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BRANCH CIRCUIT EMERGENCY LIGHTING TRANSFER SWITCH UTILIZING RELAY CONTROLS AND SAFETY RELAY FOR LOAD POWER CONTROL
BRANCH CIRCUIT EMERGENCY LIGHTING TRANSFER SWITCH UTILIZING RELAY CONTROLS AND SAFETY RELAY FOR LOAD POWER CONTROL
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机译:分支电路应急照明转移开关利用继电器控制和负载负载控制的安全继电器
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摘要
A device, system and method for sequenced switching of a transfer switch. The method includes receiving a first monitoring signal indicating either one of an actuation of a fire alarm system or a first change of state in a primary power source from an on state to an off state. The method includes opening a first control relay connected to the primary power source and a second control relay connected to the secondary power source. The method further includes switching a safety relay from a first connection to the primary power source to a second connection to the secondary power source. The method further includes closing the first and second control relays so that the secondary power source energizes the lighting load.
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