HIGH- AND MEDIUM-VOLTAGE SWITCH OF HIGH DIELECTRIC STRENGTH INCORPORATING ARC-CONTROL CHAMBER Russian patent published in 2005 - IPC

FIELD: electrical engineering.

SUBSTANCE: proposed switch has movable contact, fixed contact, and arc-control chamber with external electrode and central electrode. External electrode is electrically connected to fixed contact. Chamber accommodates coil connected in series with external electrode and supplied with electric-arc discharge current to build up magnetic field and to move electric-arc discharge relative to motionless insulating gas. Central electrode is electrically connected to movable contact and passes through external electrode for shifting electric-arc discharge set up between these two electrodes. Electric field built up between these two electrodes is homogeneous to a great extent.

EFFECT: enhanced dielectric strength of switch; reduced probability of repeated initiation of electric-arc discharge.

7 cl, 3 dwg