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High current, high voltage DC switching

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  • Author: Dr. Shun Yu, Claas Rosenkoetter, Robert Hoffmann, Dr. Frank Werner
An increasing number of DC applications, such as battery charge and discharge systems, renewable energy storage etc. require adequate and powerful DC switches. In contrast to AC switching, where zero-crossing of voltage and current facilitates quenching and in some cases prevents arcing, only the high power switch can extinguish the arc generated by a DC source. The power dissipated inside the switch due to arcing is the most significant parameter that determines service life and reliability of the switch. The following paper describes a new gas-filled contactor with excellent arc quenching capabilities, thus increasing performance and service life.
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