CURRENT LIMITER Russian patent published in 2005 - IPC

FIELD: electrical engineering; short-circuit protective gear.

SUBSTANCE: proposed short-circuit current limiter built around controlled reactor has at least one pair of separate magnetic cores carrying magnetizing and demagnetizing windings. This pair of magnetic cores carries main winding designed for connection to phase line under protection and auxiliary winding. Main and auxiliary windings are made in the form of series-connected semi-windings disposed on separate magnetic cores of pair. Magnetizing winding is designed for connection to dc current supply. Semi-windings of main winding are connected differentially and those of auxiliary winding, cumulatively; they pass current to rectifier connected via threshold switch to demagnetizing winding.

EFFECT: enhanced speed of response and short-circuit current limiting efficiency.

3 cl, 2 dwg