Patent ID: 9373962
Filing Date: 2016-06-21
CPC Classification: G05B,H02J,Y02B,Y02E,Y02P,Y04S

Claim Text:
1. A multiple uninterruptible power supply (“UPS”) system, comprising: a. a plurality of UPS subsystems with a separate UPS data communications bus coupling a controller of each UPS subsystem to an associated controller of an associated tie cabinet; b. a data communications tie bus that couples the controllers of the tie cabinets to each other; c. wherein the controller of each tie cabinet monitors the UPS data communications bus to which it is coupled and the data communications tie bus for qualified power line based coordinating signals and passes through a qualified power line based coordinating signal it first receives from either the UPS data communications bus to which it is coupled or the data communications tie bus to the other of the UPS data communications bus to which it is coupled or the data communications tie bus and does not pass a power line based coordinating signal from the other bus to the bus from which that controller first received the qualified power line based coordinating signal as long as that controller continues to receive qualified power line based coordinating signals from the bus from which that controller first received the qualified power line based coordinating signal; wherein when the controller of any tie cabinet that has been receiving qualified power line based coordinating signals from the UPS data communications bus to which it is coupled detects that it is no longer receiving qualified power line coordinating signals from that UPS data communications bus, the controller of that tie cabinet ceases passing through the power line based coordinating signals from that UPS data communications bus to the data communications tie bus and starts monitoring that UPS data communications bus and the data communications tie bus for qualified power line based coordinating signals; and each UPS data communications bus including a primary channel and a redundant channel and the data communications tie bus including a primary channel and a redundant channel wherein the controller for each tie cabinet monitors for faults the primary and redundant channels of the UPS data communications bus to which it is coupled and the primary and redundant channels of the data communications tie bus and that controller determining that there is a fault on the primary channel of one of the UPS data communications bus to which it is coupled and the data communications tie bus when that controller is not receiving qualified power line based coordinating signals from the primary channel of that bus and is receiving qualified power line based coordinating signals from the redundant channel of that bus, and that controller is not receiving qualified power line based coordinating signals from either the primary channel or the redundant channel of the other bus and that controller determining that there is a fault on the redundant channel of one of the UPS data communications bus to which it is coupled and the data communications tie bus when that controller is not receiving qualified power line based coordinating signals from the redundant channel of that bus and is receiving qualified power line based coordinating signals from the primary channel of that bus, and that controller is not receiving qualified power line based coordinating signals from either the primary channel or the redundant channel of the other bus.