SINGAPORE - A section of power cable that burnt through and a faulty circuit breaker along the Tuas West Extension were the primary cause of a massive disruption on Oct 14 that affected three MRT lines.
Of these, 6,500 commuters were on 12 stalled trains along the North-South and East-West Lines while 275 were on three stalled Circle Line trains.6.58pm: Concurrent faults along the Tuas West Extension cause a power outage. The burnt section of 22 kilovolt cables between Tuas Link station and Tuas West Road station had triggered a power fault, which activated circuit breakers nearby. But one failed to trip and isolate the power fault as designed due to a melted trip coil.
Train service was shut down between Woodlands and Jurong East stations on the North-South Line and between Queenstown and Gul Circle stations on the East-West Line. Operator SMRT subsequently decided to draw power from the Buona Vista substation, which supplies power to the CCL.
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