Ground detector for a static grounding system

Details Ground detector for a static grounding system Ground detector for a static grounding system

1998-10-05

2000-02-29

Gaffin, Jeffrey

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 50, 361 86, 340649, H02H 314

Patent

active

060317000

ABSTRACT:
A ground detector includes a detecting circuit formed of a polarity test circuit, a voltage dropping and rectifying circuit, a grounding test circuit and an alarm device, wherein the polarity test circuit leads in AC power supply and tests the polarity of its power wires so as to discriminate the standard zero potential circuit of the earth wire or neutral wire for grounding test reference; the voltage dropping and rectifying circuit converts lead-in AC power supply into DC power supply for working of the grounding test circuit; the grounding test circuit leads in the zero potential wire which is identified by the polarity test circuit, and compares its potential with the test circuit, so as to determine the grounding condition of the grounding bus, and to drive the alarm device when an error grounding of the rounding bus is detected, causing the alarm to output an audio alarm signal.

REFERENCES:
patent: 3708721 (1973-01-01), Marcade et al.
patent: 3891894 (1975-06-01), Scarpino
patent: 3996496 (1976-12-01), Volk, Jr.
patent: 4023073 (1977-05-01), Georgi
patent: 4558309 (1985-12-01), Antonevich
patent: 4649454 (1987-03-01), Winterton
patent: 5726900 (1998-03-01), Walter et al.
patent: 5754114 (1998-05-01), Gnadt

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