Arc detector transducer using an E and B field sensor
First Claim
1. An arc detector transducer for an electric circuit including an electrified conductor connecting a voltage source to a load, said arc detector transducer comprising an E field sensor sensing the E field established about said electrified conductor by the occurrence of an electrical arc in said circuit, and a B field sensor sensing the B field established about said electrified conductor by the occurrence of an electrical arc in said circuit, wherein said B field sensor comprises a current transformer around said electrified conductor, said current transformer comprising a core, a conductive coil wrapped around said core and having first and second leads, and a conductive shield enclosing said core and said coil, and wherein said shield comprises first and second annular cups facing each other and defining an enclosed annular space therebetween, and wherein said core and said coil are received in said annular space.
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Accused Products
Abstract
An arc detector antenna transducer (62) for an electric circuit has an electrified conductor (46) connecting a voltage source (26) to a load (30). The arc detector transducer includes an E field sensor (66) sensing the E field established about the conductor by the occurrence of an electrical arc in the circuit, and a B field sensor (68) sensing the B field established about the conductor by the occurrence of the electrical arc in the circuit.
147 Citations
5 Claims
- 1. An arc detector transducer for an electric circuit including an electrified conductor connecting a voltage source to a load, said arc detector transducer comprising an E field sensor sensing the E field established about said electrified conductor by the occurrence of an electrical arc in said circuit, and a B field sensor sensing the B field established about said electrified conductor by the occurrence of an electrical arc in said circuit, wherein said B field sensor comprises a current transformer around said electrified conductor, said current transformer comprising a core, a conductive coil wrapped around said core and having first and second leads, and a conductive shield enclosing said core and said coil, and wherein said shield comprises first and second annular cups facing each other and defining an enclosed annular space therebetween, and wherein said core and said coil are received in said annular space.
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5. An arc detector transducer for an electric circuit including an electrified conductor connecting a voltage source to a load, said arc detector transducer comprising an E field sensor sensing the E field established about said electrified conductor by the occurrence of an electrical arc in said circuit, said E field sensor comprising a first electrically conductive annular sleeve around said conductor, a second electrically conductive annular sleeve around said first sleeve, a third electrically conductive annular sleeve around said second sleeve and connected to ground, and an amplifier amplifying the voltage difference inducted between said first and second sleeves due to the E field.
Specification