Ground connection monitor

Details Ground connection monitor Ground connection monitor

1984-10-22

1987-01-20

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 3102

Patent

active

046382445

ABSTRACT:
A circuit is employed to determine the presence of an open ground connection between a power source and a movable machine connected with the power source by means of a flexible cable. The circuit comprises a pulse generator for transmission of a pulse along the cable between the power source and the movable machine in combination with comparison means for determining whether the reflected pulse back along the cable from the movable machine becomes inverted upon reflection. The presence of a non-inverted reflected pulse indicates an open ground connection. Means are provided for disconnection of power between the power source and the movable machine upon the absence of receipt of an inverted reflected pulse along the connecting cable.

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