Thank you so much. Pro HVAC. Beginner in electronics, so that I can fix PCBs in my industry. Mainly mini split and inverter heat pumps. I’m so glad yours are in English too.
You have very precisely described the importance of MOV And fuses I wish you all the best and request you to please post more information on safety electronics items I recently got a gift operated on (24 volts AC power 20-40VA only) Please suggest MOV AND fusable Resistor 🙏
How long can the varistor sustain full current flow? Is it milliseconds or seconds? Can they be used to feed power to a device and prevent low voltage operation? For example I want to prevent my RPi from coming on if the voltage is less than 5 volts. Thank you.
Good information & suggestion but you didn't mentioned the value of MOV which we can use in plugs or in line to protect our Electrical Appliances....????
I have 2 makita chargers who do not charge/red-green light flashing. I measured 230+ volts over the varistors pins when plugged in. Can i assume the varistors are damaged? Regards
What if MOV burns out first before fuse ?? There was a power surge and my MOV in my power strip burnt before my fuse blowed , so whenever i put in a new fuse it will immediately blow . Also my phone charger stopped charging and after 10-20 mins it started charging again after the power surge , should i get a new adapter?
I have this situation: a SEW 1.1 kW motor with a 180 DC brake. The brake (and the motor) is supplied from a Siemens G115D frequency inverter. I need to protect the brake, using a Varistor. How do I calculate the size/type of the Varistor? And do I need to protect the Varistor itself from too high current?
there is a light switch in our house that interfere with our tv and makes it turn off and on for a second when this light switch is turned on or off , can i use a varistor on that light switch to get rid of this problem ?
Damn I've seen those in use in the plant at work at but had no idea why they were installed ,even when I asked the older maintenance guys they also had no idea what these do, thanks for video it was super informative.
Your explanation as far as the operation of an MOV is ok. But your explanation does not cover the practical side properly. All mov's come in various triggering voltage and current clamping ratings. To effectively use an mov for voltage surge and spike protection, a good quality fuse of the appropriate rating is the first requirement. The rating of this fuse is selected, based on the device it is powering. Once this fuse rating is selected, the mov clamping current rating is selected, to be at least 50% higher than the fuse current rating, so that it is capable of rupturing the fuse easily, without damaging itself. The voltage rating of the mov is selected depending on the maximum voltage that can be safely tolerated by the protected device. And finally, it is not recommended to install an mov inside a plug top, for physical safety reasons.
I have never seen anything other than a fuse in a standard three pins plug. Such standard plug is not design for adding a MOV with expose legs that can cause short circuit. Still such MOV connection does work as cheap improvised voltage surge protector to accelerate blowing of fuse as extra protection to electric appliances. This is especially essential in poor countries like India & Myanmar where power supply is very unstable. Also in region lacking of lightning strike protection that always burn entire building electronic devices during a thunder strike, such MOV can act as cheap improvised surge protector in extra protection. However its recommended to use standard surge protector install in circuit breaker board or wire extension for proper protection, which can be reset after get trigger to cut off power supply safely. Otherwise make sure the MOV is connected behind a fuse (not before) to prevent sustainable spike of current like short circuit during long voltage surge. If i remrmber correctly, in Three Phase power supply lines, when the bad grounding of a star connection is loose, the voltage between two lines (Live & Neutral) will swing from 220V to 440V burning all the electrical devices. I had such bad experience living in a backward country.
MOVs aren't single shot devices. Provided they are used within their specifications they should last indefinitely. Ideally it should be connected downstream of the fuse so it's protected by the fuse but that's not easy with the fuse carrier in a BS 1363 plug top.
I have never seen one inside a 🇬🇧 plug and there isn’t room for one = we have the cartridge fuse in the plug for protecting the wire from the plug to the appliance, I tend to find the MOV inside the appliance itself
Its not a click bet some of the companies provided this to protect the electrical devices not in all but only in few. But the concept of the video is to tell you how a MOV Can protect your electrical Devices
@@sufianwarsi3000Sound is perfect on my mobile device. The problem seems to be with your device. Firstly it is not within the other poster's capability to resolve the issue. I don't know why you think it would be. Secondly, by his telling you that the sound is perfect for him, is not him being rude. He is giving you information to help you diagnose the problem. That is a good thing.
