@daruscole1586 Жыл бұрын
I Praise God and thank those who have designed and worked on (and may continue to do so) such things as this to make things safer and to help prevent damage to other things. I imagine that some or all of the specifics to the design of such things may have required much work and testing. God Bless them.
@QuestionableAdviser_ 3 ай бұрын
When a YT video explains much more clearer than my Engineer Teacher.
@samalfellah2066 2 жыл бұрын
Amazingly simple and interactive way of explaining.
@realpars 2 жыл бұрын
Glad it was helpful!
@I_name_All_my_guns Жыл бұрын
I'm not an engineer but in hvac school. This video really helped. Thank you!
@realpars Жыл бұрын
Glad to hear that!
@tiagogamas7990 Жыл бұрын
Excellent video by RealPars!
@realpars Жыл бұрын
Thank you very much!
@user-ge9gi7fu3j 10 ай бұрын
Well thought out clear and concise presentation thanks very much
@realpars 10 ай бұрын
Glad it was helpful! You're very welcome.
@dmj777 4 ай бұрын
What an excellent explanation of how a contact operates!🤩
@realpars 4 ай бұрын
Thank you very much!
@ashutoshsawant7013 3 жыл бұрын
I have been waiting for contactor vs relay video since long. Thank you for this.
@realpars 3 жыл бұрын
Glad to hear that! You're very welcome.
@spacexnix Жыл бұрын
this video explained the essence to me more than anything existing on KZfaq
@realpars Жыл бұрын
That's amazing to read! Thank you so much for your kind support
@ekhlaskhan1356 3 жыл бұрын
I am from Bangladesh and EEE engineer.ur video helps me a lot
@realpars 3 жыл бұрын
Glad to hear that! Happy learning
@Bonejone213 3 жыл бұрын
Love this channel
@realpars 3 жыл бұрын
Thank you!
@thomas8230 10 ай бұрын
Why did I only come across your channel now? Very well explained. Thanks
@realpars 10 ай бұрын
Glad it was helpful! Thank you very much
@sivaramank5016 3 жыл бұрын
@8.10 normally stop switches will be NC..but in this video it is represented As NO
@realpars 3 жыл бұрын
True, Stop pushbuttons are normally NC contacts. However, for some installations, the START and STOP pushbuttons are both NO contacts brought into a PLC DI card, as in the video. In other installations, a single NO pushbutton is used to both START and STOP a motor. For single machine installations or shop-type installations, NO contacts are sometimes used when the E-STOP is in close proximity in case of failure.
@xxcrazymanxx1001 Жыл бұрын
Thank you so much for making this video I'm just starting my career in this feild and this video was very simple and helpful
@realpars Жыл бұрын
Glad it was helpful!
@sjholmesbrown 3 жыл бұрын
A small correction for you. You stated a couple of times that most contactors use 24VDC for their coil. While these are used, the great majority I have seen in industry use 120-400VAC for their coil, with an interposing relay to convert the PLC's 24V output to a high voltage AC output for the contactor coil. I also would not directly connect a PLC output to a contactor unless they were specifically rated for it, as they are an inductive load and can generate large voltage spikes when turned off.
@realpars 3 жыл бұрын
Thanks for sharing that, Stephen!
@shreyashsb5389 2 жыл бұрын
I'm very confused about those,now I'm cleared. thank you
@realpars 2 жыл бұрын
Glad to hear that this video course helped you clear out the confusion. Happy learning and keep up the learning curve :)
@natesansrinivasan2590 2 жыл бұрын
This channel is really damn helpful for technician and engineers working in industries..
@realpars 2 жыл бұрын
We're very happy to hear that, Natesan! Always feel free to leave us your questions if anything is unclear. Thanks a million for your support!
@thewarlordscalling6537 2 жыл бұрын
PLC stands for Programmable Logic Controller. They are industrial computers used to control different electro-mechanical processes for use in manufacturing, plants, or other automation environments.
@linetyo8769 Жыл бұрын
I'm very appreciated that you did this video. It's very helpful. I got the power & courage again. Thank you. I'll keep studying.
@realpars Жыл бұрын
Glad to hear that! You're very welcome.
