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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2024–10–16 [ OO OLAOYE OYEBODE ]

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.

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

so, what happens?

There are three different concepts here that are getting confused.

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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.

But it can get overloaded, and no longer works.

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

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?

2024–10–10[John johnson John Johnson ]

Is it possible that my TF caused a kundalini awakening in another person? He is famous because He is a singer. We have not met physically yet, but I have gone through kundalini awakening and DNOTS and their ongoing. I have also had soul recognition so I know for sure that He is my Divine Counterpart and I do not have any doubts about it. But it is indeed perplexing that somebody had an awakening at the physical level because of Him. Is it a test for me? I have a mixture of feelings. On one hand I marvelled at Him and empathised with the person and on the other, I doubt if this just a test for me. I would appreciate your pov. Thank you for much.

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

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

First Sentence:

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This one hit behind the barn.

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

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

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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.

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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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.

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

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Barnstars:

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

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There are two important concepts here.

2024–10–14 [Omar Gharbi Omar Gharbi ]

Edit 2024–10.

There is any scientific evidence that we live in a sphere. Why do others say that we lives in a flat Earth but there is no evidence that they have proven the existence of a flat earth?

At least they know the answer if they wanted it.

The other is “what does a “fuse” do?”

Upvotes:

What have you learned from your parents' mistakes?

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

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

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He then describes Rainy Season and Lightning.

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

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

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

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

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

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

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

He then describes the function of a fuse.

(Dc diagram shown, AC is similar).

what exactly is a ‘surge’ protector?

“ 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”

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

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.

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

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

What is lightning?

This is 'the assistant's answer'

[image of Common-mode choke]

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.

I post the exact comment here.

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.

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

What does a fuse do?

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

This device then solves the entire problem.

[old diagram got deleted by accident]

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

2024–10–00 [ Ammar Mahdi ] Ammar Mahdi

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

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

Here is a simplified AC power diagram.

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

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

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

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.

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.

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

2024–10–11 [Victor Olarewsju Victor Olarewaju ]

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

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

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

He then asserts :

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

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

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