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What is main cause problem to damage trmination cable inside 22 kV Tra

What is main cause problem to damage trmination cable inside 22 kV Tra

What is main cause problem to damage trmination cable inside 22 kV Tra

(OP)
         
Could anyone to help me.

During maintenance after ennergize 1 year in TR 34 MVA,11kV/22kV in side 22kV box
 
We found that The red insulation of cable was damaged (Crack in outer sheet) and burnt at several position (see as attachment). The reason is electic discharge or not??

How to solve this problem for long term solution

RE: What is main cause problem to damage trmination cable inside 22 kV Tra

No photo...?
  

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