----- Original Message ----- From: "Gene Mechtly" <[EMAIL PROTECTED]> To: "Chimpsarecute" <[EMAIL PROTECTED]> Cc: "U.S. Metric Association" <[EMAIL PROTECTED]> Sent: Saturday, 2004-02-07 12:26 Subject: Re: [USMA:28536] Re: Torque and horsepower
> On Wed, 4 Feb 2004, Chimpsarecute wrote: > > ... > > In Germany, ... > > > > In the US, the 3 phases on the pole are at 13.5 kV line to line... > > Not true. In the US, three phase transformers are found only at > "substations" on concrete, surrounded by wire fences. Yes, true! I wasn't talking about the location of the transformers, but the lines servicing the customers. The lines at the top of the pole are three pahse and at 13.5 kV. The transformers on the poles are single phase, yes, but they tap off of either one of the 3 phase lines to neutral or across 2 of the 3 phases. > > A maximum of three or four houses are served by one *single phase* > transformer "on the pole" or, in newer housing developments, by a single > phase transformer mounted inside a steel enclosure sitting on the ground > and connected by underground single-phase cables. Still these transformers derive their power from a 3 phase line. > > Gene. > >
