C57.12.00 IEEE Standard General Requirements for Liquid-Immersed Distribution, Power and Regulating Transformers. C57.12.26 Pad-Mounted, Compartmental-Type, Self-Cooled Three-Phase Distribution Transformers with Separable Insulated High-Voltage Connections; High-Voltage, 34500GrdY/19900 Volts and Below; Low Voltage 2500 kVA and Smaller-Requirements. C57.12.28 – Pad-Mounted Equipment – Enclosure Integrity C57.12.90 – IEEE Standard Test Code for Liquid-Immersed Distribution, Power and Regulating Transformers and IEE Guide for Short-Circuit Testing of Distribution and Power Transformers. C57.12.91 – Guide for Loading Mineral-Oil-Immersed Overhead and Pad-Mounted Transformers Rated 500 kVA and less with 65 C Average Winding Rise. C57.91 – Guide for Loading Mineral-Oil-Immersed Overhead and Pad-Mounted Transformers with 65 C or 55 Average Winding Rise.
