Research on electric-arcing and burning on track insulation joints at entrance/exit tracks of urban rail transit vehicle depots
The track insulation joints at the entrance and exit tracks of urban rail transit vehicle depots suffer from electric-arcing and burning,seriously increasing the safety risks to vehicle operation,which is a common and important issue that needs to be solved for the industry.The article is based on the actual case of track insulation joints being electric-arcing and burned at the entrance and exit tracks of urban rail transit vehicle depots.From the perspectives of system design and components,multiple factors across multi-disciplines are analyzed.It is known that imperfect system design leads to fixed voltage deviations at both insulation joint ends of the track,and insulation components break down and transport currents due to poor insulation performance and voltage deviation at both ends of the track insulation joints,resulting in arcing and heating.On the other hand,due to the poor flame-retardant performances of the insulation components,the track insulation joints may be burnt.The article achieves the purpose of fault tracing and proposes improvement suggestions through testing and verification on actual working conditions,including interim schemes for operating-lines and long-term research improvement directions for newly built lines,which provides support and ideas for various combined specialty operation and maintenance management in rail transit and system reliability design.
urban rail transitinsulation jointelectric-arcing and burningstray currentdepotentrance/exit track
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