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 01:56
2024–10–14 [Omar Gharbi Omar Gharbi ]
(Dc diagram shown, AC is similar).
For this case there are devices called Metal oxide varistors (MOV).
An AC voltage/ current source, and an ac inductive load.
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 is 'the assistant's answer'
Nintendo Switch 2 Welcome Tour overview trailer - Nintendo Everything
There are three different concepts here that are getting confused.
It seems Mohan does not understand the difference between a comment and an Answer.
So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.
New questions emerge from the new charges in Kilmar Abrego Garcia case - NBC News
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
A circuit breaker is similar, but is resettable.
McDonald’s bringing it’s own version of iconic dessert to its McFlurry menu - MLive.com
a photo is worth a thousand words.
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
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.
Why is my ex mad I moved on when he dumped me?
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
but I think this circuit , shows a few more pieces.
What kind of lights would you like to use for your home decor?
[old diagram got deleted by accident]
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
Here is a simplified AC power diagram.
Why have Indian girls almost stopped wearing sarees?
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
He then asserts :
So, the voltage could go up to 500 volts, and the fuse will not open up.
Can Japan hold on to its ‘indispensable’ companies? - Financial Times
This device then solves the entire problem.
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
what exactly is a ‘surge’ protector?
In schematic diagrams this is the symbol for a fuse:
Credit cards could blow up a carefully crafted crypto compromise - Politico
This one hit behind the barn.
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.
First Sentence:
A Japanese lander crashed on the Moon after losing track of its location - Ars Technica
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.
What does a fuse do?
2024–10–16 [ OO OLAOYE OYEBODE ]
The U.S. hasn’t seen a new confirmed human bird flu case in nearly 4 months — why? - Yahoo
These are simplified answers to the original question, and does not change anything I wrote above.
but this device (an Inductor) … impedes the rapid changes in the current.
I post the exact comment here.
eight
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
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.
Now when you have a certain ac resistance, then a current flows in a loop.
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.
Can the fuse protect the electronic devices from lightning instead of a surge protector.
But it can get overloaded, and no longer works.
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?
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
so, what happens?
He then describes the function of a fuse.
When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.
These devices are installed between the “hot” and “neutral” and protective ground.
Because the load is inductive, the current lags the voltage.(by a bit).
The bolt then partially travels down the line to your home.
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
the problem then depends on "how fast does the fuse operate?".
One is “what exactly is in a ‘surge protector’ ? ”
The other is “what does a “fuse” do?”
The third is lightning and “how it gets conducted into a home.”
Edit 2024–10.
This is where this question deviates from being a 'generic' question, and becomes more specific.
The MOV will conduct when the voltage exceeds 50% of line voltage.
[image of Common-mode choke]
This is where the MOV conducts again, and dissipated the energy.
There are two important concepts here.
Barnstars:
nine
2024–10–10[John johnson John Johnson ]
So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
At one ohm, the resistor has a maximum of 1 watt power.
It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
But… the neutral is now “floating” because of the 1 ohm resistance.
Upvotes:
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
“ 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”
It also is a device that limits the change in current flow.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
A fuse is a non-resetable over current circuit protector.
What is lightning?
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
He then describes Rainy Season and Lightning.
One
This is the picture of an electronic coil of wire wound around a core of magnetic material.
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.
At least they know the answer if they wanted it.