UPS failure causes partial blackout
- DP Event
- Published on 29 March 2017
- Generated on 9 May 2025
- DPE 01/17
- 1 minute read
Undesired event
The failure of UPS No.1 and subsequent failure of the other equipment should have resulted in a DP yellow alert.
Comments
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
- 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.
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The case studies and observations above have been compiled from information received by IMCA. All vessel, client, and operational data has been removed from the narrative to ensure anonymity. Case studies are not intended as guidance on the safe conduct of operations, but rather to assist vessel managers, DP operators, and technical crew.
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