IEEE C57.12.23-2002 Standard for Underground Type@ Self-Cooled@Single-Phase@ Distribution Transformers with Separable Insulated High-Voltage Connectors; High Voltage 25 000 V and Below; Low Voltage 600 V and Below; 167 kVA and Smaller
This standard covers certain electrical@ dimensional@ and mechanical characteristics and takes into consideration certain safety features of single-phase@ 60 Hz@ mineral-oil-immersed@ self-cooled@ 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 and are suitable for occasional submerged operation.This standard does not cover the electrical and mechanical requirements of any accessory devices that may be supplied with the transformer.PurposeThis 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 C57.12.23-2002 history
1970IEEE C57.12.23-2018 Submersible Single-Phase Transformers: 167 kVA and Smaller; High Voltage 25 000 V and Below; Low Voltage 600 V and Below
2009IEEE 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
2002IEEE C57.12.23-2002 Standard for Underground Type@ Self-Cooled@Single-Phase@ Distribution Transformers with Separable Insulated High-Voltage Connectors; High Voltage 25 000 V and Below; Low Voltage 600 V and Below; 167 kVA and Smaller
1992IEEE C57.12.23-1992 Standard for 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)