@ernestoterrazas1132 3 жыл бұрын
Hi! I really like your videos, congratulations for the excellent manner in which they are presented. They are an excellent training resource! One question: I keep seeing in your videos that you mention a -24V DC connection when in reality it should be 0V (M in schematics). When you say +24V in the positive connection, and then -24V in what should be the 0V (M), it gives the wrong impression of a net 48V potential across the supply of the contactor coil. I've seen other of your videos that also have this mistake (not exactly of contactors by the way). Am I missing something?
@realpars 3 жыл бұрын
No, you are not missing anything. Having designed and installed hundreds of panels over my career, I have seen a few different ways to identify the negative, or common, connection for 24VDC circuits. Technically, the return leg, or more negative connection, in a 24VDC circuit is identified as 0V, earth potential, or COMMON. However, some like to identify the common terminal as the (-) terminal or the negative terminal of the 24VDC circuit (-24VDC). This designation is designed to separate it from other grounds or earth potentials.
@Cleofizoid 2 жыл бұрын
I always say "DC Common" or "DCC".
@kasondensofwa4184 2 жыл бұрын
Very lucid and audible, your videos are the best. How I wish you could have established a training center in Africa for hands on training 🤷🤷🤦 Kindly also do a video on electronic modules 🙏🙏
@realpars 2 жыл бұрын
Thanks for your kind comment, Kasonde! I will happily pass your topic suggestion on to our course developers.
@billmichae Жыл бұрын
The very best video on this topic!
@realpars Жыл бұрын
Thanks a lot, Bill!
@RiaziMohandesi Жыл бұрын
Very simple and understandable explanation thank you realpArs
@realpars Жыл бұрын
Glad to hear that, Ahmad! Happy learning
@prakash4826 3 жыл бұрын
Impeccable teaching, thank you ❤️
@realpars 3 жыл бұрын
Glad it was helpful!
@user-ru1nm7fm6v 2 жыл бұрын
RealPars you best! Real learn videos! Thanks!
@realpars 2 жыл бұрын
Glad you like them!
@rico2207 Жыл бұрын
Perfect animation
@realpars Жыл бұрын
Thank you!
@oficinadoeletricista 2 жыл бұрын
Exceptional full scope of the content on the blog about the information about the contactors. Congratulations on your exquisite work.
@realpars 2 жыл бұрын
Many thanks!
@katuraysalad Жыл бұрын
Thank you very much for this video
@realpars Жыл бұрын
Glad it was helpful! You're very welcome
@clenlima 3 жыл бұрын
Thank you! I'm from Brazil.
@realpars 3 жыл бұрын
Our pleasure!
@gifarihasyim7776 2 жыл бұрын
This video saved my careers. By the way, I have a question. Does A2 also connect to PLC? If yes, is the voltage connected to A2 have value of -24 V?
@realpars 2 жыл бұрын
A1 and A2 are the to connections in the contactor that actuate the coil, which in turn pulls in the contactor and allows current to flow from L1/L2/L3 to T1/T2/T3. As the video explained, the PLC I/O cards are not powerful enough to actuate the motor directly, so we use a contactor with a low-voltage coil, in this case a 24VDC coil. A1 is connected to +24VDC at the I/O card (the digital output terminal) and A2 is connected to 24 Common. Sometimes we refer to the common terminal as -24VDC, but it is truly a ground, or 0V potential point that is shared with the power supply. So when the digital output is energized, 24VDC flows to A1, and the coil is energized, pulling in the contactor. A connection to A2 is required to insure a steady 24VDC is applied to the coil (e.g., form a complete circuit).
@themuddyrug55 2 жыл бұрын
Very informative video, and you explained everything with no way to misinterpret the information. Very nice!
@realpars 2 жыл бұрын
Glad you enjoyed it!
@sbmtech8920 3 жыл бұрын
Now am clearly understand about contractor and relay thank u realparas
@realpars 3 жыл бұрын
Glad it helped!
@Amscid007 3 жыл бұрын
Well explained, but I would have loved to know how the start and stop buttons are connected from the PLC via the 24VDC down to the Contactor.
@realpars 3 жыл бұрын
Hi Ehimemen, Thanks for the topic suggestion, I will definitely go ahead and forward this to our creator team. Happy learning!
@sjholmesbrown 3 жыл бұрын
kzfaq.infosearch?query=starter Here is a search of @RealPars videos for 'starter'. They have some quite good material, including a whole playlist on programming and wiring a star-delta starter.
