Siemens Aktiengesellschaft

Axel Preidel

Jörg Dorn

Mike Dommaschk

Joerg Dorn

Jörg Lang

Klaus Würflinger

Klaus Wuerflinger

Johann Holweg

Joerg Lang

An overvoltage arrester for high voltages having a high-voltage terminal that is connected to an arrester block forming a nonlinear resistor, and a temperature sensor for detecting the temperature of the arrester block. In order to enable a simple and reliable detection of the temperature of the arrester block continually during the operation thereof, the temperature sensor detects a change of the longitudinal extent of the arrester block.

Surge arrester for high voltages

An apparatus has power semiconductor modules, which are connected to one another via connection devices so as to form a series circuit. A short-circuiting device for short-circuiting the respective power semiconductor module is assigned to each power semiconductor module. The apparatus has a reliable and at the same time cost-effective short-circuiting device. It is proposed that the short-circuiting device is a pyrotechnical/mechanical element, which has a detonation charge and a tripping device, which can be displaced by the detonation charge.

Device for short-circuiting power semiconductor modules

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Buckenhof, Germany

Axel Preidel