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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?

Last Updated: 20.06.2025 07:26

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?

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

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.

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

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

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.

California schools are very liberal. Do you think California schools are teaching students to hate Republican views (views on: God, guns, prayer, secure borders, etc.)?

There are three different concepts here that are getting confused.

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.

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

What’s the worst thing you caught anyone in your family doing?

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

He then describes the function of a fuse.

One

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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?".

This one hit behind the barn.

Here is a simplified AC power diagram.

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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.

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

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

Why are there posts saying the T in LGBT should be dropped? With what is happening in the US and beyond against the trans community cause for concern that if this is accepted could it be deemed acceptable to start on the LGB community again?

2024–10–11 [Victor Olarewsju Victor Olarewaju ]

“ 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”

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

What does it mean when someone leaves something in your house, your room to be exact, and when you tell them, they say they left it there on purpose?

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.

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

[old diagram got deleted by accident]

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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.

Edit 2024–10.

so, what happens?

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

2024–10–00 [ Ammar Mahdi ] Ammar Mahdi

He then asserts :

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First Sentence:

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

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What are your thoughts on Italian nationalist poet Gabriele D'Annunzio, who was the subject of the documentary "Fiume o morte!"?

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

[image of Common-mode choke]

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?

Have your parents ever walked in on you?

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

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

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

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

This device then solves the entire problem.

What is lightning?

Do you think trump realizes that if he significantly decreases the size of CIA, that there is a higher chance of him being assassinated?

He then describes Rainy Season and Lightning.

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

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

Barnstars:

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

But it can get overloaded, and no longer works.

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

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

2024–10–14 [Omar Gharbi Omar Gharbi ]

2024–10–10[John johnson John Johnson ]

(Dc diagram shown, AC is similar).

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

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

2024–10–16 [ OO OLAOYE OYEBODE ]

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

In schematic diagrams this is the symbol for a fuse:

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

What does a fuse do?

what exactly is a ‘surge’ protector?

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

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

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

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

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

Upvotes:

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

nine

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

The other is “what does a “fuse” do?”

At least they know the answer if they wanted it.

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

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

There are two important concepts here.

a photo is worth a thousand words.

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

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

A circuit breaker is similar, but is resettable.

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

I post the exact comment here.

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

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

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.

This is 'the assistant's answer'