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Old 07-23-2020, 09:19 AM   #1
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Default What Is the Difference Between a Breaker and a Fuse?

Hi Guys,

What Is the Difference Between a Breaker and a Fuse? because I'm not entirely sure and I've been asked this question but I couldn't answer in detail.
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Old 07-23-2020, 09:21 AM   #2
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Hi Guys,

What Is the Difference Between a Breaker and a Fuse? because I'm not entirely sure and I've been asked this question but I couldn't answer in detail.

One is broke and the other fused together.


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Old 07-23-2020, 09:45 AM   #3
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Sometimes, albeit rarely, a fuse will have enough pixie dust left inside of it to ohm good with a DMM, but not carry current to the device.
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Old 07-23-2020, 10:10 AM   #4
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Hi Guys,

What Is the Difference Between a Breaker and a Fuse? because I'm not entirely sure and I've been asked this question but I couldn't answer in detail.
Fuse is one time. Breaker is reset-able and with out knowing your electrical background its not worth getting any deeper into details you may or may not understand.
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Old 07-23-2020, 10:19 AM   #5
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Sometimes, albeit rarely, a fuse will have enough pixie dust left inside of it to ohm good with a DMM, but not carry current to the device.
Even more so on replaceable links were they reuse the silica.
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Old 07-23-2020, 11:00 AM   #6
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More often then not, a fuse will open quicker but breaker but technology has caught up and some are now faster than a fuses.

Tim
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Old 07-23-2020, 12:00 PM   #7
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More often then not, a fuse will open quicker but breaker but technology has caught up and some are now faster than a fuses.

Tim
HACR ckt breakers were a way for breaker companies to compete with fuse companies.
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Old 07-23-2020, 12:01 PM   #8
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Close a Breaker,

Open a Valve,...
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Old 07-23-2020, 01:38 PM   #9
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Close a Breaker,

Open a Valve,...
Then what The panel floods with water and goes boom
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Old 07-23-2020, 01:51 PM   #10
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Hi Guys,

What Is the Difference Between a Breaker and a Fuse? because I'm not entirely sure and I've been asked this question but I couldn't answer in detail.
A breaker and a fuse are both an overcurrent protective device. As mentioned fuses would tend to open the circuit faster than breakers thus they were spec'ed for jobs where the fast opening of a circuit was critical. They do basically the same thing-- they protect the circuit from over current, short circuit and ground fault.
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Old 07-23-2020, 01:55 PM   #11
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A breaker is an on/off switch that sometimes opens the circuit before the explosion.
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Old 07-23-2020, 03:14 PM   #12
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A breaker is an on/off switch that sometimes opens the circuit before the explosion.

Don’t tell our safety manager that. He KNOWS that breakers are not switches.
Switches are switches...
He also turns the main off at home to change bulbs, just in case.
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Old 07-23-2020, 04:02 PM   #13
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Don’t tell our safety manager that. He KNOWS that breakers are not switches.
Switches are switches...
He also turns the main off at home to change bulbs, just in case.
Sounds kind of like a safety guy at a place I used to work at. Flagged me down because there was a puddle of water NEXT TO the end of an extension cord. I walked over to the outlet it was plugged into 15 feet away and unplugged it. He threatened to write me up for a lockout tagout violation. He got fired about a year later and I when I left more than a year after that it was on my own terms with well wishes.
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Old 07-23-2020, 05:39 PM   #14
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More often then not, a fuse will open quicker but breaker but technology has caught up and some are now faster than a fuses.

Tim

Not anything more: semiconductor fuses trip in 1-2 ms. The only breakers that fast are solid state ones but those are really more of a soft start than a breaker. Fuses also have nearly unlimited interrupting current but not breakers. To get above 65 kA “breakers” have fuses built in. Standard fuses trip in 4 ms while the fastest small breakers trip in 16-20 ms.
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Old 07-23-2020, 05:44 PM   #15
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Don’t tell our safety manager that. He KNOWS that breakers are not switches.
Switches are switches...
He also turns the main off at home to change bulbs, just in case.

Large distribution and transmission level breakers are called switches. At medium voltage electronic switches (SCRs, GCTs, HVIGBTs) are called valves.
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Old 07-23-2020, 08:29 PM   #16
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More often then not, a fuse will open quicker but breaker but technology has caught up and some are now faster than a fuses.

Tim

If sensitive equipment is involved a fuse is often the best way to go.
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Old 07-23-2020, 08:50 PM   #17
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Then what The panel floods with water and goes boom


Seen it!
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Old 07-23-2020, 08:52 PM   #18
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A breaker is an on/off switch that sometimes opens the circuit before the explosion.

"Sometimes" being the key operative phrase!


FPE and Zinsco the opposite more often than not!
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Old 07-29-2020, 11:46 AM   #19
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How is it that there are 2 pages of responses to this when we haven't even solved the notched stud problem? 🤣🤣🤣
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