Abstract: Multiphase switchgear for high voltages consisting in a number of components such as switches, transformers for measurement and protection, busbars and cable connecting means, said components being interconnected by coupling elements and said components and coupling elements being provided with connecting contacts, the spatial dispositions are standardized.

Abstract: Metal clad switchgear, comprising in one of the compartments of, or in a separate casing associated with its envelope system a movable voltage measuring transformer which is adapted to be adjusted in various positions, in one of which at least one of the high tension terminals of said transformer is connected to a conductor of the switchgear, in another one of which said terminal may be connected to earth and in still another one of which said terminal may be dead.

Abstract: A polyphase, e.g. three phase, isolator switch, of which the movable contact members of all phases extend through a common bushing insulator mounted in a partition between two compartments for rotation about an axis normal to said partition and are simultaneously moved to make and break the circuit by rotation of said insulator.

Abstract: In electric switchgear for high voltages a busbar system, of which each busbar consists of two identical rod-shaped conductors which are fastened by bolts to supporting insulators in specularly symmetric fashion.

Abstract: Monophase or polyphase circuit-breaker for high voltages, in which the switch work is or the switch works of all phases together are insulatedly accommodated in a closed metal casing and the two end contact holders of the or each switch work are connected through connecting members having the shape of coaxial hollow spherical caps which face each other with their edges to the connecting conductors of the circuit-breaker which extend insulatedly through the wall of the casing, said spherical cap-shaped connecting members forming at the same time potential gradient controlling shields.

Abstract: Metal clad switchgear for high voltages comprising monophase switchgear units, in each of which the circuit-breaker is accommodated in a spherical casing and each isolator connected to the circuit-breaker is provided in a substantially tubular casing which is attached to the casing of the circuit-breaker and has its longitudinal axis directed radially or substantially radially to the sphere of the circuit-breaker casing.

Abstract: An electric contact device provided with a composite annular contact member and a contact pin cooperating therewith. This contact member comprises a metal holder with a cavity and contained in the latter a circularly bent stack of V-folded contact plates and a stabilizing ring for said plates. Said ring extends through slots of all contact plates and said slots are formed in the narrower inwards extending parts of the contact plates. Said narrower plate parts are adapted to contact with their free contact edges the contact pin and the outwards extending broader parts of the contact plates are with their free contact edges in permanent contact with the holder.