UPS failure causes partial blackout – DP undesired event


One of the fans in UPS No 1 failed causing the UPS to overheat and shut down.

The fan has been replaced and the temperature alarm tested.

Considerations from the above event:

  • The failure of UPS No 1 and subsequent failure of the other equipment should have resulted in a DP yellow alert.
  • With redundancy compromised the vessel needed to consider a move further away from the installation and out of the 500m zone.
  • Fans, filters and alarms should be adequately covered at component and sub system level by the vessel planned maintenance system.