Combination ground fault and arc fault circuit interrupter
First Claim
1. A circuit protector comprising:
- a differential current transformer for producing a signal in response to a ground fault in the circuit;
an asymmetrical transformer for producing a signal in response to an arc fault in the circuit;
a ground fault detector connected to the differential current transformer; and
an arc fault detector connected to the asymmetrical transformer.
1 Assignment
0 Petitions
Accused Products
Abstract
A combined ground fault and arc fault circuit interrupter includes a differential current transformer, a hot electrical line and a neutral electrical line passing through the current transformer and forming the primary thereof, an asymmetrical current transformer having a core through which the hot and common electrical leads pass, and a secondary wound on the core for producing a signal more strongly responsive to the current in the common line than in the hot line. An arc fault detector is connected to the secondary of the second transformer, while a ground fault detector is connected to the secondary of the first transformer, and the outputs of the ground fault and arc fault detectors are both connected to a circuit interrupter arranged for disconnecting the circuit when either a ground fault or an arc fault is detected.
95 Citations
26 Claims
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1. A circuit protector comprising:
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a differential current transformer for producing a signal in response to a ground fault in the circuit;
an asymmetrical transformer for producing a signal in response to an arc fault in the circuit;
a ground fault detector connected to the differential current transformer; and
an arc fault detector connected to the asymmetrical transformer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification