A primer to Varistors

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A primer to Varistors

Рет қаралды 3,144

Sam Ben-Yaakov

Күн бұрын

Пікірлер: 33

@robson6285 3 жыл бұрын

Yes, lovely topic, such a component. especially with so many of the ins and outs so usefull explained. I really love these deeper-digging-in-a-component videolessons!

@sambenyaakov 3 жыл бұрын

As usual, you are an early bird😊

@justinn771 3 жыл бұрын

Wow thanks a lot Prof. Sam. Thumbs up!!! I was looking forward to it. You are a man of your word. Thanks again sir.

@sambenyaakov 3 жыл бұрын

👍

@zlatko2709 3 жыл бұрын

Amazing videos! Thank You for great content!

@sambenyaakov 3 жыл бұрын

Thanks.

@eduardinification 3 жыл бұрын

Thanks for the extremely interesting video on the topic.

@sambenyaakov 3 жыл бұрын

Thanks for kind note.

@tamaseduard5145 3 жыл бұрын

🙏🙏🙏❤️🙏🙏🙏

@sambenyaakov 3 жыл бұрын

Thanks

@mrtechie6810 Жыл бұрын

For 220-240VAC -- Should I use a 431 or 471 volt MOV? What would be the difference in leakage current at 240VAC?

@sambenyaakov Жыл бұрын

Not all MOVs are born equal. You neet to look at the datasheets.

@k7iq 3 жыл бұрын

We make SPDs (lightning arrestors) and use a few different voltages of 35mm MOVs. One of them turns on (1mA) at around 480V DC. These are TMOVs with the third leg. Yes, the internal connection is supposed to open (melt ?) when it gets too hot but we also add a thermal switch which was needed in order to pass the UL standard for these devices. Here is what can happen when the protection needs a wee bit more work... Current is "limited" to 10,000 amps by the test facility..... (they can do 1000VDC at 100K amps.) These SPDs work fine in 20,000+ amp lightning test simulations... kzfaq.info/get/bejne/r6mVYMhq1pvIZZs.html

@sambenyaakov 3 жыл бұрын

Wow that IS impressive, Thanks for sharing. If OK with you, I can print the link to your video at the comments section of my Varistor video. If fine with you, please write down a short description of what is shown.

@k7iq 3 жыл бұрын

@@sambenyaakov Yes Ben Will do

@sambenyaakov 3 жыл бұрын

👍

@k7iq 3 жыл бұрын

This is a link to our SPDs to start with... www.midnitesolar.com/products.php?menuItem=products&productCat_ID=23&productCatName=Surge%20Protection%20Devices The original SPDs were good for 115K amps but the newer ones are less because we do not use as many MOVs now and that is because we had to add the thermal limiting.... The SPD is offered in three different voltages to maximize the required protection level. Protection is achieved by reducing the clamping voltage to a safe level that your system can sustain without damaging any electronics in the system. The MNSPD is designed to clamp a 115,000 amp surge! Blue LED’s provide visual indication of operation from a distance. This video shows why we started making SPDs in our industry in the first place with a high current test done by World Products corporation that is another supplier of MOVs... kzfaq.info/get/bejne/rNGVebymrd6un4k.html

@k7iq 3 жыл бұрын

Another video that explains how these are used and installed

@marcbaflast7271 Жыл бұрын

La difficulté pour moi comme bcp d'autres personnes comme moi, nous ne pouvons pas suivre les tutos parce que nous ne comprenons pas tout simplement la langue. Le point de vue est difficile à exprimer. 😮

@sambenyaakov Жыл бұрын

J'ai du mal à comprendre ce que vous écrivez car je ne parle pas français 😊

@jayeshbalpande3894 3 жыл бұрын

Respected Sir, I very much love ur power electronics and electronics lecture..but i am not able to study in continuos manner...b'se of playlist unavailability..plz suggest me to approach.

@sambenyaakov 3 жыл бұрын

At the search window of KZfaq type "sam ben-yaakov" and a key word (e.g. control)