IEEE - ANSI C57.12.20
Overhead-Type Distribution Transformers 500 kVA and Smaller; High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below
|Publication Date:||28 September 2017|
This standard covers certain electrical, dimensional, and mechanical characteristics and safety features of single- and three-phase. 60 Kz. 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.