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: 18.06.2025 12:50
There are two important concepts here.
This is where this question deviates from being a 'generic' question, and becomes more specific.
The bolt then partially travels down the line to your home.
so, what happens?
Because the load is inductive, the current lags the voltage.(by a bit).
He then asserts :
This Week In Space podcast: Episode 165 — Guardians of Space - Space
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
but I think this circuit , shows a few more pieces.
The third is lightning and “how it gets conducted into a home.”
The other is “what does a “fuse” do?”
The Louvre, the world’s most-visited museum, shuts down to sound the alarm on mass tourism - PBS
In schematic diagrams this is the symbol for a fuse:
I post the exact comment here.
An AC voltage/ current source, and an ac inductive load.
Upvotes:
Barnstars:
But… the neutral is now “floating” because of the 1 ohm resistance.
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
At least they know the answer if they wanted it.
2024–10–14 [Omar Gharbi Omar Gharbi ]
So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
It seems Mohan does not understand the difference between a comment and an Answer.
What's your take on Eternal Sunshine of the Spotless Mind? How has it affected you?
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 ]
New Pluto-Like Planet Discovered In Solar System — What To Know - Forbes
There are three different concepts here that are getting confused.
What is lightning?
The MOV will conduct when the voltage exceeds 50% of line voltage.
Why would Hugh Grant cheat on Elizabeth Hurley?
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
So, the voltage could go up to 500 volts, and the fuse will not open up.
Scientists Discover Anti-Aging Molecules Hiding in Your Blood - SciTechDaily
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
nine
He then describes the function of a fuse.
Astronomers discover the largest 'ultramassive' black hole ever seen - Earth.com
eight
[old diagram got deleted by accident]
These are simplified answers to the original question, and does not change anything I wrote above.
How many boxes 600 x 400 x 200 go into a 20ft container?
a photo is worth a thousand words.
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.
2024–09–27 [ 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?
What does a fuse do?
But it can get overloaded, and no longer works.
Here is a simplified AC power diagram.
2024–10–16 [ OO OLAOYE OYEBODE ]
This device then solves the entire problem.
When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.
Now when you have a certain ac resistance, then a current flows in a loop.
Edit 2024–10.
the problem then depends on "how fast does the fuse operate?".
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’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
He then describes Rainy Season and Lightning.
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.
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.
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
This is where the MOV conducts again, and dissipated the energy.
A circuit breaker is similar, but is resettable.
A fuse is a non-resetable over current circuit protector.
One
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 exactly is a ‘surge’ protector?
This is the picture of an electronic coil of wire wound around a core of magnetic material.
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
but this device (an Inductor) … impedes the rapid changes in the current.
This is 'the assistant's answer'
This one hit behind the barn.
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
One is “what exactly is in a ‘surge protector’ ? ”
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
“ 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”
For this case there are devices called Metal oxide varistors (MOV).
First Sentence:
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
These devices are installed between the “hot” and “neutral” and protective ground.
At one ohm, the resistor has a maximum of 1 watt power.
Can the fuse protect the electronic devices from lightning instead of a surge protector.
(Dc diagram shown, AC is similar).
[image of Common-mode choke]
It also is a device that limits the change in current flow.