NETWORK FILTER Russian patent published in 2017 - IPC H02J3/01 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used for prevention of sudden changes in current in circuits with devices powered from an AC network, for prevention of long-term supply of excessive voltage in load circuit and total energy saving of active and reactive power. Network filter comprises included in gaps of each of linear wires of inductor coil with core and current filter inductance coil with core, provided with at least one additional winding. Between linear wires are connected a capacitor and at least two filtering-correcting circuits, input of each of which is connected to output of one of additional windings. Network filter additionally comprises connected in series between linear wires magnetising coil and ballast inductor with core, threshold device, connected at input between linear wires, electronic switching device, connected between one of the linear wires and connecting point of magnetising coil and ballast inductance. Output of threshold device is connected with electronic switching device, magnetising coil is installed on at least one of cores of inductance coils.

EFFECT: technical result of present invention is aimed at using energy, which increases in load current to reduce total component of current passing in load and reduction of current, supplied to load from network, to control allowable limit of reduction of voltage in load at technical characteristics and, consequently, to saving electric energy consumed by load.

1 cl, 1 dwg