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: 25.06.2025 16:08
Barnstars:
For this case there are devices called Metal oxide varistors (MOV).
One
Why did lobsters evolve bright colors if they are neither poisonous nor venomous?
The bolt then partially travels down the line to your home.
So, the voltage could go up to 500 volts, and the fuse will not open up.
but I think this circuit , shows a few more pieces.
China's electric cars are cheaper, but is there a deeper cost? - BBC
These are simplified answers to the original question, and does not change anything I wrote above.
He then describes Rainy Season and Lightning.
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
David Beckham scores a winner with the royal circle - BBC
Can the fuse protect the electronic devices from lightning instead of a surge protector.
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
In schematic diagrams this is the symbol for a fuse:
Xbox-branded Meta Quest 3S leaks ahead of official reveal - TrueAchievements
He then describes the function of a fuse.
“ 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.
What is a good habit and what is bad one?
but this device (an Inductor) … impedes the rapid changes in the current.
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.
It seems Mohan does not understand the difference between a comment and an Answer.
17 more Rite Aid stores to close in WA, including 4 Bartell Drugs - The Seattle Times
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
2024–10–16 [ OO OLAOYE OYEBODE ]
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
Making a Diving Catch For Space - NASA Watch
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.
This is the picture of an electronic coil of wire wound around a core of magnetic material.
(Dc diagram shown, AC is similar).
Trump’s trade war is bruising Apple — and your 401(k) - CNN
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
An AC voltage/ current source, and an ac inductive load.
This one hit behind the barn.
If my lovely sister sleeps with my boyfriend, what should I do about her?
A fuse is a non-resetable over current circuit protector.
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
Ethane Exporter Says U.S. Won’t Allow Shipments to China - WSJ
But… the neutral is now “floating” because of the 1 ohm resistance.
The MOV will conduct when the voltage exceeds 50% of line voltage.
Now when you have a certain ac resistance, then a current flows in a loop.
what exactly is a ‘surge’ protector?
He then asserts :
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 problem then depends on "how fast does the fuse operate?".
First Sentence:
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.
When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.
There are three different concepts here that are getting confused.
There are two important concepts here.
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
This device then solves the entire problem.
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
eight
nine
What does a fuse do?
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
This is 'the assistant's answer'
What is lightning?
This is where the MOV conducts again, and dissipated the energy.
It also is a device that limits the change in current flow.
so, what happens?
A circuit breaker is similar, but is resettable.
At least they know the answer if they wanted it.
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
[image of Common-mode choke]
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 other is “what does a “fuse” do?”
2024–10–10[John johnson John Johnson ]
Edit 2024–10.
It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
a photo is worth a thousand words.
Upvotes:
But it can get overloaded, and no longer works.
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.
One is “what exactly is in a ‘surge protector’ ? ”
Here is a simplified AC power diagram.
Because the load is inductive, the current lags the voltage.(by a bit).
So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
At one ohm, the resistor has a maximum of 1 watt power.
I post the exact comment here.
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 a photo where a lightning bolt took out a home's complete mains distribution box, and a lot of electronic gear as well.
2024–10–14 [Omar Gharbi Omar Gharbi ]
This is where this question deviates from being a 'generic' question, and becomes more specific.
The third is lightning and “how it gets conducted into a home.”
[old diagram got deleted by accident]
So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.