| C57.13.2-1991 - IEEE Standard Conformance Test Procedures for Instrument Transformers           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        1988-01-01           | 
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                                                                                        | C57.13.2-2005 - IEEE Standard for Conformance Test Procedure for Instrument Transformers           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2005-10-17           | 
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                                                                                        | C57.13.3-1983 - IEEE Guide for the Grounding of Instrument Transformer Secondary Circuits and Cases           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        1988-01-01           | 
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                                                                                        | C57.13.3-2005 - IEEE Guide for Grounding of Instrument Transformer Secondary Circuits and Cases           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2006-06-05           | 
                                                                                                   | 
              
          
                                                                                        | C57.13.3-2014 - IEEE Guide for Grounding of Instrument Transformer Secondary Circuits and Cases           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2015-01-20           | 
                                                                                                   | 
              
          
                                                                                        | C57.13.3-2014 - IEEE Guide for Grounding of Instrument Transformer Secondary Circuits and Cases - Redline           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2015-06-01           | 
                                                                                                   | 
              
          
                                                                                        | C57.13.5-2003 - IEEE Standard of Performance and Test Requirements of Instrument Transformers of a Nominal Voltage of 115 kV and Above           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2007-09-10           | 
                                                                                                   | 
              
          
                                                                                        | C57.13.5-2009 - IEEE Standard of Performance and Test Requirements for Instrument Transformers of a Nominal System Voltage of 115 kV and Above           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2009-12-31           | 
                                                                                                   | 
              
          
                                                                                        | C57.13.5-2009 - IEEE Standard of Performance and Test Requirements for Instrument Transformers of a Nominal System Voltage of 115 kV and Above - Redline           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2011-10-14           | 
                                                                                                   | 
              
          
                                                                                        | C57.13.5-2019 - IEEE Standard for Performance and Test Requirements for Instrument Transformers of a Nominal System Voltage of 115 kV and Above           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Components, Circuits, Devices and Systems           | 
                                                                                        2020-02-20           | 
                                                                                                   | 
              
          
                                                                                        | C57.13.5-2019 - IEEE Standard for Performance and Test Requirements for Instrument Transformers of a Nominal System Voltage of 115 kV and Above - Redline           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Components, Circuits, Devices and Systems           | 
                                                                                        2020-04-29           | 
                                                                                                   | 
              
          
                                                                                        | C57.13.6-2005 - IEEE Standard for High Accuracy Instrument Transformers           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2005-12-27           | 
                                                                                                   | 
              
          
                                                                                        | C57.13.7-2018 - IEEE Standard for Current Transformers with Maximum Milliampere Secondary Current of 250 mA           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Components, Circuits, Devices and Systems           | 
                                                                                        2019-08-30           | 
                                                                                                   | 
              
          
                                                                                        | C57.130-2015 - IEEE Guide for the Use of Dissolved Gas Analysis Applied to Factory Temperature Rise Tests for the Evaluation of Mineral Oil-Immersed Transformers and Reactors           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2016-02-19           | 
                                                                                                   | 
              
          
                                                                                        | C57.131-1995 - IEEE Standard Requirements for Load Tap Changers           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        1988-01-01           | 
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                                                                                        | C57.131-2012 - IEEE Standard Requirements for Tap Changers           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2012-05-01           | 
                                                                                                   | 
              
          
                                                                                        | C57.131-2012 - IEEE Standard Requirements for Tap Changers - Redline           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2012-06-27           | 
                                                                                                   | 
              
          
                                                                                        | C57.131-2024 - IEEE Standard Performance Requirements and Test Methods for Tap-Changers           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2024-05-22           | 
                                                                                                   | 
              
          
                                                                                        | C57.131-2024 - IEEE Standard Performance Requirements and Test Methods for Tap-Changers - Redline           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        2025-04-30           | 
                                                                                                   | 
              
          
                                                                                        | C57.134-2000 - IEEE Guide for Determination of Hottest-Spot Temperature in Dry-Type Transformers           | 
                                                                                        IEL Online           | 
                                                                                        IEEE           | 
                                                                                        Power, Energy and Industry Applications           | 
                                                                                        1988-01-01           | 
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