Two and Three Winding Xformer
Two and Three Winding Xformer
(OP)
Ok.. I am not very experienced on this subject.. can somebody explain the difference between these? or is it just another way of saying 1-phase and 3-phase xformer?
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Two and Three Winding Xformer
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Two and Three Winding XformerTwo and Three Winding Xformer(OP)
Ok.. I am not very experienced on this subject.. can somebody explain the difference between these? or is it just another way of saying 1-phase and 3-phase xformer?
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RE: Two and Three Winding Xformer
A common use of a three-winding transformer is in generating stations to tie two generators to the same high voltage bus while limiting short circuit current and reducing HV switchyard costs since there is only one HV breaker. Typical ratings might be: Primary 345kV, 200 MVA. Secondary 18 kV 100 MVA, Tertiary 18 kV 100 MVA.
Another common example is the 480 - 240 x 120 dry type transformer with two identical but separate 120 V windings that can be connected in parallel for full power at 120V or in series for the "standard" 240/120 V grounded neutral single phase connection.
Three winding transformers are prevalent as the front end for rectifier systems. By using different winding connections to get multiple phases the rectifer can be fed with 6 or 12 phase instead of three.
Just to make it confusing, is a 230kV-115kV-13.8kV wye-wye, 3-phase autotransformer with a 13.8 kV delta tertiary winding a two- or three-winding?
RE: Two and Three Winding Xformer
RE: Two and Three Winding Xformer
RE: Two and Three Winding Xformer
RE: Two and Three Winding Xformer
Bill
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