Re: 3 blown Power supply's in 6 months.

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And again, fuse designed to blow so that "damage to the
lines/devices" created by component failure does not threaten
human life. Any device whose destruction can harm humans will
be disconnected by fuses and other equivalent 'one shot'
devices. The fuse is not installed to protect hardware. In
the process of protecting humans, a fuse may protect some
hardware - ie a power cord. But fuses are installed to
protect humans. Any protected hardware is incidental.

When a fuse blows in a power supply, a failed component
often causes that open fuse. Even shorting all power supply
outputs would not blow a fuse. The concept is called
fold-back current limiting. The fuse is for human
protection. It blows typically because a component inside the
supply has failed. Furthermore many power supplies don't use
fuses. Such human protection is found elsewhere in the power
supply design making the fuse unnecessary.

Leythos wrote:
> In article <427F9404.C731F0AE@xxxxxxxxxxx>, w_tom1@xxxxxxxxxxx says...
>> Again, fuses blow after the electronic damage has happened
>> so that the human is not put at risk. This being basic
>> electrical knowledge that even a computer assembler should
>> know.
>
> Sorry, the fuse it sized to prevent damage to the lines/devices, not to
> blow after the device has been damaged (although that may also happen).
>
> The fuse is sized to protect some part of the device, be it power lines,
> transformers, etc....
.

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