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   sci.electronics.basics      Elementary questions about electronics      72,318 messages   

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   Message 71,794 of 72,318   
   George Herold to default   
   Re: how to reduce the mains voltage   
   13 Jul 20 08:47:27   
   
   From: gherold@teachspin.com   
      
   On Monday, July 13, 2020 at 11:31:34 AM UTC-4, default wrote:   
   > I have an older window air conditioner that I'd like to hang on to for   
   > a few more years.  The name plate says it is 220 VAC and since the   
   > power company went through and upgraded the distribution network and   
   > replaced HT and transformers my service which had been running 210-220   
   > volts is now a steady 250 volts and my bill is up ~15%.   
   >   
   > The increased consumption is tied to how much I run the AC and since   
   > the upgrade I've already had to replace both the compressor and fan   
   > motor run caps.  The compressor one died a quiet death, and the fan   
   > cap melted and smoked. The compressor cap went out the week they   
   > changed the transformer and the fan cap about a month later. I put in   
   > higher voltage ones and the AC is back on line.   
   >   
   > I was wondering if putting in 240 VAC to 24VAC center tapped, 10 amp   
   > power transformer, wired to buck the voltage makes any sense?   
      
    How about a variac to lower the voltage.  (kinda spendy...   
   might be better to invest in new AC unit.)   
      
   George H.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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