On Wednesday, August 1, 2007 at 7:52:56 AM UTC-5, Nate wrote:   
   > There are a few other posts about this but I'm going to chime in   
   > also.   
   >   
   > We just installed a Generac 16KW generator at our office to supply our   
   > server room, network backbone, phone system, and supporting air   
   > conditioning.  First test after installation showed that every APC UPS   
   > would NOT accept the power from the generator... this is pretty much   
   > all of the gear that we are trying to protect.  Frequency checks on   
   > the generator indicate that it's low... around 57 to 58 Hz (no means   
   > to adjust it).  Called Generac and was told this is a known issue and   
   > that this generator won't maintain 60 Hz until it's loaded to the   
   > upper end of it's capacity (we're currently running about 55% load).   
   > I'm pretty surprised that Generac is selling a product like this and   
   > apparently it's only an issue in their V-twin engine models.  I've   
   > worked in the electrical generation/distribution field and I've never   
   > heard of anything like this before.  Even my cheap house and camper   
   > generators maintain frequency throughout their load range.   
   >   
   > One additional note on the UPS units.  We noticed that the Tripp Lites   
   > do accept the power because their frequency tolerance is twice that of   
   > the APC line.  Also, the larger rack mount APCs do have a sensitivity   
   > adjustment which, when adjusted fully, will accept the low freq   
   > power.  End result is that we're looking at replacing all our smaller   
   > UPS units or working in additional load to the generator.   
      
   The more I use Generac the more i realize they are crap. You can buy a cheaper   
   chinese brand thats 100% better.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)