C57.12.20-2011 - 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

Standard Details

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 are covered in this standard.

Standards Committee	PE/TR - Transformers
Status	Superseded
Superseded by	C57.12.20-2017
Board Approval	2011-06-16
History	Published Date:2011-09-20

Additional Resources Details

PAR	Approved PAR

Working Group Details

Working Group	Dist-WGC57.12.20 - Distribution - OH Dist. Xfrmers Working Group
Working Group Chair	Alan Traut
Standards Committee	PE/TR - Transformers
Society	IEEE Power and Energy Society
IEEE Program Manager	Malia Zaman
Active Projects	Active PC57.12.20 - 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 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.
Existing Standards	Superseded C57.12.20-2005 - Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller: High Voltage, 34500 Volts and Below; Low Voltage, 7970/13800Y Volts and Below 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.
	Active C57.12.20-2017 - 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 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.