| C57.12.14-1982 - IEEE Trial-Use Standard for Dielectric Test Requirements for Power Transformers for Operation at System Voltages from 115 kV Through 230 kV |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2002-12-10 |
|
| C57.12.20-1997 - American National Standard for Transformers - Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller: High Voltage 34500 Volts and Below: Low Voltage, 7970/13800Y Volts and Below |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2014-06-11 |
|
| C57.12.20-2005 - Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller: High Voltage, 34500 Volts and Below; Low Voltage, 7970/13800Y Volts and Below |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2006-01-23 |
|
| C57.12.20-2011 - IEEE Standard for Overhead-Type Distribution Transformers 500 kVA and Smaller: High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2011-09-21 |
|
| C57.12.20-2011 - IEEE Standard for Overhead-Type Distribution Transformers 500 kVA and Smaller: High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below - Redline |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2012-02-27 |
|
| C57.12.20-2017 - IEEE Standard for Overhead-Type Distribution Transformers 500 kVA and Smaller; High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below |
IEL Online |
IEEE |
Components, Circuits, Devices and Systems |
2017-12-01 |
|
| C57.12.20-2023 - IEEE Standard for Overhead-Type Distribution Transformers 500 kVA and Smaller; High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below |
IEL Online |
IEEE |
Components, Circuits, Devices and Systems |
2024-01-31 |
|
| C57.12.200-2022 - IEEE Guide for the Dielectric Frequency Response Measurement of Bushings |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2023-01-25 |
|
| C57.12.21-2000 - American National Standard Requirements for Pad-Mounted, Compartmental-Type, Self-Cooled, Single-Phase Distribution Transformers With High-Voltage Bushings |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2005-02-07 |
|
| C57.12.210-2024 - IEEE Recommended Practice for On-load Capacity Switching Distribution Transformers |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2025-02-28 |
|
| C57.12.22-1995 - American National Standard for Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase Distribution Transformers With High-Voltage Bushings, 2500 kVA and Smaller; High Voltage, 34 500 GrdY/19 920 Volts and Below |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2005-02-07 |
|
| C57.12.23-1992 - IEEE 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 |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
1988-01-01 |
|
| 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 |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2002-12-10 |
|
| C57.12.23-2009 - IEEE Standard for Submersible Single-Phase Transformers: 167 kVA and Smaller; High Voltage 25 000 V and Below; Low Voltage 600 V and Below |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2009-05-08 |
|
| C57.12.23-2009 - IEEE Standard for Submersible Single-Phase Transformers: 167 kVA and Smaller; High Voltage 25 000 V and Below; Low Voltage 600 V and Below - Redline |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2012-02-24 |
|
| 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 |
IEL Online |
IEEE |
Components, Circuits, Devices and Systems |
2019-08-20 |
|
| 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 - Redline |
IEL Online |
IEEE |
Components, Circuits, Devices and Systems |
2019-10-11 |
|
| C57.12.24-1994 - American National Standard for Transformers-- Underground-Type Three-Phase Distribution Transformers, 2500 kVA and Smaller, High Voltage, 34 500 GrdY/19 920 Volts and Below, Low Voltage, 480 Volts and Below - Requirements |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2005-01-31 |
|
| C57.12.24-2000 - American National Standard for Transformers-- Underground-Type Three-Phase Distribution Transformers 2500 kVA and Smaller; High Voltage: 34,500 GrdY/29 920 Volts and Below; Low Voltage: 480 Volts and Below--Requirements |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2006-11-20 |
|
| C57.12.24-2009 - IEEE Standard for Submersible, Three-Phase Transformers, 3750 kVA and Smaller: High Voltage, 34 500 GrdY/19 920 Volts and Below; Low Voltage, 600 Volts and Below |
IEL Online |
IEEE |
Power, Energy and Industry Applications |
2009-08-18 |
|
