Abstract
Open-delta/open-delta and open-wye/open-delta transformer banks are often used as an economic means of supplying simultaneous single-phase and 3-phase loads in rural areas. If the 3-phase load is an induction motor, the inherent voltage unbalance causes increased losses and uneven heating that may lead to motor failure. Often these motors are submersible or deep well pump motors located in remote unattended areas or air conditioning motors which may not have sufficient over-design to handle the voltage unbalance. The theory analyzing the open-delta distribution system has existed for many years, however, because of the tedious and almost infinite differences in distribution topology, the problem has been neglected. The purpose in this endeavor is to present a simple general approach to the solution of the problem by utilizing existing motor and network concepts and theories. Two previously published theories are used to predict motor heating and the motor derating that is necessary to prevent insulation failure due to the unbalanced voltages. A general motor model has been developed. Motor heating and derating are obtained from the model through a generalized digital computer program. Copyright © 1976 by The Institute of Electrical and Electronics Engineers. Inc.
Recommended Citation
S. C. Seematter and E. F. Richards, "Computer Analysis Of 3-Phase Induction Motor Operation On Rural Open-Delta Distribution Systems," IEEE Transactions on Industry Applications, vol. IA thru 12, no. 5, pp. 479 - 486, Institute of Electrical and Electronics Engineers, Jan 1976.
The definitive version is available at https://doi.org/10.1109/TIA.1976.349457
Department(s)
Electrical and Computer Engineering
International Standard Serial Number (ISSN)
1939-9367; 0093-9994
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
01 Jan 1976
