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?

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

He then asserts :

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

Measles vaccinations drop as CDC updates travel guidance - Yahoo

One

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

There are three different concepts here that are getting confused.

AMC Theaters to Run Even More Commercials Before Movies Play - Bloomberg.com

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

so, what happens?

a photo is worth a thousand words.

Bradford researchers solve mystery of disease and wool trade - BBC

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

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

He then describes Rainy Season and Lightning.

Is it okay or problematic to be both Black and gay in society in the 21st century?

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

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.

Here is a simplified AC power diagram.

"More problems than it was helping”: Behind the growing distrust of antidepressants - Salon.com

Edit 2024–10.

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

There are two important concepts here.

Why are Indians so influenced by the Western culture, when the Indian tradition has so much to give?

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

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

What does a fuse do?

Stock Market News, June 3, 2025: Nasdaq Moves Higher; OECD Cuts U.S. Growth Outlook - WSJ

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

In schematic diagrams this is the symbol for a fuse:

[image of Common-mode choke]

Police take back statement dismissing hate crime in gay actor’s killing - The Washington Post

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

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

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

Elden Ring Nightreign Patch Notes Include Promised Improvements For Solo Play - GameSpot

He then describes the function of a fuse.

eight

But it can get overloaded, and no longer works.

Nintendo Switch 2 Welcome Tour overview trailer - Nintendo Everything

“ 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 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.

Giant cable and satellite company closer to Chapter 11 bankruptcy - TheStreet

nine

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

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

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.

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

2024–10–00 [ Ammar Mahdi ] Ammar Mahdi

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

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.

2024–10–10[John johnson John Johnson ]

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?

This is 'the assistant's answer'

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

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

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

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

This one hit behind the barn.

2024–10–11 [Victor Olarewsju Victor Olarewaju ]

The other is “what does a “fuse” do?”

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.

[old diagram got deleted by accident]

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

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.

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

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

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

What is lightning?

Barnstars:

2024–10–14 [Omar Gharbi Omar Gharbi ]

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

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

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

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

(Dc diagram shown, AC is similar).

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

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

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.

At least they know the answer if they wanted it.

I post the exact comment here.

Upvotes:

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

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

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

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

2024–10–16 [ OO OLAOYE OYEBODE ]

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

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.

what exactly is a ‘surge’ protector?

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

This device then solves the entire problem.