H - Electricity – 02 – H
Patent
H - Electricity
02
H
323/7
H02H 9/04 (2006.01) H02H 3/06 (2006.01) H02H 3/08 (2006.01) H02H 3/20 (2006.01) H02H 9/06 (2006.01)
Patent
CA 1291207
ABSTRACT OF THE DISCLOSURE An auto-reset circuit breaker for interrupting an electrical current in a line to be protected, when the current exceeds a predetermined value. The circuit breaker comprises: at least once solid state silicon switch series mounted in a line to be protected, said silicon switch responsive to a first control signal to open said switch and interrupt the current flowing therethrough; a first means for measuring a variable voltage drop across at least one element series mounted in said line to be protected, said first means generating a trip signal when said voltage drop and said electrical current exceed predetermined values; a second means responsive to at least one trip signal for providing said first control signal to said solid state switch, said control signal effective to open said switch when said electrical current exceeds said predetermined value; and delay means responsive to said trip signal for enabl- ing said second means for a delay period, whereby said electrical current is periodically sampled at said delay intervals until the electrical current drops below its predetermined values.
493761
Ahuja Om
Mcfadden Fincham
LandOfFree
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