2015 MRT disruptions
- This article refers to the MRT disruptions occurred on 7 July 2015 on the North South Line and East West Line cocurrently.
On 7 July 2015, train services were disrupted between 7.15 pm to 10.35 am throughout all 54 stations on the North South East West Lines affecting 250,000 commuters, making it the worst breakdown since it's operation in 1987. Up to now, SMRT and LTA are still finding out the root cause of the power trip on 7 July 2015.
|7 July 2015||17:59||1st power trip reported.|
|18:03||20 instances of power trips reported network wide.|
|Bus-Bridging on standby.|
|18:52||1st power trip cannot be reset. 5 trains had stalled since.|
|19:06||2 more power trip cannot be reset.|
|19:28||Free bus service activated.|
|19:34||All train service suspended.|
|21:00||East West Line resumes with degraded service.|
|22:35||North South Line resumes with degraded service.|
|8 July 2015|
|02:10||Free bus service creased.|
|05:30||North South East West Lines running as per normal with degraded service. North South Line may be suspended later in the day.|
|02:10||Free bus service activated.|
|10:33||No suspension on North South Line due to no incident report during the morning peak hour.|
|12:00||Free bus service creased.|
Possible Cause of Power Trips
LTA and SMRT identified three possible causes of power trips.
- A train was detected to have an arcing problem, but no evidence shown that it was the root cause.
- Two power insulators damage were detected along the North South Line.
- At Kranji Station's power station was detected to have "No Voltage Relay", problem has been rectified.
- Tanjong Pagar Station track detected water leakage near power supply, apparently damaged insulators. Insulators have been replaced.
- "Root cause of NSEW Line disruptions still not identified: LTA". Channel NewsAsia (9 Jul 2015). Retrieved 9 Jul 2015.
- "MRT breakdown: North-South, East-West lines down for hours". Today Online (7 Jul 2015). Retrieved 9 Jul 2015.
- "3 possible causes for Tuesday's train breakdown; investigations ongoing". The Straits Times (8 Jul 2015). Retrieved 9 Jul 2015.
- "Faulty train could have caused power trip: LTA on North-South, East-West line disruptions". Channel NewsAsia (7 Jul 2015). Retrieved 9 Jul 2015.