Very good information to protect our Electrical Appliances from high voltage.
you're a very good teacher
Very informative, thanks :)
Very good explanation. Thank you.
Thank you so much. Pro HVAC. Beginner in electronics, so that I can fix PCBs in my industry. Mainly mini split and inverter heat pumps. I’m so glad yours are in English too.
Very good authentic explanation. Thank u.❤❤
Thank you, for a very well explained video about mov protection.
Very good explanation in short words.👍
It’s safe to install mov especially for high wattage appliances. The query is how to determine what value of mov has to install. Please guide.
Thank you so much. Can you make a video playlists about invertor?
You have very precisely described the importance of MOV And fuses I wish you all the best and request you to please post more information on safety electronics items
I recently got a gift operated on (24 volts AC power 20-40VA only)
Please suggest MOV AND fusable Resistor 🙏
How long can the varistor sustain full current flow? Is it milliseconds or seconds? Can they be used to feed power to a device and prevent low voltage operation? For example I want to prevent my RPi from coming on if the voltage is less than 5 volts. Thank you.
Good information & suggestion but you didn't mentioned the value of MOV which we can use in plugs or in line to protect our Electrical Appliances....????
Nice teaching, Engineer pls what is the capacity of the varistor, that is the power rating and resistance? Do we have varistor on DC circuits ?
Could u please tell what is the value of varister to use in the electric current plug
Nice video explaining the concept
Very well said. Thank you. Very good explanation. This is what I am waiting for.
Excellent basics👍
Excellent tuition. Many thanks.
Thank you for the information.
What is the part number for VDR that we can use for 230v AC?
Thanks.
How is the "Varistor voltage" determined for use in any circuit or to provide power protection just by looking at the varistor itself?
For 230 AC supply . what is a suitable value available 14D _ _ 1 K
Nice explanation. Can you specify some MOV numbers for 230v AC circuits. ?
Does this component help a GFCI to work correctly? Thanks for your video.
I have 2 makita chargers who do not charge/red-green light flashing. I measured 230+ volts over the varistors pins when plugged in. Can i assume the varistors are damaged? Regards
what if we connect caps instead of varister?
will the flyback charge the caps?
we can use the charge in the caps for other work
Thanks for the details.
What if MOV burns out first before fuse ??
There was a power surge and my MOV in my power strip burnt before my fuse blowed , so whenever i put in a new fuse it will immediately blow .
Also my phone charger stopped charging and after 10-20 mins it started charging again after the power surge , should i get a new adapter?
I have this situation: a SEW 1.1 kW motor with a 180 DC brake. The brake (and the motor) is supplied from a Siemens G115D frequency inverter. I need to protect the brake, using a Varistor. How do I calculate the size/type of the Varistor? And do I need to protect the Varistor itself from too high current?
Thank you!
Good video, what are the vdr values available in the market
These devices are normally fitted on the pcb, not in a 13A plug.
Thanks
Is very understandable
Plz share a clear image of circuit (plug), and how to choose that MOV
Thanks for elaborate explanation.
Can you suggest what number MOV should I use for my TV and other electronic device pluy on extension box . I am Mumbai
How can you use a vdr in 3phase power supply. A multiplier or a shunt?
So this means with a varistor no need to have a fridgeguard?
there is a light switch in our house that interfere with our tv and makes it turn off and on for a second when this light switch is turned on or off , can i use a varistor on that light switch to get rid of this problem ?
How to select mov domestic appliance purpose please explain sir
Damn I've seen those in use in the plant at work at but had no idea why they were installed ,even when I asked the older maintenance guys they also had no idea what these do, thanks for video it was super informative.
Same here Man!! Thanks So much Sir!
Thank you ❤
Thank you
Hi, can anyone tell me the difference between varistor 14S471K and 14D471K if there is any?
