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024 7 $a10.1109/IEEESTD.1981.81014
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100   $a20231206d1981      uy             0
101 0 $aeng
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181   $ctxt$2rdacontent
182   $cc$2rdamedia
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200 10$aANSI/IEEE Std C57.91-1981 $eIEEE Guide for Loading Mineral-Oil-Immersed Overhead and Pad-Mounted Distribution Transformers Rated 500kVA and Less with 65 C or 55 C Average Winding Rise /$fInstitute of Electrical and Electronics Engineers
210  1$aNew York, New York :$cIEEE,$d1981.
215   $a1 online resource (26 pages)
330   $aGeneral 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.
517   $aANSI/IEEE Std C57.91-1981: IEEE Guide for Loading Mineral-Oil-Immersed Overhead and Pad-Mounted Distribution Transformers Rated 500 kVa and Less With 65 Degrees C Or 55 Degrees C Average Winding Rise
606   $aElectric transformers$xProtection
615  0$aElectric transformers$xProtection.
676   $a621.317
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