A fast electronic fuse =
designed=20
to operate on 230V AC with an adjustable trip current. When the current =
through=20
the load exceeds a level determined by the position of the wiper on the =
1k=20
wire-wound pot, this circuit cuts off the load immediately. If S1 is =
open, the=20
range is approximately 300-650 mA, and 0.8-2A when it is closed.
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The=20
key variable in the operation of the fuse is the voltage drop across the =
power=20
resistor(s) which are connected in series with the load. This voltage =
drop is=20
directly proportional to the current the load draws. When this current =
is low,=20
the voltage acr visit page. =20
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=20
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