Abstract: A rapid electrical connection system is made up of a mounting plate for securing form-coded flat cables, an intermediate carrier serving as a power socket and a device adapter which can be swiveled on, in particular a load feeder capable of communication, as the main components. The flat cable for the power connection and the flat cables for signal transmission and backup power supply, are all contacted by penetrative contacting. The electrical connection of the device adapter takes place during the swiveling-on action.

Abstract: In order to improve a plug insert for a metal tube housing comprising a cact carrier with plug pins protruding from a first side thereof and solder terminals from a second side thereof opposite the first side, and a protective sleeve insertable in the metal tube so as to surround the contact carrier, with the protective sleeve extending with its front side from the first side of the contact carrier in a first direction parallel to the plug pins at least as far as one end thereof and forming in a second direction opposite the first direction a protective collar protruding beyond the second side of the plug element, such that it is also usable for high insulation voltages, in particular insulation voltages of 250 V and more, it is proposed that the protective sleeve and the contact carrier be two parts which can be put together, that the protective sleeve have a receiving means for insertion and fixing of the contact carrier therein, and that the protective collar protrude in the second direction beyond the sol