Power conditioning device and method

Details Power conditioning device and method Power conditioning device and method

1992-07-29

1995-09-05

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transient responsive

361 42, H02H 904

Patent

active

054484430

ABSTRACT:
A power conditioning device protects sensitive electronics in modern electronic equipment from disruption or destruction caused by transients which can cause both induction and injection currents into the grounding system of the electronic equipment. This device nominally comprises an isolation transformer and a ground impedance between the earth ground connection from a distribution panel and the safety ground connection to the powered equipment. In addition, this device may also comprise a voltage clamping device such as an MOV and a capacitive filter to provide a complete power line conditioner. This device may be used in systems with guarded or driven grounds, or in a system with a high voltage reference to safety ground. In addition, ground conditioning can be added to a Ground Fault Circuit Interrupter (GFCI) to attenuate ground surge currents. The ground impedance may take many forms, including inductors, resistors, diodes, gas tubes, transformers, capacitors, or combinations of these or other components. The ground conditioning device may be used on power systems of different voltages and frequencies, including three phase power systems.

REFERENCES:
patent: 4180841 (1979-12-01), Engel
patent: 4573098 (1986-02-01), Williston
patent: 4882646 (1989-11-01), Genuit
patent: 5174293 (1992-12-01), Hagiwara
patent: 5177657 (1993-01-01), Baer et al.

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