IEEE and ANSI Standards are essential guidelines in Electrical tests on Power and distribution Transformers .

Following list shows the IEEE/ANSI Standard codes and their brief description. You are strongly
recommended to visit  www.IEEE.org ,which is a valuable source of Electrical Engineering.
 
 
IEEE Std 62™-1995 Guide for Diagnostic Field Testing of Electric Power Apparatus— Part 1: Oil Filled Power Transformers, Regulators, and Reactors IEEE Std 259™-1999,Standard Test Procedure for Evaluation of Systems of Insulation for Dry-Type Specialty and General Purpose Transformers
IEEE Std 637™-1985 (Reaff 1992) Guide for the Reclamation of Insulating Oil and Criteria for Its Use
IEEE Std 638™-1992 (Reaff 1999) Standard for Qualification of Class 1E Transformers for Nuclear Power Generating Stations
IEEE 1276™-1997 Guide for the Application of High Temperature Insulation Materials in Liquid-Immersed Power Transformers
IEEE Std 1277™-2000 General Requirements and Test Code for Dry-Type and Oil-Immersed Smoothing Reactors for DC Power Transmission
IEEE Std 1388™-2000 Standard for the Electric Reporting of Transformer Test Data
IEEE Std 1538™-2000 Guide for Determining of Maximum Winding Temperature Rise in Liquid-Filled Transformers
IEEE Std C57.12.00™-2000 Standard General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers
IEEE Std C57.12.01™-1998 Standard General Requirements for Dry-Type Distribution and Power Transformer Including Those with Solid-Cast and/or Resin-Encapsulated Windings
ANSI C57.12.10-1997 Standard for Transformers—230 kV and Below 833/958 through 8333/10 417 kVA, Single-Phase, and 750/862 Through 60 000/80 000/100 000 kVA, Three-Phase Without Load Tap Changing; and 3750/4687 Through 60 000/80 000/100 000 kVA with Load Tap Changing—Safety Requirements
ANSI C57.12.20-1997

Standard for Overhead-Type Distribution Transformers, 500 kVA and Smaller: High Voltage, 34500 Volts and Below; Low Voltage, 7970/13800Y Volts and Below

