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: 24.06.2025 05:46
I post the exact comment here.
This is where this question deviates from being a 'generic' question, and becomes more specific.
First Sentence:
Inside the Spectacular Downfall of UnitedHealth and Its CEO - WSJ
“ 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”
This is the picture of an electronic coil of wire wound around a core of magnetic material.
What is lightning?
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
Edit 2024–10.
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
Orioles Designate Emmanuel Rivera For Assignment, Option Heston Kjerstad - MLB Trade Rumors
One
At one ohm, the resistor has a maximum of 1 watt power.
At least they know the answer if they wanted it.
How was your JEE Advanced 2024 result?
There are two important concepts here.
He then asserts :
An AC voltage/ current source, and an ac inductive load.
Rare ‘Einstein zig-zag’ sheds light on universe’s hidden forces - The Brighter Side of News
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
2024–10–10[John johnson John Johnson ]
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
Can the fuse protect the electronic devices from lightning instead of a surge protector.
Shiba Inu risks 18% drop, but whales keep buying – What do they know? - AMBCrypto
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
He then describes Rainy Season and Lightning.
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?
How does red light therapy affect eyes?
The MOV will conduct when the voltage exceeds 50% of line voltage.
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
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.
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 bolt then partially travels down the line to your home.
eight
So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
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.
but this device (an Inductor) … impedes the rapid changes in the current.
Apple’s Craig Federighi on the long road to the iPad’s Mac-like multitasking - Ars Technica
These devices are installed between the “hot” and “neutral” and protective ground.
A fuse is a non-resetable over current circuit protector.
So, the voltage could go up to 500 volts, and the fuse will not open up.
Can you share some of your favorite jokes that are not well-known but always make people laugh?
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
This one hit behind the barn.
what exactly is a ‘surge’ protector?
Does centrifugal force teach us about gravity?
but I think this circuit , shows a few more pieces.
A circuit breaker is similar, but is resettable.
Upvotes:
Do guys prefer big boobs or small boobs? Why?
[old diagram got deleted by accident]
It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
the problem then depends on "how fast does the fuse operate?".
Because the load is inductive, the current lags the voltage.(by a bit).
For this case there are devices called Metal oxide varistors (MOV).
He then describes the function of a fuse.
What does a fuse do?
Barnstars:
But it can get overloaded, and no longer works.
It seems Mohan does not understand the difference between a comment and an Answer.
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.
nine
(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.
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
It also is a device that limits the change in current flow.
The other is “what does a “fuse” do?”
One is “what exactly is in a ‘surge protector’ ? ”
(Dc diagram shown, AC is similar).
a photo is worth a thousand words.
But… the neutral is now “floating” because of the 1 ohm resistance.
This is 'the assistant's answer'
There are three different concepts here that are getting confused.
Now when you have a certain ac resistance, then a current flows in a loop.
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.
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.
In schematic diagrams this is the symbol for a fuse:
2024–10–14 [Omar Gharbi Omar Gharbi ]
This device then solves the entire problem.
[image of Common-mode choke]
so, what happens?
The third is lightning and “how it gets conducted into a home.”
2024–10–16 [ OO OLAOYE OYEBODE ]
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
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.
These are simplified answers to the original question, and does not change anything I wrote above.
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
Here is a simplified AC power diagram.
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.