[GreenKeys] 2 1/2A SCREW IN FUSE

[Bruce Gentry]

   Two phase may still found in some older buildings and factories, but 
was disappearing fast when I retired in 2009. My dealings with it were 
in elevators, it was easier and less expensive to produce it for a large 
building or factory complex than to rewind or replace motors.  I don't 
think it is generated directly anymore, but by using transformers in the 
Scott Connection, three phase can be converted to two and vice versa.

      Bruce Gentry, KA2IVY

On 8/13/17 9:39 PM, Ralph Mowery wrote:
> The standard US 120/240 volt system has been called many things by people
> that
> Don't know the system.
>
> At the power pole for most homes is a transformer that has a 240 volt
> Center tapped winding feeding the house.  It is often called a
> Split phase or center  tapped single phase.
>
> Some try to call it a 2 phase system, but that is not true.
> There is a real 2 phase system, but the phases are out by 90 deg.
> And would not be common in most homes.
>
> Not sure if it is still used but there is that 3 phase mess
> That is 120 volts and 208 volts.  Just not common in the
> Area I live in.
>
>
>> -----Original Message-----
>> From: greenkeys-bounces at mailman.qth.net [mailto:greenkeys-
>> bounces at mailman.qth.net] On Behalf Of Dave Horsfall
>> Sent: Sunday, August 13, 2017 6:58 PM
>> To: Greenkeys
>> Subject: Re: [GreenKeys] 2 1/2A SCREW IN FUSE
>>
>> On Sun, 13 Aug 2017, Jeffrey Angus wrote:
>>
>>>        Being used to 415v 3-phase, I find your 2-phase system quite
>> odd
>>>        :-)
>>>
>>> Another misnomer, it is not 2-phase. It's center tapped single phase.
>> I stand corrected.
>>
>> -- 
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