ANSI C57.12.21-1992 Standard for Transformers—Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase Distribution Transformers with High Voltage Bushings; High-Voltage, 34500 GRYD/19920 Volts and Below; Low-Voltage, 240/120 volts; 167 kVA and Smaller
ANSI C57.12.22-1993 (Reaff 1998) Standard for Transformers—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; Low Voltage, 480 Volts and Below
IEEE C57.12.23™-2002 Standard for Transformers—Underground-Type, Self-Cooled, Single-Phase Distribution Transformers With Separable, Insulated, High-Voltage Connectors; High Voltage (24 940 GrdY/14400 V and Below) and Low Voltage (240/120 V,167 kVA and Smaller)
ANSI C57.12.24-2000 Standard for Transformer—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
ANSI C57.12.25-1990 Standard for Transformers—Pad-Mounted, Compartmental-Type, Self-Cooled, Single-Phase Distribution Transformers with Separable Insulated High-Voltage Connectors: High-Voltage, 34 500 GrdY/19 920 Volts and Below; Low-Voltage, 240/120 Volts; 167 kVA and Smaller—Requirements
ANSI C57.12.26-1992 Standard for Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase Distribution Transformers for Use with Separable Insulated High-Voltage Connectors (34 500 GrdY/19 920 Volts and Below; 2500 kVA and Smaller)
ANSI C57.12.28-1999 Standard for Pad-Mounted Equipment—Enclosure Integrity
ANSI C57.12.29-1991 Standard for Pad-Mounted Equipment—Enclosure Integrity for Coastal Environments
ANSI C57.12.29-1999 Errata  
Approved Draft IEEE PC57.12.31™-2002 Standard for Pole-Mounted Equipment—Enclosure Integrity
Approved Draft IEEE PC57.12.32™-2002 Standard for Submersible Equipment—Enclosure Integrity
IEEE C57.12.35™-1996 Standard for Bar Coding for Distribution Transformers
ANSI C57.12.40-2000 Standard for Secondary Network Transformers—Subway and Vault Types (Liquid Immersed)—Requirements
IEEE C57.12.44™-2000 Requirements for Secondary Network Protectors
ANSI C57.12.50-1981 (Reaff 1998) Requirements for Ventilated Dry-Type Distribution Transformers, 1 to 500 kVA, Single-Phase, and 15 to 500 kVA, Three-Phase, with High-Voltage 601 to 34 500 Volts, Low-Voltage 120 to 600 Volts
ANSI C57.12.51-1981 (Reaff 1998) Requirements for Ventilated Dry-Type Power Transformers, 501 kVA and Larger, Three Phase, with High-Voltage 601 to 34 500 Volts,Low-Voltage 208Y/120 to 4160 Volts
ANSI C57.12.52-1981 (Reaff 1998) Requirements for Sealed Dry Type Power Transformers, 50a kVA and Larger, Three Phase and High Voltage 601 to 34 500 Volts, Low Voltage 208Y/120 to 4160 Volts
ANSI C57.12.55-1987 (Reaff 1998) Standard for Dry Type Transformers in Unit Installations, Including Unit Substations—Conformance Standard
IEEE C57.12.56™-1986 (Reaff 1998) Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution Transformers
IEEE C57.12.58™-1991 (Reaff 2002) Guide for Conducting a Transient Voltage Analysis of a Dry-Type Transformer Coil
IEEE Std C57.12.59™-2001 Guide for Dry-Type Transformer Through-Fault Current Duration
IEEE C57.12.60™-1998 Guide for Thermal Evaluation of Insulation Systems for Solid-Cast and Resin-Encapsulated Power and Distribution Transformers
IEEE C57.12.70™-2000 Standard for Terminal Markings and Connections for Distribution and Power Transformers
Approved Draft IEEE PC57.12.80™-2002 Standard Terminology for Power and Distribution Transformers
IEEE C57.12.90™-1999 Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers and Guide for Short-Circuit Testing of Distribution and Power Transformers
IEEE C57.12.91™-2001 Test Code for Dry-Type Distribution and Power Transformers (Revision of IEEE Std C57.91-1981, IEEE Std C57.92-1981, and IEEE Std C57.115-1991)
IEEE C57.13™-1993 Standard Requirements for Instrument Transformers
IEEE C57.13.1™-1981 (Reaff 1999) Guide for Field Testing of Relaying Current Transformers
IEEE C57.13.3™-1983 (Reaff 1990) Guide for the Grounding of Instrument Transformer Secondary Circuits and Cases
IEEE C57.15™-1999 Standard Requirements, Terminology, and Test Code for Step-Voltage and Induction-Voltage Regulators
IEEE C57.16™-1996 (Reaff 2001) Standard Requirements, Terminology, and Test Code for Dry-Type Air-Core Series-Connected Reactors
IEEE C57.18.10™-1998 Standard Practices and Requirements for Semiconductor Power Rectifier Transformers (Revision and redesignation of ANSI/IEEE C57.18-1964)
IEEE C57.19.00™-1991 (Reaff 1997) Standard General Requirements and Test Procedure for Outdoor Power Apparatus Bushings
IEEE C57.19.01™-2000 Standard Performance Characteristics and Dimensions for Outdoor Apparatus Bushings
IEEE C57.19.03™-1996 Standard Requirements, Terminology, and Test Bar Coding for Bushings for DC Applications
IEEE C57.19.100™-1995 Guide for Application of Power Apparatus Bushings
IEEE C57.21™-1990 (Reaff 1995) Standard Requirements, Terminology, and Test Code for Shunt Reactors Over 500 kVA
IEEE C57.91™-1995 Guide for Loading Mineral-Oil-Immersed Overhead and Pad-Mounted Distribution Transformers Rated 500 kVA and Less with 65° C or 55° C Average Winding Rise
IEEE C57.91-1995 Errata  
IEEE C57.91-1995 Interpretations  
IEEE C57.93™-1995 (Reaff 2001) Guide for Installation of Liquid-Immersed Power Transformers
IEEE C57.94™-1982 (Reaff 2000) Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type General Purpose Distribution and Power Transformers
IEEE C57.96™-1999 Guide for Loading Dry-Type Distribution and Power Transformers
IEEE C57.98™-1993 (Reaff 1999) Guide for Transformer Impulse Tests
IEEE C57.98-1993 Errata  
IEEE C57.100™-1999 Standard Test Procedure for Thermal Evaluation of Oil-Immersed Distribution Transformers
IEEE C57.104™-1991 Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers
IEEE C57.105™-1978 (Reaff 1999) Guide for Application of Transformer Connections in Three-Phase Distribution Systems
Approved Draft IEEE PC57.106™-2002 IEEE Guide for Acceptance and Maintenance of Insulating Oil in Equipment
IEEE C57.109™-1993 (Reaff 2000) Guide for Liquid-Immersed Transformer Through-Fault-Current Duration
IEEE C57.110™-1998 Recommended Practice for Establishing Transformer Capability When Supplying Non-sinusoidal Load Currents
IEEE C57.110-1998 Errata  
IEEE C57.111™-1989 (Reaff 1995) Guide for Acceptance of Silicone Insulating Fluid and Its Maintenance in Transformers
IEEE C57.111-1989 Interpretation  
IEEE C57.113™-1991 Guide for Partial Discharge Measurement in Liquid-Filled Power Transformers and Shunt Reactors
IEEE C57.116™-1989 (Reaff 2000) Guide for Transformers Directly Connected to Generators
IEEE C57.117™-1986 (Reaff 1998) Guide for Reporting Failure Data for Power Transformers and Shunt Reactors on Electric Utility Power Systems
IEEE C57.119™-2001 Performing Temperature Rise Tests on Oil-Immersed Power Transformers at Loads Beyond Nameplate Ratings
IEEE C57.120™-1991 (R2000) IEEE Loss Evaluation Guide for Power Transformers and Reactors
IEEE C57.121™-1998 Guide for Acceptance and Maintenance of Less Flammable Hydrocarbon Fluid in Transformers Approved Draft IEEE PC57.123™-2002, Guide for Transformer Loss Measurements
IEEE C57.124™-1991 (Reaff 2002) Recommended Practice for the Detection of Partial Discharge and the Measurement of Apparent Charge in Dry -Type Transformers
IEEE C57.125™-1991 (Reaff 1998) Guide for Failure Investigation, Documentation, and Analysis for Power Transformers and Shunt Reactors
IEEE C57.127™-2000 Trial-Use Guide for the Detection of Acoustic Emissions from Partial Discharges in Oil-Immersed Power Transformers
IEEE C57.129™-1999 General Requirements and Test Code for Oil-Immersed HVDC Converter Transformers
IEEE C57.131™-1995 Guide for the Application of Metal Oxide Sure Arresters for AC Systems
IEEE Std C57.134™-2000 Guide for Determination of Hottest Spot Temperature in Dry Type Transformers
IEEE Std C57.135™-2001 IEEE Guide for the Application, Specification, and Testing of .Phase-Shifting Transformers
IEEE Std C57.136™-2000 IEEE Guide for Sound Level Abatement and Determination for Liquid-Immersed Power Transformers and Shunt Reactors Rated Over 500 kVA
IEEE C57.138™-1998 Recommended Practice for Routine Impulse Test for Distribution Transformers