IEEE C57.12.20-2023 PDF
This standard covers certain electrical, dimensional, and mechanical characteristics and safety features of single- and three-phase, 60-Hz, liquid-immersed, self-cooled, overhead-type distribution transformers 500 kVA and smaller, high voltages 34 500 V and below, and low voltages 7970/13 800Y V and below. This standard is intended for use as a basis for determining the performance, interchangeability, and safety of overhead-type distribution transformers and to assist in the proper selection of this equipment. Revision Standard - Active. Certain electrical, dimensional, and mechanical characteristics and safety features of single- and three-phase, 60-Hz, liquid-immersed, self-cooled, overhead-type distribution transformers 500 kVA and smaller, high voltages 34 500 V and below, and low voltages 7970/13 800Y V and below are covered in this standard.IEEE C57.12.20-2023 History
IEEE C57.12.20-2023
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IEEE C57.12.20-2017
$41.00 $82.00
IEEE C57.12.20-2011
$49.00 $99.00
IEEE C57.12.20-2005
$43.00 $87.00
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