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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: 17.06.2025 01:07

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 bolt then partially travels down the line to your home.

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

The other is “what does a “fuse” do?”

Is love natural, or is it somehow created?

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

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

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

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

In schematic diagrams this is the symbol for a fuse:

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What are the most extreme examples of hypocrisy?

This one hit behind the barn.

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

(Dc diagram shown, AC is similar).

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

Edit 2024–10.

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

Is it very wrong to want to spend some time with husband after continuous work for 5 days in a weekend because my husband thinks if we go out every weekend what night my parents and other family members think?

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

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

This is 'the assistant's answer'

Why are people so rude to debt collector’s? I am one and I am so tired of being mistreated. We are under paid and then have to deal with the most ungrateful, and disrespectful people. We aren’t customer service. Don’t get mad at us because YOU owe.

Here is a simplified AC power diagram.

a photo is worth a thousand words.

There are three different concepts here that are getting confused.

I’m worried I have a bat bite on my hand, I have two small marks about 1 cm apart. I haven’t been in contact with a bat but I’m worried about at night. My fingers have a slight tingling sensation and my arm feels cold but isn’t. Am I ok?

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

2024–10–10[John johnson John Johnson ]

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

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

[old diagram got deleted by accident]

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

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At least they know the answer if they wanted it.

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

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

Why would a spouse cheat if the marriage is good?

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

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

2024–10–00 [ Ammar Mahdi ] Ammar Mahdi

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2024–10–14 [Omar Gharbi Omar Gharbi ]

Upvotes:

First Sentence:

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

He then describes Rainy Season and Lightning.

One

I post the exact comment here.

What does a fuse do?

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

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

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Barnstars:

There are two important concepts here.

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.

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

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

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

What is lightning?

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.

2024–10–16 [ OO OLAOYE OYEBODE ]

[image of Common-mode choke]

what exactly is a ‘surge’ protector?

He then asserts :

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

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?

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.

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

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.

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

“ 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”

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

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

This device then solves the entire problem.

But it can get overloaded, and no longer works.

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

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

2024–10–11 [Victor Olarewsju Victor Olarewaju ]

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

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.

A circuit breaker is similar, but is resettable.

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

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

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

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.

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.

He then describes the function of a fuse.

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

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

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

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

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

so, what happens?