9 Dec
1998
9 Dec
'98
9:04 a.m.
breakers on the substation. It also caused a cascade effect, tripping the Hunters Point and Potrero power plants.
grid primary power sources. Aside from the human error, the system worked "as designed to protect the rest of the grid."
I suggest that causing a cascade effect and increasing the area of an outage isn't a good way to design a system.