IEEE C57.91-1981 PDF
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IEEE Guide for Loading Mineral-Oil-Immersed Overhead and Pad-Mounted Distribution Transformers Rated 500kVA and Less with 65 C or 55 C Average Winding Rise
standard by IEEE, 07/31/1981
New IEEE Standard – Superseded.General recommendations for loading 65 degrees Centigrade-rise mineral-oil-immersed overhead and pad-mounted distribution transformers are covered. Recommendations for 55 degrees Centigrade-rise transformers are included because a substantial percentage of these transformers are still in service. The recommendations are based on winding hottest-spot calculations only. Other factors that may limit the permissible load to lower values are listed. A method to establish winding temperature and loss of life by nomographs is given.
Product Details
- Published:
- 07/31/1981
- ISBN(s):
- 9780738143019
- Number of Pages:
- 26
- File Size:
- 1 file , 1.5 MB
- Product Code(s):
- STDSU08177
- Note:
- This product is unavailable in Russia, Belarus
