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?

The other is “what does a “fuse” do?”

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

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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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.

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

This is 'the assistant's answer'

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

Here is a simplified AC power diagram.

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

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(Dc diagram shown, AC is similar).

At least they know the answer if they wanted it.

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

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2024–10–00 [ Ammar Mahdi ] Ammar Mahdi

First Sentence:

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?

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Upvotes:

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

What is lightning?

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2024–10–11 [Victor Olarewsju Victor Olarewaju ]

This one hit behind the barn.

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

Is it possible that my TF caused a kundalini awakening in another person? He is famous because He is a singer. We have not met physically yet, but I have gone through kundalini awakening and DNOTS and their ongoing. I have also had soul recognition so I know for sure that He is my Divine Counterpart and I do not have any doubts about it. But it is indeed perplexing that somebody had an awakening at the physical level because of Him. Is it a test for me? I have a mixture of feelings. On one hand I marvelled at Him and empathised with the person and on the other, I doubt if this just a test for me. I would appreciate your pov. Thank you for much.

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

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

I post the exact comment here.

How often do you watch the news on TV?

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

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

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

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

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.

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

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

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But it can get overloaded, and no longer works.

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Edit 2024–10.

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

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

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

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

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

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

Barnstars:

a photo is worth a thousand words.

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[old diagram got deleted by accident]

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

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

If everyone in Russia dropped into holes in the ground only never to return, would that be good for NATO and international peacekeepers? Can we convince Russians to be less diabolical, so they coexist? Does Putin stink like doo doo in the commode?

He then asserts :

2024–10–10[John johnson John Johnson ]

One

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.

[image of Common-mode choke]

2024–10–16 [ OO OLAOYE OYEBODE ]

so, what happens?

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.

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.

what exactly is a ‘surge’ protector?

“ 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”

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

It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.

He then describes the function of a fuse.

A circuit breaker is similar, but is resettable.

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There are three different concepts here that are getting confused.

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

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

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

This device then solves the entire problem.

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

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

In schematic diagrams this is the symbol for a fuse:

There are two important concepts here.

What does a fuse do?

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

2024–10–14 [Omar Gharbi Omar Gharbi ]

He then describes Rainy Season and Lightning.

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

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

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

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

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

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

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

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

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

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

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.