IEEE Std C57.12.34-2009 PDF

Scope: This standard covers certain electrical, dimensional, and mechanical characteristics and takes into consideration certain safety features of three-phase, 60 Hz, liquid-filled, self-cooled, pad-mounted, compartmental-type distribution transformers. These transformers are rated 5 MVA and smaller, with the high-voltage limit of 34.5 kV system nominal voltage and below, and with the low-voltage limit of 15 kV system nominal voltage and below. These transformers are generally used for step-down purposes from an underground primary cable supply. This standard covers the connector, bushing, and terminal arrangements for radial- or loop-feed systems. Either certain minimum dimensions or certain specific dimensions shall be specified. This standard does not cover the electrical and mechanical requirements of any accessory devices that may be supplied with the transformer.

IEEE Std C57.12.34-2009 Referenced Document

ASME B30.9 Slings
IEEE Std C57.12.00 IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers
IEEE Std C57.12.28 Pad-Mounted Equipment-Enclosure Integrity
IEEE Std C57.12.29 Pad-Mounted Equipment-Enclosure Integrity for Coastal Environments
IEEE Std C57.12.70 Standard Terminal Markings and Connections for Distribution and Power Transformers
IEEE Std C57.12.90 IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers

1970 IEEE Std C57.12.34-2022 IEEE Standard Requirements for Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase Distribution Transformers, 10 MVA and Smaller; High-Voltage, 34.5 kV Nominal System Voltage and Below; Low-Voltage, 15 kV Nominal System Voltage and Below
2015 IEEE Std C57.12.34-2015 Requirements for Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase Distribution Transformers, 10 MVA and Smaller; High-Voltage, 34.5 kV Nominal System Voltage and Below; Low-Voltage, 15 kV Nominal System Voltage and Below
2009 IEEE Std C57.12.34-2009 Requirements for pad-mounted, compartmental-type, self-cooled, three-phase distribution transformers, 5 MVA and smaller; high voltage, 34.5 kV nominal system voltage and below; low voltage, 15 kV nominal system voltage and below
2005 IEEE Std C57.12.34/COR-2005 Requirements for pad-mounted, compartmental-type, self-cooled, three-phase distribution transformers (2500 kVA and smaller) - High-voltage: 34500 GrdY/19920 volts and below; low-voltage: 480 volts and below
2004 IEEE Std C57.12.34-2004 Requirements for pad-mounted, compartmental-type, self-cooled, three-phase distribution transformers (2500 kVA and smaller) - High-voltage: 34500 GrdY/19920 volts and below: low-voltage: 480 volts and below