Circuit interrupter with front panel numeric display

Details Circuit interrupter with front panel numeric display Circuit interrupter with front panel numeric display

H - Electricity

02

H

348/26

H02H 3/08 (2006.01) H02H 3/093 (2006.01) H02H 7/26 (2006.01)

Patent

CA 1162632

27 48,335 ABSTRACT OF THE DISCLOSURE A circuit interrupter includes a trip unit consisting of a microcomputer and a liquid crystal numeric display mounted on the front panel of the trip unit. A power supply provides operating power for the trip unit even after a tripping operation. A microcomputer includes read-only memory for storing instructions to cause the microcomputer to sequentially display numeric values corresponding to the present electrical conditions through the circuit interrupter and the parameters defining the time-trip characteristic of the interrupter. Storage means are provided to store the level of phase or ground current resulting in a tripping operation and for display- ing this value following a trip. Means are also provided for displaying a single digit numeric value indicating the cause of trip.

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