Circuit interrupter with multiple display and parameter...

Details Circuit interrupter with multiple display and parameter... Circuit interrupter with multiple display and parameter...

H - Electricity

02

H

348/26

H02H 3/08 (2006.01) H02H 3/04 (2006.01)

Patent

CA 1149919

49,013 ABSTRACT OF THE DISCLOSURE A circuit interrupter includes a microcomputer- based trip unit, and a display and control panel compris- ing a numeric display device and a plurality of legends associated with light-emitting diodes. The trip unit pre- sents a sequential display of numeric values of associated circuit electrical parameters and time-current trip char- acteristic setting values, with the. currently visible numeric quantity being identified by an energized light emitting diode and associated legend. The control panel also includes a test switch for initiating a test opera- tion and a potentiometer for selecting a desired simulated fault current value for the test operation. The test capability is provided simultaneously with normal circuit breaker operation which maintains full protection of the associated circuit. A short-delay feature is provided having a selectable i2t characteristic with adjustment of both pick-up and time parameters.

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