@ashkanmahouti858 Жыл бұрын
I’m convinced I just need to be told how things work the caveman style. I have papers on papers explaining how a contractor works. Learned nothing about how it works but the part names. Watched this video for 10 seconds and I already figured it out
@realpars Жыл бұрын
That's an amazing compliment, Ashkan! Thanks a lot for sharing, we are happy to hear that!
@Logicmart5754 2 жыл бұрын
Hats off to you RealPars. What a nice way of explanation!
@realpars 2 жыл бұрын
Thanks a ton!
@cep5618 3 жыл бұрын
Excelent clear information. Congrat!
@realpars 3 жыл бұрын
Glad you enjoyed it!
@joefanningartist Жыл бұрын
Brilliant, very clearly explained, and very good visuals, thank you sir
@realpars Жыл бұрын
Glad it was helpful!
@electricaltalent7385 2 жыл бұрын
Very well explained I saw it many times easily understood thank you so much for this information..
@realpars 2 жыл бұрын
Glad to hear that! Thanks for your support
@logeshjeeva1231 3 жыл бұрын
Your videos are very useful to learn and I would say that I like the way of teaching through the awe animated videos..Thanks.
@realpars 3 жыл бұрын
Happy to hear that!
@cheoksc2231 2 жыл бұрын
Really good video explaining things clearly and easy to understand. Many thanks.
@realpars 2 жыл бұрын
Glad it was helpful!
@perrmyint3098 2 жыл бұрын
Clear and great video thank you for sharing your experience.
@murzanovv 3 жыл бұрын
Perfect explanation
@realpars 3 жыл бұрын
Glad you liked it
@simozy4475 11 ай бұрын
Thank you for the great and simple explanation
@realpars 11 ай бұрын
You're very welcome! Happy learning
@garokejelian565 2 жыл бұрын
You have a very good way to describe
@realpars 2 жыл бұрын
Thank you, Garo!
@maruthiprasad8184 3 жыл бұрын
Thank you very much for valuable information. Kindly make a video on Different PLC programming languages available and their applications and their best uses. Thank you very much for taking the feedback and making the same.
@realpars 3 жыл бұрын
Hi Maruthi! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!
@mixme8655 3 жыл бұрын
Wow that's why i like all your videos
@cletusasiwoko2368 Жыл бұрын
Hello Real Pars, I enjoy watching your videos. Undoubtedly, I have learnt a lot through them. I have a request. Can you please make a video on phase monitoring relay? I'm having a challenge understanding it. Thank you
@realpars Жыл бұрын
Great suggestion, Cletus! I will happily pass this on to our course developers. Thanks for sharing and happy learning!
@anilkumar-yf9gb Жыл бұрын
very nice explanation. can you explain in detail about operation(working) of vacuum circuit breakers
@realpars Жыл бұрын
Thanks for your comment! I will happily go ahead and pass this on to our course developers as a topic suggestion. Happy learning!
@Sunilthorat13 3 жыл бұрын
My fav KZfaq channel. ❤️
@annahabanna 3 жыл бұрын
Fantastic intro to the topic! Thank you.
@realpars 3 жыл бұрын
Glad you liked it!
@hamidaittaleb825 2 жыл бұрын
Wonderful explanation. Thank you so much 👍
@realpars 2 жыл бұрын
Glad it was helpful!
@sajadgul Жыл бұрын
Great explanation. Hat's off..
@realpars Жыл бұрын
Glad you liked it!
@abdullahmustafawi3165 10 ай бұрын
It was so helpful, thanks a lot!
@realpars 10 ай бұрын
Glad to hear that! Thank you for sharing
@udithabandara6382 7 ай бұрын
thank you, well explained
@realpars 7 ай бұрын
Glad you liked it! Thank you for sharing
@kuppilikiran654 2 жыл бұрын
Simply superb sir 🙏🙏
@realpars 2 жыл бұрын
Thank you, Kuppili!
@ibimpepple Жыл бұрын
Finally my question has been answered This is the best ❤
@realpars Жыл бұрын
Glad to hear that, Ibim! Happy learning
@sanelekabinde625 Жыл бұрын
Best video ever. Keep up the good work
@realpars Жыл бұрын
Thank you, Sanele!
@siddhant14999 Жыл бұрын
❤ beautiful explanation
@realpars Жыл бұрын
Thank you!
@jelynmahinay Жыл бұрын
very well explain. thank you sir.
@realpars Жыл бұрын
Glad you liked it!
