LTC compensating winding for parallel operation of transformers
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United States of America Patent
Stats
-
Nov 29, 1994
Grant Date -
N/A
app pub date -
Apr 27, 1993
filing date -
Apr 27, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A winding configuration for a transformer equipped with a load tap changer which maintains an impedance balance when the transformer is connected in parallel with another transformer in the field. The winding configuration, from the core outward, consists of a first compensating winding, a low voltage (LV) winding, a load tap changer (LTC) winding, a high voltage (HV) winding, and a second compensating winding. If the impedance of the transformer has to be lowered to match the impedance of the existing unit in the field, the second compensating winding is coupled in series with the LV winding. If the impedance of the transformer has to be increased to match the impedance of the existing unit in the field, the first compensating winding is coupled in series with the LV winding.
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