HIGH-VOLTAGE VACUUM SWITCH Russian patent published in 2004 - IPC

FIELD: electrical engineering; switching ac power circuits.

SUBSTANCE: proposed switch has arc-control chamber mounted in vertical insulating case built of two parts. Air is admitted through ventilation port into bottom part of case for cooling down heated current-carrying parts of switch so as to prevent their overheating and is discharged to bottom part of case through ports in top part of case wherein it is mixed up with cold air admitted through ventilation port. Air flows up over annular ventilation duct and cools down arc-control chamber and upper lead. Then air flows through ventilation ports to space formed by nozzle, cools down the radiator, and flows out of switch.

EFFECT: enhanced cooling efficiency, enlarged functional capabilities of switch at heavy currents.

11 cl, 3 dwg