SELF-OSCILLATING ARC-CONTROL DEVICE OF HIGH- VOLTAGE CIRCUIT BREAKER Russian patent published in 2002 - IPC

FIELD: high-voltage circuit-opening devices including circuit breakers operating under normal and abnormal conditions. SUBSTANCE: arc-control device has case, fixed contact, hollow movable contact, and blowout coil. Case may be made of insulating material or metal. Insulating case is distinguished by improved surface insulating characteristics and metal case is grounded and incorporates provision for reducing concentrated impact of exhaust gases on its inner surfaces thereby reducing hot-gas sparkover. Hollow contact is placed inside case and accommodates gas splitter. Proposed arc-control device provides for cooling exhaust gases and treating gas medium to make it ready for next switching operations. EFFECT: improved characteristics of arc-control device. 4 cl, 1 dwg