So what happens if you try running your house off a 25KW generator? On Sat, Jul 29, 2017 at 12:36 PM, Dan Penoff via Mercedes < mercedes@okiebenz.com> wrote:
> In the generator industry alternators are wound in two flavors typically, > (there are some outliers which I will ignore for the sake of clarity) which > are 12 lead (also known as a broad range reconnectible alternator) and four > lead alternators. > > A twelve lead alternator is typically 20kW and larger, although some > manufacturers (Onan) made them as small as 7.5 kW. They have six coils > which can be connected in a number of different configurations to give both > three phase and single phase outputs ranging from 120/208 VAC to 480 VAC. > > A four lead alternator is a fixed voltage, and can be single phase or > three phase. Essentially, it’s either been wound for a specific voltage > and phase (usually single phase 120/240 VAC) or it’s really a twelve lead > alternator that has been connected internally in the coils for a given > voltage and phase and only the output leads are brought out for connection. > > So in most cases, if you find a generator set that is say 30kW and it’s > connected for 277/480 VAC/3P, you can probably reconnect it to 120/240 > VAC/1P with minimal effort other than rearranging the configuration of the > output leads. Going from three phase to single phase will cost some > efficiency and as a result output, but that is determined by the way the > alternator is wound and how well the prime mover is matched to the > alternator as far as horsepower. That means your 30kW alternator might > only make 25kW in a single phase configuration, for example. > > -D > > > > > On Jul 29, 2017, at 1:06 PM, Craig via Mercedes <mercedes@okiebenz.com> > wrote: > > > > On Sat, 29 Jul 2017 12:29:43 -0400 Dan Penoff via Mercedes > > <mercedes@okiebenz.com> wrote: > > > >> It’s probably a 12 lead broad range reconnectable alternator. Nearly > >> everything is in the industry above 20kW. > >> > >> If you reconnect a three phase alternator to single phase the loss is > >> in the range of about 20%-30%. A lot depends on the way the alternator > >> is wound and its efficiency. > > > > > > The page does say, "Leads: 12." > > > > > > Craig > > > > _______________________________________ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
