Re: programmable circuit breaker

piglet <erichpwagner@hotmail.com> wrote:

[...]

Aren’t fuses specified by minimum carrying current?

Automotive fuses are specified by blowing current (whatever that means)
but domestic fuses in the UK are specified by continuous carrying
current.

Then you have slow-blow types with extra thermal mass in the element or
low-melting-point alloys with a spring to pull the components apart,
quick-blow types and high-rupturing-capacity types (often filled with
sand to quench the arc).  Some industrial and telecomms fuses have
indicators to show they have blown - usually a flag that flips up or a
thinner fuse wire along the outside of the cartridge that can be seen to
have melted.  The flag can also close an alarm circuit.

Fuses ain't simple.

--
~ Liz Tuddenham ~
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www.poppyrecords.co.uk