Abstract: A switching chamber insulation arrangement and a circuit breaker having such a switching chamber insulation arrangement are provided. The switching chamber insulation arrangement provides improved heat dissipation in the area of the contact areas of switch contact poles. The switching chamber insulation arrangement includes a strut arrangement having a plurality of struts. Each strut has a first foot area, a second foot, area and a center area which is located between the first foot area and the second foot area, respectively. The struts are arranged along a circumference around a longitudinal extent axis of the strut arrangement. The strut arrangement has a first mechanical coupling area on a side of the first foot areas for coupling to a first pole of a circuit breaker, and a second mechanical coupling area on a side of the second foot areas for coupling to a second pole of a circuit breaker.

Abstract: A high-voltage disconnector includes first and second contact elements movable along a disconnecting axis with first and second latching elements fixed thereto, respectively, a drive system for moving the first contact element in an opening direction along the axis to open the disconnector, and a restoring system for restoring the second contact element counter to the opening direction. With the disconnector closed, the first and second latching elements are arranged in a latched connection with one another. During an initial phase of the movement of the first contact element in the opening direction the latched connection initially remains, and the second contact element is carried along by the first contact element in the opening direction. During a disconnecting phase, the latched connection is released, the second element is restored by the restoring system counter to the opening direction, and the second contact element is disconnected from the first contact element.

Abstract: A switching chamber insulation arrangement and a circuit breaker having such a switching chamber insulation arrangement are provided. The switching chamber insulation arrangement provides improved heat dissipation in the area of the contact areas of switch contact poles. The switching chamber insulation arrangement includes a strut arrangement having a plurality of struts. Each strut has a first foot area, a second foot, area and a center area which is located between the first foot area and the second foot area, respectively. The struts are arranged along a circumference around a longitudinal extent axis of the strut arrangement. The strut arrangement has a first mechanical coupling area on a side of the first foot areas for coupling to a first pole of a circuit breaker, and a second mechanical coupling area on a side of the second foot areas for coupling to a second pole of a circuit breaker.