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From: john larkin <JL@gct.com>
Newsgroups: sci.electronics.design
Subject: Re: electrical deaths
Date: Fri, 29 Nov 2024 18:18:10 -0800
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On Fri, 29 Nov 2024 23:20:16 +0100, "Carlos E.R."
<robin_listas@es.invalid> wrote:

>On 2024-11-29 18:22, john larkin wrote:
>> On Fri, 29 Nov 2024 14:32:01 +0100, "Carlos E.R."
>> <robin_listas@es.invalid> wrote:
>> 
>>> On 2024-11-28 21:17, Cursitor Doom wrote:
>>>> On Thu, 28 Nov 2024 11:33:59 -0500, Joe Gwinn wrote:
>>>>
>>>>> I have a similar story, from a colleague who had worked at one of the
>>>>> big accelerators in the US Argonne National Lab in the 1960s.  He worked
>>>>> in the powerhouse that provided 20,000 amps at 10 volts DC to the
>>>>> accelerator field coils (which were water-cooled copper then), delivered
>>>>> over a par of large copper bus-bars side by side.  One day,
>>>>> he happened to drop a big steel wrench across the buss bars. The wrench
>>>>> evaporated with a bang, and the power system carried on. Startled but
>>>>> unhurt, he called the accelerator control room and asked - they looked
>>>>> and saw no indication of that momentary short.
>>>>>
>>>>> .<https://www.anl.gov/>
>>>>
>>>> This crazy English guy shorts out 50,000 Amps for a bit of fun!
>>>>
>>>> https://www.youtube.com/watch?v=0mGhhdPgXG8&t=7s
>>>
>>> !!!
>> 
>> Cool. I wonder is there is a market for 10,000 amp pulse generators.
>> Sounds interesting.
>
>Being picky, he failed to blow the 5000A fuse with a 50,000A current. He 
>provided such current for an instant, which blew the fuse partly. In a 
>real application, the high current would continue flowing through the 
>other elements of the fuse, a bigger current per element than rated, and 
>the rest of the fuse elements would blow in cascade till not one would 
>be left alive.

Right, the pulse was showy but short. In theory, a fuse blows from
enough I^2T.