Electrical contact arrangement for vacuum interrupter arrangement

A medium-voltage circuit breaker including at least one pole part operated by an electromagnetic actuator as a switch operator comprising:

• a cylindrically shaped insulating part;
• a pair of electrical contact parts are coaxially arranged within the insulating part and are concentrically surrounded by the insulating part, the electrical contact parts arranged to initiate a disconnection arc only between corresponding inner contact elements after starting a disconnection process, and corresponding outer contact elements arranged to commutate the arc from the inner contact elements to the outer contact elements until the disconnection process is complete, wherein each inner contact element is a TMF-like contact element for generating mainly a transverse magnetic field, and each outer contact element is an AMF-like contact element for generating mainly an axial magnetic field,
• wherein,
• the outer AMF-like contact element is made as a first part designed as a thin pot-shaped slotted piece in order to create an AMF-field by inversing a slits direction at a bottom contact, and a second part designed as a hollow disk constituting a surface of the outer contact element which is in touch with the plasma arc.