Abstract: The invention relates to a control box with a box body which can be closed off by a door and a cooler with an inner circuit consisting of a ventilator and an evaporator, and an outer circuit consisting of a compressor, a condenser and a ventilator. An air-conditioning door which can easily by used for both types of operation is provided by a novel casing construction and an appropriate distribution of the modules of the inner and outer circuits of the cooler.

Abstract: A switching cabinet has a frame made of stays and with open sides that may be at least partially closed by wall elements that can be secured to the stays of the framework. In order to secure the wall elements to the framework in an manner invisible from the outside, projecting hook elements are fixed on the inner side of the wall elements, matching hook elements can be hooked into the projecting hook elements and the matching hook element can be mounted on the framework stays so that the hook elements may be hooked onto them.

Abstract: An apparatus for an electric connection between a printed circuit board inserted into a receiving channel of a guide rail and a module rail carrying the guide rails of a component rack is disclosed. A sliding bow contact is aligned parallel to the inner walls of the first receiving channel of a guide rail into which the peripheral region of a printed circuit board in which region is located a ground conductor path is inserted. The sliding bow contact is secured to the guide rail. The sliding bow contact has at least one contact tip and at least one contact lug which are in electrical communication with the module rail and a divider strip insertable into a second receiving channel in the module rail.