If a powerline fails the connected power plant produces to much electricity? so it has to shut down, Other powerplants must compensate by generating more electricity, but the powerlines connected to those are over stimulated and heat up, to prevent dammage the cablas shut them self down, Now other power plant need to compensate that....
It's like a domino <img src="/ubbthreads/images/graemlins/badsmile2.gif" alt="" />
