AN electrical issue caused trains to stop running on the Joondalup line during peak time on Monday morning.
Power was lost on the train line between Butler and Stirling stations just before 7.30am, later extending to Leederville station, and was not restored until about 9am.
Public Transport Authority spokesman David Hynes said the new Nowergup substation was not able to produce the necessary power and a circuit breaker, which turned off to protect the substation, did not switch back on again.
“We then had to manually reset it so we had to send someone from Perth up to Nowergup and that’s why it took so long to fix,” he said.
Mr Hynes said another part of the problem was that the Edgewater substation was offline for planned maintenance work.
“We had (the Edgewater substation) offline to do maintenance work there in the expectation that the new one at Nowergup would be able to take the load; as it turns out, it wasn’t and we’re looking into why that was the case,” he said.