ANSI C57.12.25-1990
Transformers - Pad-Mounted, Compartmental-Type, Self-Cooled, Single-Phase Distri- bution Transformers with Separable Insulated High-Voltage Connectors; High Voltage, 34 500 GrdY/19 920 Volts and Below; Low-Voltage, 240/ 120 Volts; 167 kVA and Smaller - Re