Display apparatus for a first out type of fault status...

Details Display apparatus for a first out type of fault status... Display apparatus for a first out type of fault status...

H - Electricity

01

H

H01H 9/16 (2006.01) F23N 5/24 (2006.01) G08B 25/14 (2006.01)

Patent

CA 2133098

2133098 9324912 PCTABS00028 An annunciator for the status of interlock switches connected into a series circuit for supplying power from a power source to a load, includes a memory recording the status of each switch at a selectable instant. A plurality of display elements are arranged in a pattern corresponding to the pattern of the interlock switch circuit. A manually operable switch allows a user to select for graphically showing with the display either the switch status recorded by the memory or the current status of the switches. The signals controlling the display are conditioned so that the particular display element assigned to the first out switch as recorded in the memory flashes to indicate the switch closest to the power source which was not conducting at the selectable instant.

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