Ground-fault monitor for multiple circuits

Details Ground-fault monitor for multiple circuits Ground-fault monitor for multiple circuits

2007-12-25

2007-12-25

Sherry, Michael (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

Reexamination Certificate

active

10959755

ABSTRACT:
A ground fault monitor for an electrical system having a plurality of branch circuits each having a respective ground conductor extending to a service panel that includes a ground connection to which the ground conductors are electrically connected. The ground fault monitor includes a current transformer for sensing current flow through the plurality of ground conductors to the ground connection and generating a current flow signal representative of any sensed current flow, and a monitoring circuit responsive to the current transformer for monitoring the current flow signal and generating an alarm when the current flow signal indicates the presence of a ground fault.

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National Semi Conductor, Jun. 1992, LM 1851 Ground Fault Interrupter.

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