Investigation Report
Drillship Switchboard Arc Flash Damaged Dynamic Braking Unit
05-26-2017 05:30 G25174 GC 627 Incident > $25K / Required Muster
- BSEE
- Investigation Report
- Unknown
- Arc flashElectrical safetyFire
- Electrical workInspection and maintenance
- Switchgear
- Emergency responseEnergy and process isolationPermit to work
- Upstream oil and gas
- Vessel
Summary
BSEE investigates an arc flash in a drillship’s 690 V switchboard that damaged a dynamic braking unit and prompted personnel muster. The report traces deferred fuse replacement, carbon accumulation and escalating arcing, describes maintenance permit decisions and the fire-team response, and records that future blown fuses should be replaced immediately.
Classifications: Arc flash; arc fault; arc-flash.
Classifications: Electrical safety; electrical hazards.
Classifications: Fire; fire safety.
Classifications: Electrical work; electrical maintenance.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Switchgear; switch gear.
Classifications: Emergency response; emergency preparedness.
Classifications: Energy and process isolation; isolation; energy isolation.
Classifications: Permit to work; PTW; work permit.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Vessel; aboard ship; onboard vessel.