Madrid Train Crash

[Green_Elite_Cab]

would the train need electric power to apply the brakes? Why not drop the pantographs? I figure the crew would have had to have realized that there was a curve coming up, unless they thought they could make it? would dropping the pantographs cause a major issue (assuming the train began to slow down and coast to safe level)?

I know there are special rules for raising and lowering pantographs.