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?
08.06.2025 11:21

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?
It seems Mohan does not understand the difference between a comment and an Answer.
Ray Dalio: ‘We should be afraid of the bond market’ - CNN
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.
So, the voltage could go up to 500 volts, and the fuse will not open up.
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
Can the fuse protect the electronic devices from lightning instead of a surge protector.
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.
Israel launches several attacks on Beirut’s southern suburbs, south Lebanon - Al Jazeera
2024–10–16 [ OO OLAOYE OYEBODE ]
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
Now when you have a certain ac resistance, then a current flows in a loop.
An AC voltage/ current source, and an ac inductive load.
a photo is worth a thousand words.
First Sentence:
Have you been with a stranger yet?
Upvotes:
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
At one ohm, the resistor has a maximum of 1 watt power.
What would you do if you were lost at sea in the Florida Keys?
what exactly is a ‘surge’ protector?
I post the exact comment here.
There are two important concepts here.
What were some things that the ancient Greeks excelled at compared to the Romans?
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
Edit 2024–10.
What do you think about Matt Gatz as an attorney general?
This is 'the assistant's answer'
So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
One
Do older women know what they want?
In schematic diagrams this is the symbol for a fuse:
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
This one hit behind the barn.
Is it true that most Indian men are gay and they just hide their feelings?
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 device then solves the entire problem.
eight
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 ]
For this case there are devices called Metal oxide varistors (MOV).
What song are you listening to right now? What does it mean to you?
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.
It also is a device that limits the change in current flow.
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
Inside Ukraine’s audacious drone attack on Russian air bases - CNN
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
[image of Common-mode choke]
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
Senate to Review Trump ‘Revenge’ Tax Worrying Wall Street - Bloomberg
What is lightning?
At least they know the answer if they wanted it.
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
What are some common examples of human hypocrisy?
This is where the MOV conducts again, and dissipated the energy.
The MOV will conduct when the voltage exceeds 50% of line voltage.
But it can get overloaded, and no longer works.
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
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.
The other is “what does a “fuse” do?”
It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
A circuit breaker is similar, but is resettable.
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
A fuse is a non-resetable over current circuit protector.
The bolt then partially travels down the line to your home.
but I think this circuit , shows a few more pieces.
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 ]
the problem then depends on "how fast does the fuse operate?".
He then describes Rainy Season and Lightning.
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.
Because the load is inductive, the current lags the voltage.(by a bit).
“ 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 devices are installed between the “hot” and “neutral” and protective ground.
nine
One is “what exactly is in a ‘surge protector’ ? ”
There are three different concepts here that are getting confused.
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?
[old diagram got deleted by accident]
He then asserts :
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.
Here is a simplified AC power diagram.
(Dc diagram shown, AC is similar).
This is where this question deviates from being a 'generic' question, and becomes more specific.
but this device (an Inductor) … impedes the rapid changes in the current.
This is the picture of an electronic coil of wire wound around a core of magnetic material.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
Barnstars:
These are simplified answers to the original question, and does not change anything I wrote above.
But… the neutral is now “floating” because of the 1 ohm resistance.
So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
The third is lightning and “how it gets conducted into a home.”