Circle Line disruption probe findings released
Posted: 22 June 2012 1553 hrs
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SINGAPORE: Faulty power cables caused the 20
September, 2011 Circle Line (CCL) disruption, which affected nearly 27,000
commuters.
In a statement, the Land Transport Authority (LTA) said it has
completed its investigations into the train service disruption.
LTA said the faulty power cables had affected traction power to the trains.
It said checks were conducted on all direct current (DC) cables at Dakota station.
It was found that the deterioration of the defective cable was made worse by the
presence of water in some cable pits.
LTA then instructed its contractor to replace the damaged cable at Dakota station and to conduct checks on all DC
cables that were installed for the CCL.
The checks uncovered three other cables at risk which have since been replaced by the contractor.
LTA said subsequent laboratory tests conducted revealed certain manufacturing
defects in some batches of these cables as well as damage in some cables
sustained during the installation process.
While these defects do not immediately impede the functioning of the cables or affect MRT operations, LTA
will embark on a planned cable replacement programme to change the defective
cables for greater MRT service reliability.
LTA said checks will be done every three months to identify if any cables have deteriorated and, if so, they
will be changed immediately.
The full completion of the replacement programme is targeted for end-December 2015, and the costs will be borne by the
contractor.
As LTA's findings show that SMRT is not at fault for the damaged cable, no penalty will be imposed on the operator for this
incident.
=> But does not SMRT have the responsibility to check the cables?
- CNA/wk
Posted: 22 June 2012 1553 hrs
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SINGAPORE: Faulty power cables caused the 20
September, 2011 Circle Line (CCL) disruption, which affected nearly 27,000
commuters.
In a statement, the Land Transport Authority (LTA) said it has
completed its investigations into the train service disruption.
LTA said the faulty power cables had affected traction power to the trains.
It said checks were conducted on all direct current (DC) cables at Dakota station.
It was found that the deterioration of the defective cable was made worse by the
presence of water in some cable pits.
LTA then instructed its contractor to replace the damaged cable at Dakota station and to conduct checks on all DC
cables that were installed for the CCL.
The checks uncovered three other cables at risk which have since been replaced by the contractor.
LTA said subsequent laboratory tests conducted revealed certain manufacturing
defects in some batches of these cables as well as damage in some cables
sustained during the installation process.
While these defects do not immediately impede the functioning of the cables or affect MRT operations, LTA
will embark on a planned cable replacement programme to change the defective
cables for greater MRT service reliability.
LTA said checks will be done every three months to identify if any cables have deteriorated and, if so, they
will be changed immediately.
The full completion of the replacement programme is targeted for end-December 2015, and the costs will be borne by the
contractor.
As LTA's findings show that SMRT is not at fault for the damaged cable, no penalty will be imposed on the operator for this
incident.
=> But does not SMRT have the responsibility to check the cables?
- CNA/wk
