AUTOMATIC RECLOSING DEVICE Russian patent published in 2019 - IPC H02H3/06 

FIELD: electrical engineering.

SUBSTANCE: automatic reclosure device comprises a high-frequency current source, first, second and third converters, a frequency divider, first and second switches, first and second comparators, first and second reference voltage sources, first and second D-flip-flops, first and second logic circuits 2AND, first and second delay circuits, terminals "Input", "Output" and "Common". "Input" terminal, the first converter, the third converter, closed fixed and movable contacts of the first commutator, and the "Output" terminal are connected in series. Second converter is connected to the fixed open contact of the first switchboard and the "Common" terminal on the other side. Information output of the first and second converters is connected to the first input of the first and second comparators, respectively, the second input of each of which is connected to the first and second reference voltage sources. Output of the first comparator is connected to the input of the first D-flip-flop and through the first delay circuit to the input of the second D flip-flop. Output of the first and second D-flip-flops is connected to the control input of the first and second switches, respectively. High-frequency current source is connected through the second switchboard to the "Output" terminal. Output of the third converter through the frequency divider is connected to the first inputs of the first and second logic circuits 2AND, the outputs of which are connected to the zero setting inputs of the first and second D-triggers, respectively. Output of the second comparator is connected to the second input of the second logic element 2AND and through the second delay circuit is connected to the second input of the first logic element 2AND.

EFFECT: high sensitivity of the device with automatic reclosure after self-elimination of short circuit and reduced weight and dimensions.

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