Circuit breaker with digital solid-state trip unit fitted...

Details Circuit breaker with digital solid-state trip unit fitted... Circuit breaker with digital solid-state trip unit fitted...

H - Electricity

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H02H 3/093 (2006.01) H02H 1/00 (2006.01) H02H 3/05 (2006.01)

Patent

CA 1241728

Abstract CIRCUIT BREAKER WITH DIGITAL SOLID-STATE TRIP UNIT FITTED WITH A CALIBRATION CIRCUIT Microprocessor-based solid-state trip unit (48) processing dig- ital signals derived from analog signals supplied by current sensors (16). The analog signals are applied to a calibration circuit (34), which adapts the output range of the analog cir- cuits to that of the logic circuits, to obtain with an 8-bit Analog-to-Digital Converter (50) associated with a Multiplexer (29) a range equivalent to that of 12-bit processing systems.

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