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?

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

Edit 2024–10.

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

Proposed NASA cuts to space science: “Staggering” - EarthSky

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

In schematic diagrams this is the symbol for a fuse:

The other is “what does a “fuse” do?”

Astronomers discover black hole ripping a star apart inside a galactic collision. 'It is a peculiar event' - Yahoo

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

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

[old diagram got deleted by accident]

Pediatric flu deaths surge in Michigan: 'These are children' - The Detroit News

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

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

Upvotes:

UMG Says They Should Be Removed From Sara Rivers Lawsuit Against Diddy - TMZ

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

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

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

Scientists say a tiny brown moth navigates 600 miles using stars — just like humans and birds - CNN

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

2024–10–00 [ Ammar Mahdi ] Ammar Mahdi

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

Ethane Exporter Says U.S. Won’t Allow Shipments to China - WSJ

This one hit behind the barn.

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

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

Is AI secretly replacing your job right now without you knowing it? What do you think? Do you agree?

One

But it can get overloaded, and no longer works.

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

Celebrity breast cancer announcements highlight rising rates in young women - NBC News

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

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

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

Unannounced And Petty: Southwest Fired Their Skycaps, Now Charges $3 To Check Bags At The Curb—After Saying They Wouldn’t - View from the Wing

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

eight

What does a fuse do?

Kuorans, what are some things unique to your country?

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

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

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.

Porsche Built A One-Off Street-Legal 963 Hypercar For 88-Year-Old Roger Penske - Jalopnik

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

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

what exactly is a ‘surge’ protector?

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

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.

A circuit breaker is similar, but is resettable.

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

There are two important concepts here.

nine

This device then solves the entire problem.

so, what happens?

He then describes the function of a fuse.

2024–10–11 [Victor Olarewsju Victor Olarewaju ]

I post the exact comment here.

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

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.

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

a photo is worth a thousand words.

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

First Sentence:

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

2024–10–14 [Omar Gharbi Omar Gharbi ]

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.

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

What is lightning?

“ 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”

(Dc diagram shown, AC is similar).

[image of Common-mode choke]

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

He then asserts :

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?

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

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.

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

At least they know the answer if they wanted it.

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

This is 'the assistant's answer'

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.

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 ]

Here is a simplified AC power diagram.

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

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.

There are three different concepts here that are getting confused.

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

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

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

2024–10–16 [ OO OLAOYE OYEBODE ]

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

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

Barnstars: