From: arl_123234@hotmail.com   
      
   On 11/20/2013 07:23 PM, Don Kelly wrote:   
   > You may find that the surge arrestor is not necessarily mounted on the   
   > transformer but is a separate unit near it (typically looks like an   
   > insulator between the fuse and the transformer but there will be a lead   
   > to ground (probably to the ground on the transformer).   
      
   Thanks for the informative reply, Don.  I looked again and all I can   
   observe between the transformer HV (primary) terminal and the MV feeder   
   is the usual series combination of a manual-reset cutout and a fuse.   
   Also, the replacement transformers, unlike those they replaced, have a   
   (plastic?) shroud that covers about half the length of the transformer's   
   HV terminal insulator.   
      
   The surge arrester's principal function is to protect against lightning   
   strikes (or perhaps induced potential from unusual sunspot/auroral   
   activity) so I suppose it could be left out without undue risk for power   
   outages and equipment damage.  Or perhaps the replacement units are more   
   robust and don't require an arrester.  Sincerely,   
      
   --   
   J. B. Wood	            e-mail: arl_123234@hotmail.com   
      
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