Abstract: A breaker combination, for use in bus bar installations for connecting at least one bus bar with at least one branch, includes an encapsulating tube and a rotatable switching tube axially disposed in the tube. Stationary counter-contacts arranged on the inner periphery of the tube, are connected with a bus bar or a branch. The switching tube carries external contact studs for making electrical connection with the counter-contacts which also are connected to the poles of a power circuit breaker lying inside the switching tube. This integrated construction provides an especially compact arrangement and simplified locking between the drives for the power circuit breaker and for the isolating or switching contacts.