Communications: electrical – Condition responsive indicating system – With particular system function
Reexamination Certificate
2007-10-12
2008-12-30
Pope, Daryl C (Department: 2612)
Communications: electrical
Condition responsive indicating system
With particular system function
C340S003100, C340S870030, C340S870030
Reexamination Certificate
active
07471195
ABSTRACT:
An emergency power shutdown management system (EPSMS) comprises a programmable logic controller (PLC), relays coupled to the outputs of the PLC for shutting down electrically operated equipment, and indicators for indicating the status of the EPSMS and the controlled equipment. The PLC receives input signals from a fire control panel including a 2ndalarm signal which is generated after the fire control panel has detected smoke, fire or an explosion with two or more detectors and a system discharge signal which is generated when the fire control panel triggers fire sprinklers or the release of other fire or explosion suppression agents. The PLC also receives an emergency power off (EPO) signal from an EPO switch which is activated to immediately shut down all electrically operated equipment and power distribution units in a protected area. The indicators include a 2ndalarm indicator for indicating a 2ndalarm activation; a system discharge indicator for indicating a discharge of fire or explosion suppression agents; and an emergency power off indicator for indicating an emergency power off situation. The relays include 2ndalarm equipment relays coupled with a first set of equipment; system discharge relays coupled with a second set of equipment; and shunt trip relays coupled with a third set of equipment. All of the components of the EPSMS are housed within a single cabinet for consolidating the control and alert functions of the EPSMS in a single location.
REFERENCES:
patent: 6806446 (2004-10-01), Neale
Roark Christopher Dean
Zaboski James B.
Fike Corporation
Hovey & Williams, LLP
Pope Daryl C
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