Basis for Recommendation
The reason for the presence of Cupric Oxide could not be determined during this investigation; as such, the RAIU make the following safety recommendation:
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| Ref # | 202106-05 |
|---|---|
| Status | Open / In progress |
| Occurrence | Luas Overhead Line Failure, Stillorgan, 2nd November 2020 |
| Occurrence Date | 02 November 2020 |
Recommendation
Transdev should investigate the reason for the build-up of Cupric Oxide on the Overhead Contact System (OCS) wire. The investigation should include but not limited to:
• Impact of longer trams, and congestion of trams in electrical sections;
• Electrical resistance monitoring of tram to identify if high current demand is an issue;
• Consequence of trams working in degraded mode on current demand;
• The pantograph carbon bands and OCS interface.