Ground fault circuit interrupter with immunity to wide band...

Details Ground fault circuit interrupter with immunity to wide band... Ground fault circuit interrupter with immunity to wide band...

H - Electricity

02

H

H02H 3/16 (2006.01) H02H 1/04 (2006.01) H02H 3/33 (2006.01)

Patent

CA 2132136

In a ground fault circuit interrupter in which it was found that wide band noise induced by load transients is rectified by an op-amp In the detector circuit, false trips due to the wide band noise are eliminated by only comparing the output of the amplifier with a threshold of opposite polarity to that of the rectified noise signal and by eliminating capacitive coupling between the current sensor and the op amp. This requires an op amp with a low offset, on the order of about five percent or less.

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