FIELD: electricity.
SUBSTANCE: device includes switch (1), the first (2) and the second (3) current sensors, subtraction circuit (4), measurement circuit of rate of change of current difference (5), threshold device (6) and the first (7) and the second (8) electronic switches, solid-state relay (9) and inverter (10); at that, outputs of the first (2) and the second (3) current sensors are connected to inputs of subtraction circuit (4) the output of which is connected through measurement circuit of rate of change of current difference (5) to input of threshold device (6) the output of which is connected to inputs of the first (7), the second (8) electronic switches and inverter (10) the output of which is connected to control input of solid-state relay (9), the input of which is connected through the first (2) current sensor to output of the first (7) electronic switch, and output is the output of power transmission line.
EFFECT: enlarging functional capabilities.
1 dwg
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