Overvoltage transient protection for low side circuits

Details Overvoltage transient protection for low side circuits Overvoltage transient protection for low side circuits

2005-12-13

2005-12-13

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

C361S091100

Reexamination Certificate

active

06975493

ABSTRACT:
A low side overvoltage protection circuit configuration comprising: a first switching device in operable communication with and disposed between a ground and a protected ground; a load in operable communication with and disposed between a voltage source and the protected ground; a control circuit configured to control the first switching device in operable communication with a transient protected voltage source. The first switching device is configured to provide electrical circuit isolation of the protected ground from the ground. Also, a method for providing a low side circuit overvoltage protection comprising: detecting an overvoltage transient on a voltage source; isolating a protected ground from a circuit ground with a first switching device; and controlling the first switching device with a control circuit in operable communication with transient protected voltage source. The control circuit is responsive to an overvoltage transient of the voltage source.

REFERENCES:
patent: 4005342 (1977-01-01), Davis
patent: 4890020 (1989-12-01), Bird
patent: 6043965 (2000-03-01), Hazelton et al.
patent: 6154081 (2000-11-01), Pakkala et al.
patent: 6198350 (2001-03-01), Zarabadi
patent: 6204715 (2001-03-01), Sellnau et al.
patent: 6392266 (2002-05-01), Robb et al.

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