Patent ID: 6788512
Filing Date: 2004-09-07
Classification: H02H

Abstract:
A trip unit including a sensor for sensing a condition of a circuit providing electricity to a load and a signal converter for converting signals generated by said sensor into a digital value indicative of said condition, and further comprising:a first selecting means configured to select a first trip setting value from a plurality of trip setting values; a second selecting means configured to select a second trip setting value from said plurality of trip setting values; a first storage device including said first trip setting value stored therein; a second storage device including said second trip setting value stored therein; a switch configured to switch between a digital means and an analog means for selecting said first and second trip setting values; and a microcontroller including an output generating a trip signal in response to said digital value indicative of said condition in the circuit and one of said first and second trip setting values selected by said switch.