CIRCUIT BREAKER WITH DIGITAL SOLID-STATE TRIP UNIT FITTED WITH A CALIBRATION CIRCUIT

摘要

CIRCUIT BREAKER WITH DIGITAL SOLID-STATE TRIP UNIT FITTED WITH A CALIBRATION CIRCUIT Microprocessor-based solid-state trip unit (48) processing digital 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 circuits 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.