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: 03.07.2025 03:39
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
nine
What is lightning?
Top 10 Cable TV Networks Most Likely to Shutdown As of June 2025 - | Cord Cutters News
There are three different concepts here that are getting confused.
It also is a device that limits the change in current flow.
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
What does a fuse do?
Can the fuse protect the electronic devices from lightning instead of a surge protector.
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
3 Subtle Signs Your Relationship Is Near Its End — By A Psychologist - Forbes
In schematic diagrams this is the symbol for a fuse:
One is “what exactly is in a ‘surge protector’ ? ”
An AC voltage/ current source, and an ac inductive load.
Davante Adams feels rejuvenated: Joining Rams was "exactly what I needed" - NBC Sports
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.
This one hit behind the barn.
One
Long-term study ties midlife vascular health to later dementia risk - Medical Xpress
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
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 where this question deviates from being a 'generic' question, and becomes more specific.
Steelers quickly settle any Aaron Rodgers jersey number mystery after signing - New York Post
Now when you have a certain ac resistance, then a current flows in a loop.
“ 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.
So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
but this device (an Inductor) … impedes the rapid changes in the current.
Poor appetite? What that can mean and how to get hungry again - The Washington Post
He then asserts :
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
This is 'the assistant's answer'
What are some sad truths about life?
what exactly is a ‘surge’ protector?
When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.
It seems Mohan does not understand the difference between a comment and an Answer.
Rory McIlroy destroys tee marker but survives cut at U.S. Open - NBC Sports
At one ohm, the resistor has a maximum of 1 watt power.
For this case there are devices called Metal oxide varistors (MOV).
These are simplified answers to the original question, and does not change anything I wrote above.
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
(Dc diagram shown, AC is similar).
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.
Could This Diet Be the Key to Preventing Alzheimer's and Dementia? - bestlifeonline.com
The other is “what does a “fuse” do?”
First Sentence:
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
At least they know the answer if they wanted it.
I post the exact comment here.
2024–10–16 [ OO OLAOYE OYEBODE ]
2024–10–10[John johnson John Johnson ]
so, what happens?
Because the load is inductive, the current lags the voltage.(by a bit).
So, the voltage could go up to 500 volts, and the fuse will not open up.
[old diagram got deleted by accident]
Edit 2024–10.
This is the picture of an electronic coil of wire wound around a core of magnetic material.
the problem then depends on "how fast does the fuse operate?".
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
But it can get overloaded, and no longer works.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
A circuit breaker is similar, but is resettable.
A fuse is a non-resetable over current circuit protector.
There are two important concepts here.
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
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.
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
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.
The MOV will conduct when the voltage exceeds 50% of line voltage.
So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
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.
But… the neutral is now “floating” because of the 1 ohm resistance.
a photo is worth a thousand words.
2024–10–14 [Omar Gharbi Omar Gharbi ]
These devices are installed between the “hot” and “neutral” and protective ground.
This device then solves the entire problem.
Here is a simplified AC power diagram.
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?
Barnstars:
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
He then describes the function of a fuse.
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.
but I think this circuit , shows a few more pieces.
Upvotes:
The third is lightning and “how it gets conducted into a home.”
[image of Common-mode choke]
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
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 where the MOV conducts again, and dissipated the energy.
eight