General Electric Company

Robert C Turton

Roger N Castonguay

Charles L Jencks

Edwin J Collin

A removable keypad controls the electronic trip unit used within state-of-art electronic circuit breakers. The keypad allows inputting and displaying relevant circuit interruption information. Unauthorized access to the trip unit settings is prevented by blocking off the keypad 'ENTER' key while still allowing access to the keypad's remaining function keys.

Removable keypad for an electronic circuit breaker

A circuit breaker is provided with a hook operating to hold the breaker movable contacts open against the bias of charged mechanism springs. The hook is selectively actuated to release the contacts for abrupt closure under the urgence of the mechanism springs. An indicator is appropriately positioned under the joint control of the breaker mechanism and movable contacts to display the existing breaker condition.

Growing community of inventors

Burlington, CT, United States of America

Robert C Turton