A short-circuit limiting protector

Details A short-circuit limiting protector A short-circuit limiting protector

G - Physics

05

F

G05F 1/10 (2006.01) H02H 3/087 (2006.01) H02H 9/02 (2006.01) H03K 17/082 (2006.01) H03K 17/18 (2006.01) H03K 17/795 (2006.01) H02H 3/02 (2006.01) H02H 5/04 (2006.01) H03K 17/08 (2006.01)

Patent

CA 2127441

ABSTRACT OF THE DISCLOSURE The present invention provides a current limiting short- circuiting protector which utilizes an electronic and thermal feedback principle for achieving precise and rapid release of the protector, which can be readily reset. The principle utilizes a non-linear powerful temperature-dependent resistor in the collector circuit of a field effect transistor which serves as a current valve and through which the total current to be monitored is passed. The circuit replaces a conventional fuse and may also function as a load on/off control means. When a fault occurs in the load, the erroneous current is limited to a much lower value than is the case with a conventional fuse.

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