Anyone from the DC area hear something about this? I work for a firm in Washington, and a colleague of mine was telling me he spoke with some guys he met while out on a job from the local utility involved with an investigation into what happened. A structural failure at the 230kV level is apparently what initiated the fault, something must have fallen on the transmission line, but log files show that the protective relays did not clear the fault for nearly 40 seconds. This caused everyone else's protection to kick-in, removing them from the grid, which is why power outages were seen nearly 50 miles away.

A perfect example in the importance of proper device coordination and testing your relays on a regular basis if you ask me. Thoughts on this?

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