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?
12.06.2025 00:01
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
Here is a simplified AC power diagram.
For this case there are devices called Metal oxide varistors (MOV).
Why do people love to live alone in a house?
A fuse is a non-resetable over current circuit protector.
2024–10–16 [ OO OLAOYE OYEBODE ]
This is where the MOV conducts again, and dissipated the energy.
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
[image of Common-mode choke]
The LAX/Metro Transit Center is opening today—here’s what you need to know - Time Out
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 voltage could go up to 500 volts, and the fuse will not open up.
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
People’s Pharmacy: Aspirin thinking has changed for cardiovascular risks - OregonLive.com
2024–10–14 [Omar Gharbi Omar Gharbi ]
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.
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.
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.
Because the load is inductive, the current lags the voltage.(by a bit).
Brain’s Reward Center Tracks Not Just What, But When Rewards Arrive - Neuroscience News
It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
At least they know the answer if they wanted it.
The other is “what does a “fuse” do?”
eight
I post the exact comment here.
but this device (an Inductor) … impedes the rapid changes in the current.
Popular sugar substitute erythritol may impair brain blood vessel health, study finds - PsyPost
This is where this question deviates from being a 'generic' question, and becomes more specific.
First Sentence:
This one hit behind the barn.
My blog is new. I need 10 article posts for my blog. How much should I pay for it?
An AC voltage/ current source, and an ac inductive load.
so, what happens?
what exactly is a ‘surge’ protector?
Edit 2024–10.
nine
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
Phase-resolved attoclock precisely measures electron tunneling time - Phys.org
It also is a device that limits the change in current flow.
In schematic diagrams this is the symbol for a fuse:
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
Circle IPO Is Said to Price Above Range to Raise $1.1 Billion - Bloomberg
This is 'the assistant's answer'
The MOV will conduct when the voltage exceeds 50% of line voltage.
a photo is worth a thousand words.
A Manson Family member was recommended for parole again. But she's not free just yet - NPR
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.
2024–10–10[John johnson John Johnson ]
It seems Mohan does not understand the difference between a comment and an Answer.
the problem then depends on "how fast does the fuse operate?".
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
[old diagram got deleted by accident]
Now when you have a certain ac resistance, then a current flows in a loop.
but I think this circuit , shows a few more pieces.
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
He then asserts :
At one ohm, the resistor has a maximum of 1 watt power.
He then describes the function of a fuse.
Upvotes:
“ 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”
When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
He then describes Rainy Season and Lightning.
One is “what exactly is in a ‘surge protector’ ? ”
What does a fuse do?
These devices are installed between the “hot” and “neutral” and protective ground.
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
There are two important concepts here.
But… the neutral is now “floating” because of the 1 ohm resistance.
There are three different concepts here that are getting confused.
One
The bolt then partially travels down the line to your home.
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
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 combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
These are simplified answers to the original question, and does not change anything I wrote above.
This is the picture of an electronic coil of wire wound around a core of magnetic material.
A circuit breaker is similar, but is resettable.
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
This device then solves the entire problem.
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.
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
Can the fuse protect the electronic devices from lightning instead of a surge protector.
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
Barnstars:
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
What is lightning?
But it can get overloaded, and no longer works.
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
(Dc diagram shown, AC is similar).
The third is lightning and “how it gets conducted into a home.”