Make the following paragraph simpler
The low-cost nature of the electrification meant that the branch could only support special two - or three-car trains -- the power supply was simply not strong enough to support full-size trains, and the short platforms on the branch line would not have been long enough to support eight-car trains.
However, because the electrification did not cost much, the branch was only able to have special two - or three-car trains running on it. This was because the power supply was not strong enough to support trains that had more cars.