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?

what exactly is a ‘surge’ protector?

He then describes Rainy Season and Lightning.

(Dc diagram shown, AC is similar).

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2024–10–16 [ OO OLAOYE OYEBODE ]

a photo is worth a thousand words.

but this device (an Inductor) … impedes the rapid changes in the current.

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At least they know the answer if they wanted it.

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.

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I post the exact comment here.

“ 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 problem then depends on "how fast does the fuse operate?".

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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.

Because the load is inductive, the current lags the voltage.(by a bit).

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so, what happens?

But it can get overloaded, and no longer works.

But… the neutral is now “floating” because of the 1 ohm resistance.

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This is 'the assistant's answer'

OK, this is Mohan Rajaratnam’s definition of a Surge suppressor.

This one hit behind the barn.

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There are three different concepts here that are getting confused.

When the current is 200% of the rated value , it will “go open” (the link metal melts) and protect the device.

What does a fuse do?

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The bolt then partially travels down the line to your home.

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.

2024–10–00 [ Ammar Mahdi ] Ammar Mahdi

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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.

“ … to protect building, lightning arrestor, is provided above building and directly connected to earth.”

Is the question then , "why buy a surge supressor, if the fuse alone protects the electronic circuits from a lightning bolt?".

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Here is a simplified AC power diagram.

A fuse is a non-resetable over current circuit protector.

Fuses, on their own, then operate much slower than the MOV variable resistance, during the lightning strike.

Hello, I have a question about astral projection. I started to get interested in this a little while after my mum passed in april. I thought I may be able to see her and speak with her if I managed to achieve astral projection. Since this interest, every time i sleep on my back I go into sleep paralysis. However, I cant progress into astral projection because it is very scary for me as I feel like I'm suffocating when this happens. I panic and force myself to wake up. This only ever happened about once a year before this. It sometimes lasts a long time. This has happened about 3 times per week since my mum died, as mentioned on a previous post. I no longer try to go into it anymore(due to the suffocating feeling), but it still happens. I read that sleep paralysis is the pathway to astral projection. Why has this started to happen so frequently since simply taking an interest in it? Is this connected to the afterlife? I am concerned about it as I now cannot seem to stop this happening. Could it be my mum trying to communicate? Im asking due to more knowledge around this in this group.

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.

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.

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These devices are installed between the “hot” and “neutral” and protective ground.

2024–10–14 [Omar Gharbi Omar Gharbi ]

So, the voltage could go up to 500 volts, and the fuse will not open up.

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The MOV will conduct when the voltage exceeds 50% of line voltage.

First Sentence:

This is the picture of an electronic coil of wire wound around a core of magnetic material.

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This device then solves the entire problem.

Edit 2024–10.

So, it’s possible that these devices from Trip Lite have addition suppression devices, these ones seem to be sturdy.

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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.

[old diagram got deleted by accident]

For this case there are devices called Metal oxide varistors (MOV).

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.

[image of Common-mode choke]

There are two important concepts here.

But during the surge, the fuse will not blow if it is a longer duration and lower value )10 to 50%).

Now when you have a certain ac resistance, then a current flows in a loop.

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.

He then asserts :

The third is lightning and “how it gets conducted into a home.”

An AC voltage/ current source, and an ac inductive load.

The other is “what does a “fuse” do?”

Would individual surge supressors have save this equipment? most likely, since the surge supressor would take the jolt instead of the electronic components.

2024–10–10[John johnson John Johnson ]

One is “what exactly is in a ‘surge protector’ ? ”

It also is a device that limits the change in current flow.

If the nominal power is 4,000 watts then the current at 230volts is 16 amps.

Upvotes:

Barnstars:

This is where this question deviates from being a 'generic' question, and becomes more specific.

2024–10–11 [Victor Olarewsju Victor Olarewaju ]

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.

In schematic diagrams this is the symbol for a fuse:

Mohan forgets that a fuse is a one-time device, and needs to be replaced if it is tripped.

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.

“ A fuse is a device which protects the (circuit) against overload and short circuit.”

but I think this circuit , shows a few more pieces.

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?

2024–10–11 [Bobby Sanchez Bobby Sanchez ].

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This is where the MOV conducts again, and dissipated the energy.

(There is no concept of polarity, in the loop because the current changes direction 100 to 120 times a second (power frequency).

So combined with a device called a MOV or Metal-oxide-resistor, then forms the 3rd part of a “surge suppressor “.

It seems Mohan does not understand the difference between a comment and an Answer.

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Can the fuse protect the electronic devices from lightning instead of a surge protector.

What is lightning?