ROGOWSKI COIL Russian patent published in 2009 - IPC G01R19/00 

FIELD: instrument making.

SUBSTANCE: present invention relates to electrical measurement techniques, particularly to measurement of alternating current. The Rogowski coil comprises a non-ferrous frame with a coil, containing n winding sections with flat spiral coils, arranged uniformly on the entire length of the Rogowski coil and connected in series. The winding sections with flat spiral coils are made in form of multilayer printed circuit boards and are located on the outer side of the non-ferrous frame in motherboard slots, which are fitted on the outer side of the non-ferrous frame. Also on at least one of the motherboards there are wires for serial connection of spiral coils of winding sections. The winding sections with spiral coils can be connected in series using wires, located on one of the motherboards by soldering. Wires on one of the motherboards, meant for serial connection of leads of spiral coils of the winding sections, can be made in form of conductor strips.

EFFECT: increased accuracy and wider range of measuring current using the Rogowski coil, with improvement of its manufacturability.

4 cl, 5 dwg