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: 02.07.2025 01:31
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
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.
For this case there are devices called Metal oxide varistors (MOV).
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
What does a fuse do?
With Quantum Entanglement And Blockchain, We Can Finally Generate Real Random Numbers - IFLScience
Here is a simplified AC power diagram.
Upvotes:
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:
2024–10–10[John johnson John Johnson ]
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
A rocket scientist wrestles with backlash over her Blue Origin flight - The Washington Post
Because the load is inductive, the current lags the voltage.(by a bit).
First Sentence:
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
What Is Agentic AI? Everything to Know About Artificial Intelligence Agents - CNET
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
what exactly is a ‘surge’ protector?
Elizabeth Hurley Strips Naked for 60th Birthday, Gushes Over Being in Love - TMZ
“ 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”
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 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.
The bolt then partially travels down the line to your home.
This is where the MOV conducts again, and dissipated the energy.
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
Winners, losers from NASCAR Cup race at Pocono won by Chase Briscoe - NBC Sports
but I think this circuit , shows a few more pieces.
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
Now when you have a certain ac resistance, then a current flows in a loop.
New study finds strong link between hearing loss and dementia - WKRC
At one ohm, the resistor has a maximum of 1 watt power.
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
These are simplified answers to the original question, and does not change anything I wrote above.
Rafael Devers Made Worst Announcement For Red Sox Fans - Sports Illustrated
Barnstars:
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.
It also is a device that limits the change in current flow.
Acting NASA Administrator Janet Petro June 6, 2025 - NASA Watch
Can the fuse protect the electronic devices from lightning instead of a surge protector.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
What is lightning?
(Dc diagram shown, AC is similar).
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.
PSG vs. Inter Miami: What will decide Club World Cup knockout game? - MLSsoccer.com
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.
There are two important concepts here.
[old diagram got deleted by accident]
A circuit breaker is similar, but is resettable.
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.
This device then solves the entire problem.
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
An AC voltage/ current source, and an ac inductive load.
This one hit behind the barn.
But it can get overloaded, and no longer works.
He then asserts :
These devices are installed between the “hot” and “neutral” and protective ground.
The third is lightning and “how it gets conducted into a home.”
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
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.
nine
One is “what exactly is in a ‘surge protector’ ? ”
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
2024–10–14 [Omar Gharbi Omar Gharbi ]
But… the neutral is now “floating” because of the 1 ohm resistance.
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.
but this device (an Inductor) … impedes the rapid changes in the current.
At least they know the answer if they wanted it.
A fuse is a non-resetable over current circuit protector.
a photo is worth a thousand words.
One
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 picture of an electronic coil of wire wound around a core of magnetic material.
It seems Mohan does not understand the difference between a comment and an Answer.
so, what happens?
There are three different concepts here that are getting confused.
I post the exact comment here.
Edit 2024–10.
He then describes the function of a fuse.
This is where this question deviates from being a 'generic' question, and becomes more specific.
2024–10–16 [ OO OLAOYE OYEBODE ]
The other is “what does a “fuse” do?”
The MOV will conduct when the voltage exceeds 50% of line voltage.
the problem then depends on "how fast does the fuse operate?".
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
[image of Common-mode choke]
This is 'the assistant's answer'
eight