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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ransom, D.L. Hamilton, R. |
| Copyright Year | 2012 |
| Description | Author affiliation: Basler Electr. Co., Highland, IL, USA (Ransom, D.L.; Hamilton, R.) |
| Abstract | Thermal issues shorten motor life. Modern motor relays must protect for these effects, which can occur for motors from small to large (50 HP and greater), and for all voltage operational levels. However, being too conservative on thermal limits decreases motor productivity. An ANSI/IEEE 49 thermal element creates a realistic thermal model of the motor because the element takes the load level and negative-sequence currents into account. The 49 thermal element is superior to older methods using inverse-time overcurrent elements (51). This paper discusses updates in the existing 49 thermal model implementation. Also discussed are resistance temperature detector (RTD) biasing, resistance temperature detector voting and the role of transducers in the modern motor relay. |
| Sponsorship | IEEE Ind. Applications Soc. |
| Starting Page | 1 |
| Ending Page | 7 |
| File Size | 332959 |
| Page Count | 7 |
| File Format | |
| ISBN | 9781467309240 |
| ISSN | 00903507 |
| e-ISBN | 9781467309257 |
| DOI | 10.1109/PCICON.2012.6549679 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-09-24 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | transducers Motor protection thermal model RTD emergency start |
| Content Type | Text |
| Resource Type | Article |
| Subject | Fuel Technology Energy Engineering and Power Technology |
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