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: 02.07.2025 00:55
An AC voltage/ current source, and an ac inductive load.
He then asserts :
In schematic diagrams this is the symbol for a fuse:
Origami structures unfold into seamless surfaces for deployable applications - Phys.org
OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.
2024–10–16 [ OO OLAOYE OYEBODE ]
It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.
How one of San Francisco's most successful new chains 'just kind of happened' - SFGATE
For this case there are devices called Metal oxide varistors (MOV).
This is 'the assistant's answer'
2024–10–11 [Victor Olarewsju Victor Olarewaju ]
Dobbins: 'No-brainer' joining ascending Broncos - ESPN
Edit 2024–10.
These devices are installed between the “hot” and “neutral” and protective ground.
P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.
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 exactly is a ‘surge’ protector?
(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).
This device then solves the entire problem.
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.
Is there any new American thing?
I post the exact comment here.
Because the load is inductive, the current lags the voltage.(by a bit).
This is where this question deviates from being a 'generic' question, and becomes more specific.
Flipping two atoms in LSD turned it into a powerful treatment for damaged brain circuits - PsyPost
Can the fuse protect the electronic devices from lightning instead of a surge protector.
A fuse is a non-resetable over current circuit protector.
It seems Mohan does not understand the difference between a comment and an Answer.
Who writes and reads novels nowadays?
One is “what exactly is in a ‘surge protector’ ? ”
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.
This is the picture of an electronic coil of wire wound around a core of magnetic material.
And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.
2024–10–11 [Bobby Sanchez Bobby Sanchez ].
King Charles praised for 'faultless' firing technique at Larkhill - BBC
There are two important concepts here.
“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”
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.
U.S. Open power rankings: Every player at Oakmont ranked Nos. 1-156 - NBC Sports
First Sentence:
[old diagram got deleted by accident]
What is lightning?
Where you live may affect your risk of dementia, UCSF study finds - San Francisco Chronicle
At least they know the answer if they wanted it.
A circuit breaker is similar, but is resettable.
This is where the MOV conducts again, and dissipated the energy.
First Galaxy Buds Core image reveals a lack of premium design - SamMobile
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.
Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.
The other is “what does a “fuse” do?”
What are some common health concerns for senior citizens?
2024–10–00 [ Ammar Mahdi ] Ammar Mahdi
The third is lightning and “how it gets conducted into a home.”
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.
“ A fuse is a device which protects the (circuit) against overload and short circuit.”
the problem then depends on "how fast does the fuse operate?".
Upvotes:
The MOV will conduct when the voltage exceeds 50% of line voltage.
so, what happens?
eight
So, the voltage could go up to 500 volts, and the fuse will not open up.
[image of Common-mode choke]
He then describes Rainy Season and Lightning.
The bolt then partially travels down the line to your home.
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.
So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.
Barnstars:
Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.
When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.
But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).
but I think this circuit , shows a few more pieces.
(Dc diagram shown, AC is similar).
One
This one hit behind the barn.
But… the neutral is now “floating” because of the 1 ohm resistance.
At one ohm, the resistor has a maximum of 1 watt power.
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 “.
Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".
nine
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.
2024–10–10[John johnson John Johnson ]
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?
a photo is worth a thousand words.
so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.
Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.
It also is a device that limits the change in current flow.
“ 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”
Here is a simplified AC power diagram.
2024–10–14 [Omar Gharbi Omar Gharbi ]
He then describes the function of a fuse.
If the nominal power is 4,000 watts then the current at 230volts is 16 amps.
But it can get overloaded, and no longer works.