Switching Device for Switching High Voltages for Cable Testing via the Application of High Voltage to a Test Cable and Discharge of the Test Cable

摘要

Switching devices for switching high voltages for cable testing by applying high voltage to a cable test sample and for discharging the cable test sample, wherein at least one device for switching a high voltage is connected to a negative high voltage source, and at least one identically embodied device for switching a high voltage is connected to a positive high voltage source. Said switching devices are distinguished in particular in that an increased voltage can be switched with a semiconductor switch. For this purpose, at least one electrically conductive heat sink having at least one printed circuit board with at least one semiconductor switch is arranged in an electrically insulated manner in a housing. The printed circuit board is a thermally conductive insulator between the semiconductor switch and the heat sink, to which and/or through which flows a coolant.