Major disruption has affected Sydney's rail network after overhead wires came down onto a passenger train in Sydney's inner west on Friday evening.

The incident occurred at about 4:30pm as a South Coast Line service was travelling between Redfern and Erskineville. The falling wires came down onto the train, prompting authorities to isolate power and begin evacuating passengers.

Hundreds of passengers were assisted off affected trains as emergency and transport personnel worked to make the area safe.

Two other trains were also brought to a stop after the power supply was isolated. Passengers remained stranded while crews assessed the damage and worked on the affected infrastructure.

The incident caused major delays across Sydney's rail network, affecting commuters travelling through several parts of the city.

Transport authorities had to suspend or alter services while the damaged overhead equipment was dealt with. The loss of power meant trains could not continue operating normally through the affected section.

Passengers were advised to allow additional travel time and check service information before continuing their journeys.

The disruption occurred during the Friday afternoon and evening peak period, when large numbers of commuters were travelling home.

The incident also affected people travelling to events and other evening activities across Sydney, with alternative transport arrangements required on some routes.

Rail crews and transport authorities began working to remove the damaged wires and restore the power supply. Passenger safety remained the immediate priority while the affected trains were evacuated.

The cause of the overhead wire failure will be examined as part of the response to the incident.

Sydney's rail network relies heavily on overhead electrical infrastructure to power its passenger trains, meaning damage to the system can quickly affect multiple services.

The disruption demonstrates how an infrastructure failure at a single location can create delays across interconnected rail lines.

Passengers were encouraged to monitor official transport updates because service patterns could change while repairs and recovery operations continued.