Piezoelectrically actuated ground fault interrupter circuit appa

Details Piezoelectrically actuated ground fault interrupter circuit appa Piezoelectrically actuated ground fault interrupter circuit appa

1997-03-07

1999-01-19

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310317, 310358, 310332, H01L 4108

Patent

active

058617027

ABSTRACT:
A ground fault interrupter circuit ("GFIC") device having as a switching device a flextensional electroactive transducer which, when energized, opens a supply conductor between a current source and a load. When a fault current is detected a voltage is induced in a coil; due to the condition that there is less current running through the conductor from the load than through the conductor from the power supply which both extend through the core of the coil. The voltage induced in the coil is amplified by a transistor which causes the transducer to piezoelectrically "snap" from a first neutral position to a second neutral position thereby cutting of current from the power supply to the load.

REFERENCES:
patent: 4042967 (1977-08-01), Yamamoto
patent: 4473859 (1984-09-01), Stone et al.
patent: 5589725 (1996-12-01), Haertling

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