Grounding detection circuit

Details Grounding detection circuit Grounding detection circuit

1990-03-29

1992-05-12

Stephan, Steven L.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361215, 340649, H02H 316

Patent

active

051133032

ABSTRACT:
An improved grounding detection circuit includes an intrinsically safe circuit connected to a grounding clip for grounding vehicles and container durng the transfer and storage of combustible materials. The intrinsically safe circuit includes grounding loop for verifying that the grounding clip and the intrinsically safe circuit are grounded. The intrinsically safe circuit transmits a signal to an optoisolator when the container is grounded, and the optoisolator, in turn, transmits an energization signal to relay circuitry, to energize a relay coil. A capacitor in series with a resistor are connected across the relay coil to minimize the inductive effect of the relay coil on the optoisolator.

REFERENCES:
patent: 3290668 (1963-08-01), Perretta
patent: 3343154 (1964-12-01), Seesselberg
patent: 4419589 (1983-12-01), Ross
patent: 4691263 (1987-09-01), Kenny

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