Licht aus in Cambridge, MA. Grund: Die U-Bahn hat ein Reh im Tunnel überfahren. Wie kann das einen Effekt auf den Rest des Stroms haben?
War doch nicht die U-Bahn (Quelle: Boston.com)
NStar spokeswoman Caroline Pretyman said the blackout happened while the utility was conducting upgrades on a transmission line in Cambridge. While the work was being done, the main transmission line was taken out of service, and power was routed through a backup line.
NStar’s preliminary investigation showed that the second line lost power when a piece of equipment called a relay “incorrectly sensed an abnormality” in the electricity flow and shut the line down, Pretyman said. NStar restored power by disabling the faulty relay.