Siemens has developed two new compact vacuum circuit breakers for rated voltages of 12 kV and 24 kV.

VACUUM CIRCUIT BREAKER WITH stored energy mechanism The main feature of the CVB is its stored energy mechanism for fast, positive closing action. The energy necessary to move the main contacts is ...

When the breaker maintenance procedure says "inspect contacts," do more than just verify their presence. Before examining the breaker contacts, inspect the breaker cubicle. If the breaker operated ...

ABB has released the 38 kV R-MAG outdoor vacuum circuit breaker. First introduced in 2002 for 15 kV and 27 kV applications, the R-MAG breaker uses a magnetic actuator design that has only one moving ...