Regards
Refer to the manufacturer's data sheet - Simples 😁
Refer to the manufacturer's data-sheet - Simples😁
Your explanation as far as the operation of an MOV is ok. But your explanation does not cover the practical side properly. All mov's come in various triggering voltage and current clamping ratings. To effectively use an mov for voltage surge and spike protection, a good quality fuse of the appropriate rating is the first requirement. The rating of this fuse is selected, based on the device it is powering. Once this fuse rating is selected, the mov clamping current rating is selected, to be at least 50% higher than the fuse current rating, so that it is capable of rupturing the fuse easily, without damaging itself. The voltage rating of the mov is selected depending on the maximum voltage that can be safely tolerated by the protected device. And finally, it is not recommended to install an mov inside a plug top, for physical safety reasons.
Thank you for adding the information and it is relevant to the topic. 👍
MOV should attached on far side of fuse; they occasionally fail short !!
so I will just put this in the plug of my DIY power extension cord in parallel to the AC source?
Thanks a lot 🙏
Much support from 🇿🇦 ZAR- Durban Rich Future by DSK Clothing ❤
At 7:25 If the MOV is burnt will it be shorted or open?
It will depend on the source energy level available and whether it's downstream of a suitable fuse.
I have never seen anything other than a fuse in a standard three pins plug. Such standard plug is not design for adding a MOV with expose legs that can cause short circuit.
Still such MOV connection does work as cheap improvised voltage surge protector to accelerate blowing of fuse as extra protection to electric appliances.
This is especially essential in poor countries like India & Myanmar where power supply is very unstable.
Also in region lacking of lightning strike protection that always burn entire building electronic devices during a thunder strike, such MOV can act as cheap improvised surge protector in extra protection.
However its recommended to use standard surge protector install in circuit breaker board or wire extension for proper protection, which can be reset after get trigger to cut off power supply safely.
Otherwise make sure the MOV is connected behind a fuse (not before) to prevent sustainable spike of current like short circuit during long voltage surge.
If i remrmber correctly, in Three Phase power supply lines, when the bad grounding of a star connection is loose, the voltage between two lines (Live & Neutral) will swing from 220V to 440V burning all the electrical devices. I had such bad experience living in a backward country.
MOV'S are usable for only a single surge. Therefore, not sure if using it across a switch is a viable idea...
MOVs aren't single shot devices. Provided they are used within their specifications they should last indefinitely. Ideally it should be connected downstream of the fuse so it's protected by the fuse but that's not easy with the fuse carrier in a BS 1363 plug top.
I have never seen one inside a 🇬🇧 plug and there isn’t room for one = we have the cartridge fuse in the plug for protecting the wire from the plug to the appliance, I tend to find the MOV inside the appliance itself
Its not a click bet some of the companies provided this to protect the electrical devices not in all but only in few.
But the concept of the video is to tell you how a MOV Can protect your electrical Devices
@@TheElectricalGuyI too have never seen this in any plug, and I agree there is not enough room to put it in
Good explanation. Thanks for making the video.
Default sound level too low.
I use hearing aid
Nobody understands the concept, he just reads whatever is there in a book!!😂!!
Wrong explanation - resistance does not decrease linear with applied voltage.
Kindly increase the volume level of this video, Bcoz Ur voice is so low to understand.
You need to check your phone or computer because his volume is perfect.
Very Bad to argue than resolve the issue.
His sound has owez been 💯 perfect. Just check ur 🔊 output settings well
@@sufianwarsi3000Sound is perfect on my mobile device.
The problem seems to be with your device.
Firstly it is not within the other poster's capability to resolve the issue. I don't know why you think it would be.
Secondly, by his telling you that the sound is perfect for him, is not him being rude. He is giving you information to help you diagnose the problem. That is a good thing.
Your ridiculous use of the cursor makes the video unwatchable for me.
OCD issues for you?
If You want to teach, then You need to slow down and speak at a slower pace!
No problem understanding the OP!! His Teaching is fine, your listening needs adjusting Please!
Speed is fine.