IEEE Std C57.12.23-2002 IEEE Standard for Underground Type, Self-Cooled, Single-Phase, Distribution Transformers with Separable Insulated High-Voltage Connectors; High Voltage 25000 V and Below; Low Voltage 600 V and Below; 167 kVA and Smaller
2019IEEE Std C57.12.23-2018 IEEE Standard for Submersible Single-Phase Transformers:250 kVA and Smaller; High Voltage 34 500 GrdY/19 920 V and Below; Low Voltage 600 V and Below
2009IEEE Std C57.12.23-2009 Submersible Single-Phase Transformers: 167 kVA and Smaller; High Voltage 25 000 V and Below; Low Voltage 600 V and Below
1970IEEE Std C57.12.23-2002 IEEE Standard for Underground Type, Self-Cooled, Single-Phase, Distribution Transformers with Separable Insulated High-Voltage Connectors; High Voltage 25000 V and Below; Low Voltage 600 V and Below; 167 kVA and Smaller
1992IEEE Std C57.12.23-1992 Transformers; underground-type, self-cooled, single-phase distribution transformers with separable, insulated, high-voltage connectors; high voltage (24 940 GrdY/14 400 V and below) and low voltage (240/120 V, 167 kVA and smaller)