Working Group Details
Dist-WGC57.12.38 - Distribution - Pad-Mount 1 Self Cool <=250kVA Working Group
|Working Group Chair||
|IEEE Program Manager|
IEEE C57.12.38-2014 - IEEE Standard for Pad-Mounted-Type, Self-Cooled, Single-Phase Distribution Transformers 250 kVA and Smaller: High Voltage, 34 500 GrdY/19 920 V and Below; Low Voltage, 480/240 V and Below
Certain electrical, dimensional, and mechanical characteristics are covered in this standard, and certain safety features of single-phase, 60-Hz, mineral-oil-immersed, self-cooled, pad-mounted, compartmental-type distribution transformers are taken into consideration. These transformers are rated 250 kVA and smaller with high voltages of 34 500 GrdY/19 920 V and below and with low voltages of 480/240 V and below. These transformers are generally used for step-down purposes from an underground primary cable supply. The connector, bushing, and terminal arrangements for radial or loop feed systems are covered in this standard. The electrical and mechanical requirements of any accessory devices that may be supplied with the transformer are not covered in this standard.
IEEE C57.12.38-2014/Cor 1-2016 - IEEE Standard for Pad-Mounted-Type, Self-Cooled, Single-Phase Distribution Transformers 250 kVA and Smaller: High Voltage, 34 500 GrdY/19 920 V and Below; Low Voltage, 480/240 V and Below - Corrigendum 1: Figure 1A
Identified in the 2014 published version of IEEE Std C57.12.38 is an error. Tw0 dimensions were provided for the high-voltage bushing height above the base of the transformer. The lower dimension (597+114/-13) should have been designated as being for units 167 kVA and 250 kVA only. The error is corrected in this corrigendum.