SWITCHING DEVICE FOR SWITCHING HIGH VOLTAGES FOR CABLE TESTING BY APPLYING HIGH VOLTAGE TO A CABLE SPECIMEN AND DISCHARGING THE CABLE SPECIMEN

摘要

The invention relates to switching devices for switching high voltages for cable testing by applying a high voltage to a cable test object and for discharging the cable test object, at least one device for switching a high voltage being connected to a negative high voltage source and at least one device of the same design for switching a high voltage being connected to a positive high voltage source are. These are characterized in particular by the fact that an increased voltage can be switched using a semiconductor switch. For this purpose, at least one electrically conductive heat sink with at least one printed circuit board with at least one semiconductor switch is arranged in an electrically insulated manner in a housing. The circuit board is a heat-conducting insulator between the semiconductor switch and the heat sink, which is flowed through and / or flowed through with a coolant. A conductor track is connected to a load connection of the semiconductor switch and a first voltage potential. Furthermore, an electrically conductive area of the housing is connected to a second voltage potential. A voltage divider with an intermediate voltage potential connected to the heat sink is connected between the voltage potentials.