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US 6,426,634 B1Granted
Circuit breaker with integrated self-test enhancements
AssigneeGeorge A. Spencer
InventorsRobert Henry Clunn, LeRoy Blanton
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AssigneeGeorge A. Spencer
InventorsRobert Henry Clunn, LeRoy Blanton
Estimating the term…
A circuit switching device or circuit breaker with integrated self-test enhancements is disclosed having separable contacts operable under processor control to control power to a circuit responsive to at least one of a plurality of fault conditions and operable according to a method for testing, including the steps of: controlling the switching device during a sampling cycle, to input one or more operating parameters sensed in the circuit to an A/D converter for measurement wherein the operating parameters enable detection of the fault conditions; determining whether to read a select one of the operating parameters from an output of the A/D converter into a first memory; and reading pre-determined parameter values from a second memory into the first memory during the sampling cycle instead of the operating parameters read from the A/D converter if a self-test has been invoked during the sampling cycle.
Apparatus for testing a circuit switching device, having separable contacts for controlling AC power supplied to a circuit responsive to at least one of a plurality of fault conditions, wherein the AC power provides an alternating line current having a line voltage and a frequency comprising:
A method for testing a circuit switching device having separable, contacts and is operable under processor control to control AC power to a circuit in response to at least one of a plurality of fault conditions, wherein the AC power provides an alternating line current having a line voltage and a frequency comprising the steps of:
Dependencies are inferred from the claim text.