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?

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Edit 2024–10.

so, what happens?

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

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.

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.

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

These are simplified answers to the original question, and does not change anything I wrote above.

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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P = e* I, so since I is 16 amps, then the voltage dropped is 1/16 volt or 0.0650 volts.

This device then solves the entire problem.

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

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

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

There are two important concepts here.

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

What is lightning?

2024–10–16 [ OO OLAOYE OYEBODE ]

Who are the archers in Genesis 49:23?

He then describes Rainy Season and Lightning.

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

It’s been three xxx five werks, and there has been no response to my follow on query on his Commment to my answer.

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And this is the problem alone. Is the power supply in the equipmemt designed with a lightning strike in mind? Some yes, others, no.

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

This is 'the assistant's answer'

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There are three different concepts here that are getting confused.

[image of Common-mode choke]

First Sentence:

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

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

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

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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.

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

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[old diagram got deleted by accident]

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.

I post the exact comment here.

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.

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

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

Here is a simplified AC power diagram.

Barnstars:

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.

“ 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.

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

“ 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”

2024–10–14 [Omar Gharbi Omar Gharbi ]

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

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2024–10–11 [Victor Olarewsju Victor Olarewaju ]

A circuit breaker is similar, but is resettable.

He then describes the function of a fuse.

This one hit behind the barn.

In schematic diagrams this is the symbol for a fuse:

But it can get overloaded, and no longer works.

2024–10–00 [ Ammar Mahdi ] Ammar Mahdi

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

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

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

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

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

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?".

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

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

What does a fuse do?

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

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

so, the loop of wire then, when put together with another loop reduces the ‘noise’ on a power line.

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

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.

Upvotes:

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

(Dc diagram shown, AC is similar).

At least they know the answer if they wanted it.

The other is “what does a “fuse” do?”

what exactly is a ‘surge’ protector?

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

a photo is worth a thousand words.

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

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

At one ohm, the resistor has a maximum of 1 watt power.

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.

He then asserts :

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?