Electronic circuit for protecting power supply to a load

Details Electronic circuit for protecting power supply to a load Electronic circuit for protecting power supply to a load

H - Electricity

02

H

H02H 3/08 (2006.01) H02H 3/02 (2006.01) H02H 9/02 (2006.01)

Patent

CA 2213193

A circuit provides instantaneous restriction of current supplied to a load from a power supply to a predetermined maximum current by controlling fluid current through a first transistor using a second transistor responsive to voltage across a resister in series of the first transistor to control flow of a current from the base of the first transistor. The actuation of the first transistor to restrict maximum current causes charging of a capacitor at a predetermined rate to a predetermined threshold voltage at which time a threshold device actuates the second transistor to cause switching off of the first transistor to halt any current flow to the load.

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