What exactly is the difference between a surge protector and a fuse? Can a fuse protect the electronic devices from lightning instead of surge protector?

In schematic diagrams this is the symbol for a fuse:

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So, the voltage could go up to 500 volts, and the fuse will not open up.

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2024–10–14 [Omar Gharbi Omar Gharbi ]

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At least they know the answer if they wanted it.

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This one hit behind the barn.

the problem then depends on "how fast does the fuse operate?".

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Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".

Edit 2024–10.

Can the fuse protect the electronic devices from lightning instead of a surge protector.

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a photo is worth a thousand words.

One is “what exactly is in a ‘surge protector’ ? ”

A fuse is a non-resetable over current circuit protector.

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The third is lightning and “how it gets conducted into a home.”

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There is no harm in having the surge suppressor along with the fuse in the circuit. The fuse will not open up until the current melts the link. This will take time, and in the interim, that jolt will get transmitted into the power supplies.

So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.

This is where this question deviates from being a 'generic' question, and becomes more specific.

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2024–10–11 [Victor Olarewsju Victor Olarewaju ]

2024–10–10[John johnson John Johnson ]

Lightning arrestor is a spark-gap device, and can be installed anywhere. What is important, is that the wire is thick enough to withstand the lightning bolt and conduct the energy away from the building.

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(Dc diagram shown, AC is similar).

There are two important concepts here.

For this case there are devices called Metal oxide varistors (MOV).

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This is an electronic circuit designed to clamp voltages so that the Voltage Potential that appears at the outlet is never going to exceed the nominal value.

And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.

There are three different concepts here that are getting confused.

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[old diagram got deleted by accident]

“ A surge suppressor is the one which is connected at the input supply so that when there is a sudden change voltage it bypasses thereby protecting the (circuit) and electronic components”

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But… the neutral is now “floating” because of the 1 ohm resistance.

2024–10–00 [ Ammar Mahdi ] Ammar Mahdi

but this device (an Inductor) … impedes the rapid changes in the current.

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2024–10–16 [ OO OLAOYE OYEBODE ]

At one ohm, the resistor has a maximum of 1 watt power.

These devices are installed between the “hot” and “neutral” and protective ground.

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What does a fuse do?

An AC voltage/ current source, and an ac inductive load.

Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.

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He then describes the function of a fuse.

The bolt then partially travels down the line to your home.

If the nominal power is 4,000 watts then the current at 230volts is 16 amps.

