|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Surviving an Extended Power Outage after a Break Down in the Sub Station
||Till Reek, Roman Düssel
|On-Site Speaker (Planned)
TRIMET Aluminium SE operates the Essen aluminium smelter with 3 potlines in Germany. On April 12th 2016 a smoke alarm in the substation triggered an emergency shutdown of the whole plant. The smoke alarm was caused by a short circuit on a 21kV bus bar. While potline 2 and 3 could be restarted within 2 hours, the damaged bus bar had to be removed, separating potline 1 from the redundant high voltage power supply and fixing it on a single 220kV transformer. When potline 1 was to be restarted, the 220kV transformer was found to have a faulty insulation. An emergency bus bar replacement was welded in place and potline 1 could be re-energized after 5 hours 50 minutes. Due to immediate steps taken in the pot rooms, any pot loss could be prevented and the potline was operating normally 12 hours later.
||Planned: Light Metals