What is the criteria for selection of Vector Group of a Transformer for a given application ?
What is the criteria for selection of Vector Group of a Transformer for a given application ?
(OP)
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What is the criteria for selection of Vector Group of a Transformer for a given application ?
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What is the criteria for selection of Vector Group of a Transformer for a given application ?What is the criteria for selection of Vector Group of a Transformer for a given application ?(OP)
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RE: What is the criteria for selection of Vector Group of a Transformer for a given application ?
Matching existing transformers.
What does the supplier have in stock?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: What is the criteria for selection of Vector Group of a Transformer for a given application ?
RE: What is the criteria for selection of Vector Group of a Transformer for a given application ?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: What is the criteria for selection of Vector Group of a Transformer for a given application ?
ANSI standard is that the low side lags the high side by 30 degrees. Exceptions are old transformers or special circumstances. IEC practice (as I read about it here) seems to be wide open. But any odd numbered vector group can become any other odd numbered vector group with a bit of creative reconnection just as any even numbered vector group can become any other even numbered vector group.
RE: What is the criteria for selection of Vector Group of a Transformer for a given application ?
Distrubution transformers are with Dy1 (IEC) or Dy11(understand US has many alternatives)so as to get the same vector at consumer end and to avoid third harmonic currents entering in to grid.
Solar or wind turbine transformers are with connections Dyn5 or Dyn11 connections to suit inverters.This will be conneced to grid by Yd1 tarnsformers.
Rectifiers have unique connections and vector groups -See C57.18.10-1998 Converter Transformers.Pumped storage hydro plants have started to use a novel connection recently.
To get a earthing neutral point in unearthed systen zig-zag connection is used. Traction supply systems have different connections in various countries.