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Ferroresonant Overvoltage Control Based on TNA Tests on Three-Phase Wye-Delta Transformer Banks

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1 Author(s)
Hopkinson, Ralph H. ; General Electric Company, Electric Utility Engineering Operation

This paper shows possible ferroresonant overvoltages on wye-delta transformer banks during single-phase switching as a function of transformer size and lateral length. Application guide is based on industry standard voltage criteria. Secondary loading and neutral resistor requirements are given. A neutral resistor presents an attractive solution in many cases. Simple to use equations are given to allow application of test data.

Published in:

Power Apparatus and Systems, IEEE Transactions on  (Volume:PAS-87 ,  Issue: 2 )