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Author Topic: Popping a 5000 amp fuse  (Read 3357 times)

Dave Garoutte

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Re: Popping a 5000 amp fuse
« Reply #10 on: June 11, 2021, 06:33:58 PM »

So anyone know what the application for a 5000A fuse is?
It's what you need to keep Lucas electric on your Brit bike from failing.
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Ike Zimbel

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Re: Popping a 5000 amp fuse
« Reply #11 on: June 11, 2021, 06:54:30 PM »

You can't always get what you want.... x100.
Ha! I got this one  :P...not sure who else did. AND, I didn't even watch the video :P
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Chris Hindle

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Re: Popping a 5000 amp fuse
« Reply #12 on: June 12, 2021, 06:41:20 AM »

It's what you need to keep Lucas electric on your Brit bike from failing.
Why do Englishmen like warm beer?
It's because they have Lucas refrigerators.

Lucas, the Prince of Darkness

Back in my mechanics days, i made good coin getting the smoke back into MG and Triumph "electrics"....
Chris.
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Tim McCulloch

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Re: Popping a 5000 amp fuse
« Reply #13 on: June 12, 2021, 10:37:53 AM »

Why do Englishmen like warm beer?
It's because they have Lucas refrigerators.

Lucas, the Prince of Darkness

Back in my mechanics days, i made good coin getting the smoke back into MG and Triumph "electrics"....
Chris.

Lucas in Triumph - every wire the same color.  Bah, humbug.
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Dave Garoutte

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Re: Popping a 5000 amp fuse
« Reply #14 on: June 12, 2021, 10:55:39 AM »

Why do Englishmen like warm beer?
It's because they have Lucas refrigerators.

Lucas, the Prince of Darkness

Back in my mechanics days, i made good coin getting the smoke back into MG and Triumph "electrics"....
Chris.
Lucas also invented the flashdark.
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Chris Grimshaw

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Re: Popping a 5000 amp fuse
« Reply #15 on: June 12, 2021, 11:05:52 AM »

So anyone know what the application for a 5000A fuse is?


Output fuse on a Macrotech.

More seriously, a family member works on newspaper printing presses. Some of those drives are rated for 1MW. Even the medium-sized drives won't turn with anything less than 240V 3-phase applied.

Some industrial stuff, then, might require a fuse of that kind of size.

Chris
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Frank Koenig

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Re: Popping a 5000 amp fuse
« Reply #16 on: June 12, 2021, 11:15:04 AM »

So anyone know what the application for a 5000A fuse is?

It's interesting that it's just a bunch of 100A in parallel.  Anyone know if that's how all the fuses larger than 100A are built?

Dunno for sure but my guess is that you'll find them in low-voltage, high-current applications such as electroplating. Interrupting that much current at high voltage requires more advanced methods of suppressing the arc. --Frank

I'll add that high-power BEVs can run ~1000 A at ~400 V when you floor it, so that's getting up there.
« Last Edit: June 12, 2021, 11:20:11 AM by Frank Koenig »
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Craig Hauber

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Re: Popping a 5000 amp fuse
« Reply #17 on: June 12, 2021, 12:08:15 PM »

Dunno for sure but my guess is that you'll find them in low-voltage, high-current applications such as electroplating. Interrupting that much current at high voltage requires more advanced methods of suppressing the arc. --Frank

I'll add that high-power BEVs can run ~1000 A at ~400 V when you floor it, so that's getting up there.

The original ubiquitous "non-battery" EV, (commonly known as a diesel-electric locomotive), average around 3.2MW from their onboard power plant -I bet there's some large current fuses in those. 
Not to mention some interesting computer controlled traction control via very large solid-state motor drives.

-I'm always been fascinated by anything that starts with logic-level voltages in microscopic silicon ending up in control of stunning amounts of raw current! 

Do they have multi-megawatt breakers that wouldn't need contacts rebuilt after opening (especially with DC)?  Possibly would be too large and heavy for anything other than stationary power-plant or substation usage?

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Chris Hindle

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Re: Popping a 5000 amp fuse
« Reply #18 on: June 12, 2021, 01:14:55 PM »

Lucas in Triumph - every wire the same color.  Bah, humbug.
I had to "fix" the tail lights on an late 60's MG something or other.
EVERY FUCKIN WIRE WAS WHITE!
No tracers, no nuthing.
Way to go Lucas.....................
Chris.
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Keith Broughton

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Re: Popping a 5000 amp fuse
« Reply #19 on: June 12, 2021, 07:23:57 PM »

:o

"Popping" seems a tad bit understating!
They are English after all, so, understated just a tad. :D
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Re: Popping a 5000 amp fuse
« Reply #19 on: June 12, 2021, 07:23:57 PM »


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