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: 01.07.2025 07:36
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
There are three different concepts here that are getting confused.
Edit 2024–10.
4 ways the Desmond Bane trade could affect the Celtics - Boston.com
A circuit breaker is similar, but is resettable.
For this case there are devices called Metal oxide varistors (MOV).
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
Does CloudFlare protect blackhat sites from DDOS attacks?
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
but I think this circuit , shows a few more pieces.
I post the exact comment here.
Salary you need to live comfortably in Virginia in 2025, according to new study - 13newsnow.com
First Sentence:
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
This is the picture of an electronic coil of wire wound around a core of magnetic material.
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
One
Can the fuse protect the electronic devices from lightning instead of a surge protector.
What is your worst experience in life?
2024–10–10[John johnson John Johnson ]
Here is a simplified AC power diagram.
So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
CRISPR used to remove extra chromosomes in Down syndrome and restore cell function - Earth.com
but this device (an Inductor) … impedes the rapid changes in the current.
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 where the MOV conducts again, and dissipated the energy.
A Closer Look At Uranus’s Moons Reveals a Surprising Dark Side - Gizmodo
[old diagram got deleted by accident]
At one ohm, the resistor has a maximum of 1 watt power.
He then describes Rainy Season and Lightning.
This device then solves the entire problem.
So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
What does a fuse do?
nine
Now when you have a certain ac resistance, then a current flows in a loop.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
What are the most extreme examples of hypocrisy?
(Dc diagram shown, AC is similar).
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
eight
Upvotes:
In schematic diagrams this is the symbol for a fuse:
There are two important concepts here.
Norris fastest as Piastri hits the wall during FP3 in Canada - Formula 1
so, what happens?
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
These devices are installed between the “hot” and “neutral” and protective ground.
Which country has the best and strictest legal system in the world?
What is lightning?
A fuse is a non-resetable over current circuit protector.
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.
New study maps psychological pathway from childhood abuse to adolescent addiction - PsyPost
These are simplified answers to the original question, and does not change anything I wrote above.
Barnstars:
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
Exactly When Apple Will Launch iPhone 17 And iPhone 17 Pro - Forbes
An AC voltage/ current source, and an ac inductive load.
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
The MOV will conduct when the voltage exceeds 50% of line voltage.
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
[image of Common-mode choke]
Because the load is inductive, the current lags the voltage.(by a bit).
2024–10–16 [ OO OLAOYE OYEBODE ]
But it can get overloaded, and no longer works.
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
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 'the assistant's answer'
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
The third is lightning and “how it gets conducted into a home.”
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.
“ 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”
The bolt then partially travels down the line to your home.
It also is a device that limits the change in current flow.
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.
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’ ? ”
The other is “what does a “fuse” do?”
But… the neutral is now “floating” because of the 1 ohm resistance.
what exactly is a ‘surge’ protector?
2024–10–14 [Omar Gharbi Omar Gharbi ]
This one hit behind the barn.
He then describes the function of a fuse.
It seems Mohan does not understand the difference between a comment and an Answer.
At least they know the answer if they wanted it.
the problem then depends on "how fast does the fuse operate?".
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
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.
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
This is where this question deviates from being a 'generic' question, and becomes more specific.
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.
He then asserts :
a photo is worth a thousand words.
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.
So, the voltage could go up to 500 volts, and the fuse will not open up.