http://www.abb.us/cawp/seitp202/238dd27d2a86be67c1257a30002effed.aspx (http://www.abb.us/cawp/seitp202/238dd27d2a86be67c1257a30002effed.aspx)i found this while lurking the net.massive voltage and wattage.
http://www.windpowerengineering.com/design/electrical/high-v-dc-circuit-breaker-solves-100-year-old-electrical-problem/ (http://www.windpowerengineering.com/design/electrical/high-v-dc-circuit-breaker-solves-100-year-old-electrical-problem/)another neat article.