Power protection device

Details Power protection device Power protection device

2005-09-20

2005-09-20

Leja, Ronald (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

C361S104000

Reexamination Certificate

active

06947266

ABSTRACT:
A power protection device protects electronic equipment from AC supply system disturbances. An electronically controlled relay circuit passes power to connected equipment if the electrical supply system, to which the equipment is connected, is properly wired for continuity and correct polarity of line, neutral, and ground conductors, and the line voltage is within twenty-five percent of nominal levels. Thermal cut-offs are used as a back-up to the over-voltage protection provided by the electronically controlled relay circuit. These thermal cut-offs are connected in a way that when either or both trip, the relay of the electronically controlled relay circuit is de-energized and power is disconnected to the device output stage and connected equipment.

REFERENCES:
patent: 4903161 (1990-02-01), Huber et al.
patent: 6646839 (2003-11-01), Chaudhry et al.
patent: 6683770 (2004-01-01), Marsh

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