VACUUM CIRCUIT BREAKER Russian patent published in 2010 - IPC H01H33/66 

FIELD: electricity.

SUBSTANCE: one drive - "on" - acts at common traction rod to the side directed to close contracts of vacuum arc-quenching chambers, and other drive - "off" - acts at common traction rod to the side directed to open contacts of vacuum arc-quenching chambers. At the moment of vacuum circuit breaker actuation, electromagnet drive (on or off) force acts at common traction rod, which may be quite high so that pulse current of actuation may be sent through according winding with a quite high value without risk of winding heating. High value of force as electromagnet drive actuates results in high value of mechanical acceleration of movable parts, causing less time of vacuum circuit breaker connection and disconnection. Unavailability of counteracting springs when using separate drives increases value of mechanical force applied as breaker actuates at mechanical movable system, which reduces time of mechanical movement of movable parts of mechanism and improves speed characteristics of vacuum circuit breaker as a whole.

EFFECT: reduced time of vacuum circuit breaker actuation, increased extent of poles disconnection synchronism and reduced dimensions of electric drive.

7 cl, 4 dwg, 1 ex