Circuit interrupter with digital trip unit and...

Details Circuit interrupter with digital trip unit and... Circuit interrupter with digital trip unit and...

H - Electricity

02

H

348/26

H02H 3/08 (2006.01) H02H 1/00 (2006.01)

Patent

CA 1149923

66 49,001 ABSTRACT OF THE DISCLOSURE A circuit breaker includes a microprocessor- based trip unit having an optically coupled data input/ output system. A pulse transformer receives input pulses generated by the execution of instructions in said micro- computer and supplies these pulses to a plurality of opti- cal isolators, thereby reducing the power requirements of the optically isolated interface system to a value suffi- cient to allow complete operating power to be supplied to the trip unit and the data input/output system from the sensing current transformers within the circuit breaker housing.

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