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   sci.electronics.repair      Fixing electronic equipment      124,925 messages   

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   Message 123,777 of 124,925   
   Jeroni Paul to Carlos E.R.   
   Re: Ground fault switch aka residual-cur   
   08 Aug 23 02:48:43   
   
   From: JERONI.PAUL@terra.es   
      
   Carlos E.R. wrote:   
   > If I were inside the house, I would disable the auto arming.   
      
   Sure one day you will forget to disable the rearming.   
      
   > Of course,   
   > if the fail condition remains active, it does not rearm. It is the same   
   > strategy as a person does: the thing triggers, we go to the panel and   
   > try to arm it, maybe several times.   
      
   The only way to know if the condition remains is to reapply power, so it   
   should rearm and trip again. Not sure if it will be so fast tripping as it was   
   the first time. If the leak was you on the bath this is not a good idea.   
      
   > There was a period, the first year, when they happened every day at a   
   > precise time, 6:30 AM I think it was. Investigating, the electrician   
   > found out that the substation switched the main transformer up or down a   
   > notch at that time.   
   >   
   > What he found then was that there was a lamp that was connected to one   
   > current limiter on (L) and to another for the (N) line. That was   
   > corrected and the regular triggers disappeared. There remained spurious   
   > triggers, like once a year, which tend to happen when one is travelling   
   > far (Murphy)   
      
   Asymetric wiring is a good way to trigger the newer super-fast protectors. I   
   know of some cases of false-trigger, they are hard to diagnose because it   
   happens once a year. There are various opinions on the cause.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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