@Ahmed_Alhadi2022 3 жыл бұрын
Well done good job , thank you
@realpars 3 жыл бұрын
Our pleasure!
@ac4cars656 Жыл бұрын
Yes, video has been very helpful!
@realpars Жыл бұрын
Glad it was helpful!
@255205titel 3 жыл бұрын
Nice introduction with the connection content of PLC, like it!
@realpars 3 жыл бұрын
Glad you liked it!
@alayshah6394 2 жыл бұрын
Great Explanation 👍
@realpars 2 жыл бұрын
Glad it was helpful!
@amadorcastro8497 2 жыл бұрын
Thank you soo much you help me a lot
@realpars 2 жыл бұрын
We're so glad!
@rajanbhatt5633 3 жыл бұрын
1. As u connect PLC to contractor coil as 24 v DC power supply is that from input or output modules? 2. And feedback is also from where in PLC input or output modules? 🙄
@ashutoshsawant7013 3 жыл бұрын
Since we are giving DC/AC power to contactor coil from PLC, it is given from output module and we are taking feedback to PLC from contactor coil, it is given to input module of a PLC.
@danielteyehuago1633 Жыл бұрын
Please the the contactor coil (A1 & A2) accept only DV input, because of the tutorials I have seen used AC supply
@nsjx 3 жыл бұрын
really Appreciate the Basics 👋
@realpars 3 жыл бұрын
Glad you like them!
@SanaataniArvindam 3 жыл бұрын
Clearly understood sir thank you
@realpars 3 жыл бұрын
Glad to hear that!
@royfamily865 2 жыл бұрын
Thank you very much, i like this video
@gyanamahendrasatapathy530 3 жыл бұрын
Great explanation about contactor
@realpars 3 жыл бұрын
Glad you liked it!
@SrOsvaldo1 3 жыл бұрын
Thank You Real Pars
@realpars 3 жыл бұрын
You're very welcome!
@deepensharma7977 Жыл бұрын
Such a helpful video.
@realpars Жыл бұрын
Glad to hear that!
@Framwerks 10 ай бұрын
Thanks very helpful 😊
@realpars 10 ай бұрын
Glad it was helpful! You're very welcome
@palaash4 2 жыл бұрын
Thank you
@GurinderSingh-cy6ox Жыл бұрын
The best video ever
@realpars Жыл бұрын
Thank you very much, Gurinder!
@dirasalsabila02 2 жыл бұрын
OMG thank you so much, this video is very helpful!!!
@realpars 2 жыл бұрын
You're so welcome!
@gilbertocastrosustaita6307 2 жыл бұрын
Amazing explanation!!!!very nice channel
@realpars 2 жыл бұрын
Thank you so much, Gilberto!
@ghosthunter9897 3 жыл бұрын
Thank you for a wonderful educational material for free. Can you please also make videos on motion control in Tia Portal?
@realpars 3 жыл бұрын
Hi Suman! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!
@emmanuelflores1781 2 жыл бұрын
Awesome video, great explained!
@realpars 2 жыл бұрын
Glad you liked it!
@lovesophia19 3 жыл бұрын
I love this channel.
@realpars 3 жыл бұрын
Glad to hear that, Lola!
@MiRac_Oje 3 ай бұрын
Very helpful 💯💯
@realpars 3 ай бұрын
Glad to hear that, happy learning!
@zubairyamin6044 3 жыл бұрын
this is an amazing and awesome video. keep it up sir. thanks for teaching us💖💓
@realpars 3 жыл бұрын
Thanks for your kind support, Zubair!
@xuanminhtran8547 3 жыл бұрын
I realy love your videos, they are very helpful.
@realpars 3 жыл бұрын
Thanks a lot, Xuan!
@travelthesoul Жыл бұрын
Best video ever
@realpars Жыл бұрын
Thank you so much!
@SOKHA847 Жыл бұрын
Thank for your video❤
@realpars Жыл бұрын
You're very welcome!
@marcorodriguez6811 2 жыл бұрын
beatiful and helpful... you have a new suscriber
@realpars 2 жыл бұрын
Awesome, thank you!
@ihab6292 3 жыл бұрын
👍 so nice and easy. Thank you for good work.
@realpars 3 жыл бұрын
You're more than welcome, Ihab!
@-lijbarye1754 2 жыл бұрын
after I found this channel I become real electrical engineer.
@realpars 2 жыл бұрын
Glad to hear that!
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