Hi everybody! I have been looking at posts on narcs and narc abuse on here and if has really helped me out a lot. I am currently struggling with my situation and need some advice/support. I met a narc last year, everything seemed to good to be true. Love bombing, always texting calling and taking me on dates. Everything changed when someone warned me about him out in public in front of him and who he is. This caused a conflict with us and the love bombing seized. he would tell me that everything is okay and i can come and talk. He would set a time limit on me and kick me out after that. he would then text me like everything was fine and we hung out again and after that he completely ghosted me for one week. He came back and texted me a week later laughing about the ghosting and acting like nothing had happened. he continued to text me ( not like in the beginning) make plans with me, then on the day of the plans he would just ghost me. One day he would act interested the next silence. i contacted him a month later and he acted like nothing happened. He was on a vacation and sent me a picture of another woman ( someone he allegedly met on the trip) to strike a reaction but i never gave him one. After the trip he came to my place and was extremely rude, accusing me of going on dates with a bunch of men. The next day he accused me of being an alcoholic and that he wanted nothing to do with me but said well maybe we can be "friends" then ghosted me i assumed at this point it was over and i would never hear from him again. He contacted me on the holiday a month later acting like everything was great. We ended up hanging out a month or so later and when we hung out it went well, i thought things were going in the right direction. after we hung out.. silence. I would try to text him and if he replied it would be very short then he just stopped replying. He ghosted me for almost three months. I thought he was done this time and of course he popped up again like nothing happened. At this point i was getting sick of if so i questioned him as to why he dissapeared and always does this. Of course he had some sob story about a injury and family member dying of cancer. I felt pity for him and he gave me an apology.. so i took him back stupidly. things seemed to be going smooth for a couple months, of course until his family member died and his injury got better he never contacted me and was distant. Menawhile, i was there for him during the difficult time for him. He lied to me about the funeral and never wanted to chat. I was chasing him and he would always claim nothing was wrong but when i said i thought he used me when he was down he could not handle it and would always tell me he didnt care and to go away. I would get so upset i would try texting him to work it out he would barelt respond and if he did he would not be nice about it. we did hang out a couple times after that, he would ignore me after. One day i was like hey i think you are seeing someone else, and i was like well ixam seeing someone so no problem if you are he said " buy bye good luck with your new guy stop contacting me" i was devastated and tried to get into contact with him for weeks then i just gave up and accepted it was over. He ended up contacting me a month later acting like everything was fine. He wanted to go out and have drinks i told him i would. He and i both seemed to have a great time. He ends up ignoring me again. I kept texting him trying to figure out what was wrong. He kept saying everything was fine and i said ok can we hang out again? He said maybe i was like why? He just kept saying maybe … our last conversation we had… i said what is wrong ? He said nothing is wrong everything is fine. I asked him why he keeps saying maybe. He said " maybe but i dont want to see you right now" i said why? He saix " im just not feeling it, if i wanted to date i would" i said why did you contact me less then a week ago wanting to go out? He said i didnt.. even though he did. So i said should i just move on or what? He said whatever you want to do. So i said that he was really confusing me and asked him if he had anything more to say before i move on? My messages were turning green so i panicked he blocked me and reacted irrationally. I said " omg did you block me? My messages are not going through. Even texted him on my work phone asking what was up. And called him twice ( please dont judge me i know it is pathetic i never was this type of girl before him) so he replied and said " Ok I'll block you now" then immedietly blocked me. He has never blocked me before since I have met him he will just ghost. Is this ths final discard aka " grand finale? Did i just push him too far? this has upset me so much its hard to even function.

It seems Mohan does not understand the difference between a comment and an Answer.

2024–10–11 [Bobby Sanchez Bobby Sanchez ].

but I think this circuit , shows a few more pieces.

What is lightning?

So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.

OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.

This is the picture of an electronic coil of wire wound around a core of magnetic material.

Now when you have a certain ac resistance, then a current flows in a loop.

These are simplified answers to the original question, and does not change anything I wrote above.

what exactly is a ‘surge’ protector?

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He then asserts :

Here is a simplified AC power diagram.

It also is a device that limits the change in current flow.

This is a high voltage low current spike that comes down the line because of the power poles being struck, and the voltage suppressors activating on the primary side of the transformer.

This is a photo where a lightning bolt took out a home's complete mains distribution box, and a lot of electronic gear as well.

so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.

But it can get overloaded, and no longer works.

2024–09–27 [ Mohan Rajaratnam Mohan Rajaratnam ] . Thinks you can get free electricity from nothing : Mohan Rajaratnam's answer to Is it possible to generate free electricity at home using a magnet or other low-cost methods? If so, how does it work?

A circuit breaker is similar, but is resettable.

At the secondary, it is 1000 times less.)turns ratio). If it gets hit with a 100,000 volt bolt of lightning then the voltage arrestors conduct and clamp the voltage down to line voltage, ( but a small amount leaks down the line). This is the problem.

The MOV will conduct when the voltage exceeds 50% of line voltage.

Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.

When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.

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I post the exact comment here.

He then describes Rainy Season and Lightning.

P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.

(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).

But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).

Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.

First Sentence:

The other is “what does a “fuse” do?”

“ A fuse is a device which protects the (circuit) against overload and short circuit.”

Once the voltage goes over 0.0650 volts, then this fact can be used to amplify the difference, and turn the circuit breaker off , furthur down the line. Essentially that is what a RCD/GFCI does, it compares the incoming current, to the outgoing current, and if the difference between the two currents is over 5mA, then it trips the circuit breaker.

This device then solves the entire problem.

“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”

so, what happens?

This is where the MOV conducts again, and dissipated the energy.

Because the load is inductive, the current lags the voltage.(by a bit).