AUTOMATIC SWITCHING DEVICE OF ELECTRIC POWER SUPPLIES Russian patent published in 2012 - IPC H02J9/04 

FIELD: electricity.

SUBSTANCE: automatic switching device of electric power supplies includes the first and the second electric contactors, each of which is connected to output of the corresponding control module; contacts of the first electric contactor are connected between the first feeder and bus of guaranteed electric power supply to consumers, and contacts of the second electric contactor are connected between the second feeder and bus of guaranteed electric power supply to consumers; the first and the second measuring modules of voltage parameters of the first and the second feeders respectively; the first, the second and alternative processors, additional measuring modules of voltage parameters of the first and the second feeders and three measuring modules of voltage parameters on bus of guaranteed electric power supply to consumers are introduced; at that, outputs of the first and the second measuring modules of voltage parameters are connected to the first and the second processors, outputs of additional measuring modules of voltage parameters of the first and the second feeders are connected to alternative processor, outputs of measuring modules of voltage parameters on bus of guaranteed electric power supply to consumers are connected to the first, the second and alternative processors respectively; checking contacts of the first and the second electric contactors are connected to the first and the second processors; all processors are connected to data bus intended for exchange of information on measured voltage parameters of feeders and bus of guaranteed electric power supply to consumers, as well as on diagnostics results of processor operation, the first outputs of the first and alternative processors are connected to the first and the second inputs of control module of the first electric contactor, the third input of which is connected to the second output of the second processor, and the first output of the second processor and the second output of alternative processors are connected to the first and the second inputs of control module of the second electric contactor, the third input of which is connected to the second output of the first processor.

EFFECT: improving reliability of electric power supply to consumers owing to reserving individual software-and-hardware assemblies and enlarging functional capabilities of the device owing to checking the quality properties of electric power in guaranteed power supply buses.

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