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AssigneeG & W Electric Company
InventorsRobert J. Westphal, Blair S. Kerr, Jason M. Knott
Estimating the term…
Methods and systems for redundant relay systems for use with switchgears. One example system includes a switch module including a switching device therein, a coil circuit operatively coupled to the switch module to control a position of the switching device, a switchgear relay circuit, and a back-up trip circuit. The back-up trip circuit includes a polarity control device, a changeover device, and an electronic processor. The electronic processor is configured to monitor for a loss of power to the switchgear relay circuit or for a switchgear relay failure, and in response to detecting either of the loss of power or the switchgear relay failure, operate the switch module by actuating the changeover device to disconnect the coil circuit from the switchgear relay circuit and connect the coil circuit to the polarity control device of the back-up trip circuit.
A switchgear system comprising:
A back-up trip circuit for a switchgear relay circuit of a switchgear system, the back-up trip circuit comprising:
A method for operating a back-up trip circuit for a switchgear relay circuit of a switchgear system, the back-up trip circuit including a polarity control device and a changeover device, the method comprising:
A non-transitory, computer-readable medium, comprising commands which, when executed by a computer, cause the computer to control a back-up trip circuit for a switchgear relay circuit of a switchgear system, the back-up trip circuit including a polarity control device and a changeover device, by:
Dependencies are inferred from the claim text.