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?

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

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.

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

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

I post the exact comment here.

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

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

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

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Upvotes:

[image of Common-mode choke]

2024–10–16 [ OO OLAOYE OYEBODE ]

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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.

so, what happens?

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What does a fuse do?

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

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

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

2024–10–11 [Victor Olarewsju Victor Olarewaju ]

2024–10–10[John johnson John Johnson ]

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’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.

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

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2024–10–00 [ Ammar Mahdi ] Ammar Mahdi

But it can get overloaded, and no longer works.

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

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

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.

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

There are two important concepts here.

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

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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.

Edit 2024–10.

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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a photo is worth a thousand words.

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.

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

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

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”

He then describes the function of a fuse.

2024–10–14 [Omar Gharbi Omar Gharbi ]

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

There are three different concepts here that are getting confused.

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

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

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.

This device then solves the entire problem.

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

He then describes Rainy Season and Lightning.

Barnstars:

The other is “what does a “fuse” do?”

what exactly is a ‘surge’ protector?

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

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

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?

[old diagram got deleted by accident]

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?".

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

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.

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

What is lightning?

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

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

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.

At least they know the answer if they wanted it.

(Dc diagram shown, AC is similar).

Here is a simplified AC power diagram.

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

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

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

This one hit behind the barn.

He then asserts :

In schematic diagrams this is the symbol for a fuse:

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

This is 'the assistant's answer'

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

A circuit breaker is similar, but is resettable.

First Sentence:

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