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Six phase electric supply.

Sparkingchip
db3fecfec837110019a09ec7585f1e33-huge-a72a8449-52a6-4c2f-b7dd-13b18ecd4933.jpg


This photo has appeared on my Facebook page.


I will let this run a bit then tell you where it is and who posted if if no one guesses, though I suspect at least one forum member will recognise it straightaway.


If I read it correctly it does say it has a six phase supply.


Andy Betteridge
Parents
  • 0
    This is the rating plate from a mercury arc rectifier set, 200 kW means that it is one of the larger rectifier sets made by The Hewittic Company, probably two or more rectifiers in parallel.  As it refers to 6-phase, it may be the rating plate from the transformer.  Mercury arc rectifiers were one of the few ways that ac supplies could be converted to dc at high power level in the earlier part of the 20th century when solid state rectifiers could not handle high powers, and remained in use into the 2000's, notably on the South to North island dc link in New Zealand, and on the Manx Tramway until a few years ago.

    The six phases are derived from 3-phase, a delta wound primary with two star connected secondaries, one in anti-phase to the other.  By connecting the star points together, six phases are obtained. 


    I look after a working set on public display at the Kempton Steam Museum.


    David
Reply
  • 0
    This is the rating plate from a mercury arc rectifier set, 200 kW means that it is one of the larger rectifier sets made by The Hewittic Company, probably two or more rectifiers in parallel.  As it refers to 6-phase, it may be the rating plate from the transformer.  Mercury arc rectifiers were one of the few ways that ac supplies could be converted to dc at high power level in the earlier part of the 20th century when solid state rectifiers could not handle high powers, and remained in use into the 2000's, notably on the South to North island dc link in New Zealand, and on the Manx Tramway until a few years ago.

    The six phases are derived from 3-phase, a delta wound primary with two star connected secondaries, one in anti-phase to the other.  By connecting the star points together, six phases are obtained. 


    I look after a working set on public display at the Kempton Steam Museum.


    David
Children
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