"What bothered me about the article was that nowhere does it explain how you can make a DC breaker that can actually disconnect at those voltages." This is a l

"What bothered me about the article was that nowhere does it explain how you can make a DC breaker that can actually disconnect at those voltages." This is a long ago solved problem for AC and DC: http://en.wikipedia.org/wiki/Sulfur_hexafluoride http://en.wikipedia.org/wiki/Sulfur_hexafluoride (Look at the "Applications") It it more expensive but totally worth it for high voltage lines.