FILTER OF REVERSE SEQUENCE CURRENT ON MAGNETICALLY OPERATED SEALED SWITCHES FOR ELECTRIC PLANTS WITH HORIZONTALLY ARRANGED CURRENT CONDUCTORS Russian patent published in 2010 - IPC H02H3/08 

FIELD: electricity.

SUBSTANCE: application: in the field of electrical engineering. Filter comprises the first, second windings, and control resistor, which is serially connected to the first winding, and also the first, second magnetically operated sealed switches, amplifier, phase-turn circuit and actuator, besides the first winding is wound onto the first magnetically operated sealed switch, the second one - on the second magnetically operated sealed switch, amplifier is connected by it input to winding of the second magnetically operated sealed switch, executive body is connected by it input to winding of the first magnetically operated sealed switch, input of phase-turn circuit is connected to output of amplifier, winding of the first magnetically operated sealed switch with control resistor - to output of phase-turn circuit, and magnetically operated sealed switches with windings are fixed so that centre of gravity of the first one matches point with coordinates h₁=1.155d, x₁=0 and , of the second one - to point with coordinates h₂=1.155d, x₂=2d and , where h₁, h₂, h is distance in vertical plane from horizontal line passing through centres of gravity of magnetically operated sealed switches to current conductors, γ₁ (γ₂) is angle between horizontal line and longitudinal axis of magnetically operated sealed switch, x₁ (x₂) is distance from centre of gravity of magnetically operated sealed switch to vertical line passing through centre of current conductor of phase A, d is distance between conductors of neighboring phases.

EFFECT: expanded field of application and improved sensitivity of filter.

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