The incident happened on the Manayunk-Norristown line around 10:40 a.m. in the area of Ford Road and Washington Street in Norristown.
SEPTA officials say some overhead wires came down in that area and are on top of at least one train car.
About 30 passengers had to wait onboard while workers de-energized the wires.
The view from Chopper 6 HD showed the passengers disembarking the train at 11:30 a.m. and getting onto a waiting SEPTA bus.
There was no immediate word on what caused the wires to fall.
No injuries have been reported.