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the Fast Electronic Fuse

Fast Electronic Fuse

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Safety
Circuits / Security Circuits

A fast electronic fuse designed
to operate on 230V AC with an adjustable trip current. When the current through
the load exceeds a level determined by the position of the wiper on the 1k
wire-wound pot, this circuit cuts off the load immediately. If S1 is open, the
range is approximately 300-650 mA, and 0.8-2A when it is closed.

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The
key variable in the operation of the fuse is the voltage drop across the power
resistor(s) which are connected in series with the load. This voltage drop is
directly proportional to the current the load draws. When this current is low,
the voltage acr visit page.

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