Solid state switch with quasi-predictive short circuit...

Details Solid state switch with quasi-predictive short circuit... Solid state switch with quasi-predictive short circuit...

2007-09-04

2007-09-04

Sherry, Michael (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

Reexamination Certificate

active

11043009

ABSTRACT:
A protection circuit detects short circuit and/or current overload conditions based on one of a current level and a current change rate di/dt of a current through a load. A detection device uses an inductor to detect current change rate and a resistor to detect current level, and generates a first voltage signal based on the voltages of the inductor and the resistor. A comparator generates a second voltage signal based on the voltage signal and a reference voltage signal. A switching circuit allows or interrupts current through the load based in part on the second voltage.

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patent: 2003/0151860 (2003-08-01), Bryan

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