Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1994-03-11
1995-06-13
Deboer, Todd
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
361 46, 361 50, H02H 316
Patent
active
054248930
ABSTRACT:
A gas discharge device, such as a neon tube, is connected to a pair of output terminals of a power supply. The power supply has a transformer with a secondary winding that has first and second sub-windings. Each of the sub-winding is connected to a different output terminal and two conductors connect the first and second sub-windings to earth ground. A current sensor detects whether unequal magnitudes of current flow through in the two conductors. A resonant control circuit applies an excitation current to the primary winding of the transformer unless an imbalance of current flows. Thus excitation of the transformer is terminated when a high voltage ground fault occurs.
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Francis, Jr. Ralph M.
Garjian Michael
DeBoer Todd
Haas George E.
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