Well maintenance would have helped, but having 220kv cross over 110kv bus bar is not a good idea for this very reason. Also the single breaker double buss topology because one bus is in such close proximity to the other during any contingency, good chance both will go at the same time.
Reading further I heard they added a new GIS next to the station so anything happening to the open air portion would have less effect.
Last edited by Mbrooke; 11/07/16 07:04 PM.
