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IEEE C57.12.20-2005

Historical Revision

IEEE Standard for Overhead-Type Distribution Transformers 500 kVA and Smaller; High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below

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Revision Standard - Superseded. This standard covers certain electrical, dimensional, and mechanical characteristics and safety features of single- and three-phase, 60 Hz, mineral-oil-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 project is a revision of an existing product standard covering certain electrical, dimensional and mechanical characteristics and safety features of single and three phase, 60 HZ, mineral oil immersed, self cooled, overhead type distribution transformers 500 kVA and smaller, High Voltages 34500 volts and below with Low Voltages 7970/13800Y volts and below.
This project is to maintain and update the subject standard which 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.

SDO IEEE: Institute of Electrical and Electronics Engineers
Document Number C57.12.20
Publication Date Dec. 9, 2005
Language en - English
Page Count 65
Revision Level
Supercedes
Committee Transformers
Publish Date Document Id Type View
Feb. 1, 2024 C57.12.20-2023 Revision
Nov. 30, 2017 C57.12.20-2017 Revision
Sept. 20, 2011 C57.12.20-2011 Revision
Dec. 9, 2005 C57.12.20-2005 Revision