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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Galli, A.W. Cox, M.D. |
| Copyright Year | 1986 |
| Abstract | Temperature rise tests on standard single-phase, oil-filled distribution transformers are compared for sinusoidal and nonsinusoidal current conditions. In addition to a stock 50 kVA unit, two 25 kVA transformers were specifically constructed with embedded thermocouples that permitted the true hot-spot temperatures to be measured under load. Test results show that when subjected to full-load currents having low-order harmonic distortion values up to 40 percent THD, the average winding temperature rise is 2 to 7/spl deg/C hotter than for full-load sinusoidal currents. The greatest difference recorded between the average winding temperature and the hot-spot temperature was 7/spl deg/C, significantly less than the 15/spl deg/C allowance given in the standards. This study indicates that the present standard for sizing small distribution transformers supplying nonsinusoidal currents appears to provide good estimations of load capability. |
| Sponsorship | IEEE Power Engineering Society |
| Starting Page | 283 |
| Ending Page | 291 |
| Page Count | 9 |
| File Size | 901095 |
| File Format | |
| ISSN | 08858977 |
| Volume Number | 11 |
| Issue Number | 1 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1996-01-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Temperature distribution Transformers Current supplies Testing Harmonic distortion Temperature measurement Distortion measurement Power industry Mass production Electric vehicles |
| Content Type | Text |
| Resource Type | Article |
| Subject | Energy Engineering and Power Technology Electrical and Electronic Engineering |
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