From: 0f8503901d844703eea1acecb7a4938a_1938@example.com   
      
   replying to BIGEYE, FLedbetter wrote:   
   > tjke.gilmour wrote:   
   >   
   > We have had a catastrophic failure of an SF6 circuit breaker. This breaker   
   > was used as a synchronising breaker for a CHP on our 11kV system.   
   > Does anyone have or can point me to articles on failures (causes &   
   effects)   
   > of SF6 circuit breakers.   
   > TIA   
      
      
      
   I see several of these a  month across the US.I have many images and case   
   study's I can share.   
   The normal failure is not loss of gas but high contact resistance due to   
   contaminates that are generated in the chamber that will increase the   
   contact resistance thus creating heat that will damage springs and   
   contacts.   
      
   These poles can be reconditioned and this event can be avoided.   
   Typically these are only a few types and the same issue is seen over and   
   over again.   
   Let me know if you want to communicate further.   
      
   FL   
      
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   circuit-breaker-61533-.htm   
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