Abstract: The invention relates to a system and a method for assembly and maintenance of connection modules (3) in high-voltage switchgear (1). According to the invention assembly and maintenance are performed in a service bay (6) in the vicinity of the switchgear. Modules (3a) to be assembled, replaced or repaired are transported between the service bay (6) and its site (2a) in the switchgear area by a service vehicle (4). The vehicle (4), connection modules (3) and the positions for their base plates (2) are thus so adapted to each other that the service vehicle (4) can move about in the switchgear area while the switchgear is in operation. A special aspect of the invention is the custom-design of the service vehicle (4) specifically for its purpose.

Abstract: A truck mounted breaker for high voltage lines. The breaker is a kind in which a linear displaceable contact device, including a plurality of units, coacts with a stationary countercontact device which includes a corresponding number of countercontact units. The breaker is intended for high voltage lines. All countercontact units are supported by a stand common to the units. The stand also supports the linear displaceable contact device. This arrangement ensures correct alignment of all pairs of contact and countercontact units.