Re: Engine Voltage

["Steve" <pracys@eisa.com.au>]

Steve wrote in message ...
>People,
>G,BL,DL,82,N classes of loco have a alternator shunt internally within the
>altenator at around 45kmh this of course varies depending on the type of
>loco.
>It happens as follows:
>0-45kmh accelerating the altenator is conected in parrallel transition then
>occurs and now the alternator makes a series conection to take the loco to
>maximum speed.
>The loco makes a backward transition at about 42kmh.
>This same feature does not exist on the 81 class as it has a larger higher
>capacity alternator than the locos prevoiusly mentioned.
>The two types of alt are AR11 and AR16.
>However having said that all of the types mentioned  are permanent parallel
>conections in regards to traction motor configurations.
>steve
>John MacCallum wrote in message <39D3259A.F5B49518@lisp.com.au>...
>>Ron Bennell wrote:
>>>
>>> The voltage is variable and roughly proportional to engine revs.  I am
>not
>>> sure of the specifics of an 81, but 2000 volts as a maximum would be
>>> reasonable.  For a loco as modern as an 81 it is surprising to me that
>they
>>> have a series/parallel transition.  I believe that most other Clyde/EMDs
>>
>>81 class engines do not shunt the field. The Traction motors are in
>>Parallel with each other. As was mentioned by someone else but ignored
>>by most the Load meter reads the traction current to one traction
>>motor therefore times load meter readings by 6.
>>Max. continuos Voltage in my Manual is quoted at 1300 volts and max.
>>continuos Amperage is 7020 Amps. Rated Power is 2237 kw.
>>
>>By the way G and BL's are also Parallel Engines as 82 and 90 class.
>>
>>Engine
>>
>>--
>>
>>Pope
>>
>>Alias John MacCallum
>
>