The invention relates to an electrical apparatus designed to compensate the capacitive currents in electrical circuits with isolated neutral arising in single-phase earth faults, in particular to continuously-variable arc suppression coil. The technical result of the utility model is to increase the reliability of the magnetic gap regulating the quenching reactor by simplifying the design and providing a wear-resistant manitoprovoda mechanical transmission for smooth movement of the movable magnetic core. Quenching the reactor includes an actuator (6), a vertical shaft (10) provided with a threaded active portion, which includes a power coil (1), the magnetic circuit (2) with two cores (3, 4) forming a magnetic gap ( 5). One of the magnetic core is movable (3). The actuator is mounted on an active part of a separate housing (8). The vertical shaft is threaded with a continuous one-sided, it is rigidly connected to the movable core, and cooperates with the element forming with it ballscrews. The rigid connection of the movable core to the actuator is provided by a plate (12) and fastened by a connector (13) with an element embodied as a carriage (11) which moves along a vertical shaft and is part of the ball-screw transmission. 1 ZP f-ly, 1-yl.
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