Circuit interrupter with digital trip unit and power supply

Details Circuit interrupter with digital trip unit and power supply Circuit interrupter with digital trip unit and power supply

H - Electricity

02

H

348/26

H02H 3/08 (2006.01) H02H 1/06 (2006.01)

Patent

CA 1154527

68 49,010 ABSTRACT OF THE DISCLOSURE A circuit breaker includes a microprocessor- based trip unit and a power supply for supplying operating power to the trip unit and the trip coil of the circuit breaker from either the internal current transformers of the circuit breaker or a plurality of external sources. The trip unit includes a numeric display for displaying a sequential series of parameter values under normal condi- tions. Under low-power conditions, the power supply provides pulses of operating power sufficient to enable the trip unit to execute all of its limit check functions and present a flashing display of a single parameter value.

374792

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