Ground fault electrical switching apparatus for coordinating tri

Details Ground fault electrical switching apparatus for coordinating tri Ground fault electrical switching apparatus for coordinating tri

1998-01-29

1999-10-19

Paladini, Albert W.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 46, 361 50, H02H 316

Patent

active

059699213

ABSTRACT:
A ground fault circuit breaker includes separable contacts for interrupting current flow in a protected AC electric system when opened. The protected AC electric system includes a ground fault switch, such as a ground fault receptacle having a people protection ground fault trip curve, downstream from the ground fault circuit breaker. A current transformer generates an AC sensor signal representative of AC current flowing from the protected AC electric system to ground. A ground fault controller, connected to the current transformer, generates a ground fault trip signal as a function of the AC sensor signal and an equipment protection ground fault trip curve. A trip means, which is responsive to the ground fault trip signal, opens the separable contacts.

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