Transfer switch system with subnetwork

Details Transfer switch system with subnetwork Transfer switch system with subnetwork

H - Electricity

02

J

H02J 9/00 (2006.01) H02J 3/14 (2006.01) H02J 9/06 (2006.01)

Patent

CA 2182837

A transfer switch system includes a controller which sends separately timed restart signals over a communications network to an addressable relay associated with each load in order to sequentially restart the loads following a transfer. When the loads are elevators, the controller sends a prepare to transfer signal to each elevator through the associated addressable relay directing the elevator to park at a floor with its doors open and delays making a discretionary transfer until all elevators send a reply message over the network that they are appropriately parked. A message from the utility directing a reduction in use of their power can be sent to the controller over the communications network through an additional remote station. The controller can then transfer to the alternate power source and/or send messages to selected loads to shut down.

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