IEEE Std C57.12.23-2009 PDF

Scope: This standard covers certain electrical, dimensional, and mechanical characteristics and takes into consideration certain safety features of single-phase, 60 Hz, liquid-immersed, self-cooled, submersible distribution transformers with separable insulated high-voltage connectors. These transformers are rated 167 kVA and smaller, with high voltages of 25 000 V and below and with low voltages of 600 V and below. These transformers are generally used for step-down purposes from an underground primary cable supply. These transformers are typically installed in an enclosure below ground level, operated from above and suitable for submerged operation. This standard does not cover the electrical and mechanical requirements of any accessory devices that may be supplied with the transformer. This standard is intended for use as a basis for determining performance, interchangeability, and safety of the equipment covered, and to assist in the proper selection of such equipment.

IEEE Std C57.12.23-2009 history

2019 IEEE 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
2009 IEEE 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
1970 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
1992 IEEE 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)