Bletchleyite
Veteran Member
The 377/2 only stop to change over because the former Southern Driver Standards Manager didn’t trust his drivers to do it on the move, specifically raising and lowering the pantograph in the correct location. The MITRAC doesn’t need the train stationary to swap voltages; They are perfectly capable of doing it on the move, as their sister units do several times an hour, in the same place, on London Overground services. Occasionally an LO driver does forget to drop the pantograph, as the various marks on Westway bridge testify.
Interestingly they don't only stop, but they completely shut the train down - lights off, complete silence and everything, which sometimes alarms people who haven't used it before. The PIS then tends not to be reset so shows "Electrostar" for the rest of the journey.
I assume that too is unnecessary - if so, why is that being done?