IEEE C57.12.23-2009 pdf free.IEEE Standard for Submersible Single-Phase Transformers: 1 67 kVA and Smaller; High Voltage 25 000 V and Below; Low Voltage 600 V and Below.
IEEE C57.12.23 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 arc 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.
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.
ICEA S-66-524/NEMA WC 7-1991, Standard for Cross-Linked-Thermosetting-Polyethylene-Insulated Wire and Cable for the Transmission and Distribution of Electrical Energy.’
IEEE Sid 386TM1995, IEEE Standard for Separable Insulated Connector Systems for Power Distribution Systems Above 600 V.2W
IEEE Std C57.l2.00TM2O00, IEEE Standard General Requirements for liquid-Immersed Distribution. Power, and Regulating Transformers.
IEEE Std (‘57. 12.201M_2005, IEEE Standard for Overhead-Type Distribution Transformers, 50() kVA and Smaller: High Voltage, 34 500 V and Below; Low Voltage, 7970f 13 800 Y V and Below.
IEEE Std C57.l2.32TM2002, IEEE Standard for Submersible Equipment—Enclosure Integrity.
IEEE Std C57.l2.70TM2000, IEEE Standard Terminal Markings and Connections for Distribution and
Power Transformers.
IEEE Std C57. I 2.8OTht2OO2. IEEE Standard Terminology for Power and Distribution Transformers.
IEEE Std (‘57.l2.90Thtl999, IEEE Standard Test Code for Liquid-Immersed Distribution. Power, and Regulating Transformers.
IEEE Std C57.91TM1995 (Reaff 2004), IEEE Guide for Loading Mineral-Oil-Immersed Transformers.IEEE C57.12.23 pdf free download.