Abstract: A compartment module for a metal-enclosed, modular medium-voltage distribution system has an essentially box-type construction and includes a first set of mutually opposite completely closed walls, a second set of mutually opposite walls having identical large openings bounded by a narrow flange, and a third set of mutually opposite walls having small openings bounded by a wide flange. When assembled, a number of the modules can be arranged to face one another with similar walls and the remaining openings closed off by a cover. The modules can be mechanically coupled to each other by bolt joints or clamp joints in order to obtain a mechanical and electromagnetic seal. A method of manufacturing a module from sheet metal, and a method of manufacturing a medium-voltage distribution system from standard modules includes using isolators and busbar systems.

Abstract: Metal-encased modular medium-voltage distribution system with one or more sections constructed of compartmental modules having components of the distribution system and each section having at least one first busbar system for internal section connection including n phases, each of the phases extending substantially rectilinearly in a first direction (x). At least one second busbar system with n phases for external connection to other sections, each of the phases of the second busbar system extending essentially rectilinearly in a second direction (y) substantially perpendicular to the first direction (x).

Abstract: A three-phase isolating disconnector for use in a high-voltage switchgear arrangement in two gas-filled chambers, separated by a wall, in said arrangement, comprising for each phase a disconnector member extending through the wall and fastened and movable therein, this disconnector member being provided with a disconnector contact in each chamber, and comprising two fixed counter disconnector contacts which are connected to other parts of the switchgear arrangement and of which one is disposed in one chamber and the other in the other chamber. The movable disconnector member is brought by rotation from a first position, in which it conductively connects together the two fixed counter disconnector contacts, to a second position in which the conductive connection is broken and in which at least one disconnector contact of the movable disconnector member is connected to an earth contact, and vice versa.