IEEE Std. IEEE Standard Requirements for C57 Power Transformers

Developed by the Institute of Electrical and Electronics Engineers (IEEE), IEEE Std. The C57 standard is a wide range of standards consisting of many sub-standards.

Some of the most commonly referenced standards among these standards are:

• IEEE C57.12.00 General requirements for liquid immersed distribution, power and regulating transformers. This standard specifies the electrical and mechanical properties of single-phase and multi-phase liquid-immersed distribution and power transformers and autotransformers and regulating transformers with a voltage of 601 Volts or higher on the highest voltage winding.
• IEEE C57.12.01 Dry type distribution and power transformers. This standard defines the electrical and mechanical properties of single and multi-phase ventilated, non-ventilated and sealed dry-type distribution and power transformers or auto-transformers with a voltage of 601 Volts or higher on the highest voltage winding.
• IEEE C57.12.10 Liquid-immersed power transformers. This standard describes the requirements for power transformer application. This standard is intended to be used as a basis for the performance, interchangeability and safety of the equipment covered and to assist in the correct selection of this equipment.
• IEEE C57.12.20 500 kVA and smaller overhead distribution transformers. The scope of this standard is for single and three phase, 60 Hz, liquid immersed, self-cooled, overhead distribution transformers 500 kVA and smaller, high voltage 34500 V and below and low specific electrical, dimensional and mechanical properties and safety specifications 7970/13 800Y Voltages V and below are not included.
• IEEE C57.12.60 Thermal evaluation of insulation systems for dry-type power and distribution transformers. This standard describes a test procedure for the thermal evaluation of insulation systems of dry-type power and distribution transformers. This test procedure is used to determine the temperature classification and modification of insulation systems.
• IEEE C57.12.90 Liquid-immersed distribution, power and regulating transformers. This standard describes the methods for performing the tests specified in the IEEE C57.12.00 standard and other standards applicable to liquid immersed distribution, power and regulating transformers.
• IEEE C57.18.10 Semiconductor power rectifier transformers. This standard describes the applications and requirements for semiconductor power rectifier transformers for special loads rated at 100 kW and higher for single-phase and for three phases of 100 kW and higher.

IEEE Std. A few other standards that fall into the C57 set of standards are:

• IEEE C57.12.23 Underwater, single-phase transformers
• IEEE C57.12.24 Underwater, three-phase transformers
• IEEE C57.12.28 Pad-mounted equipment, enclosure integrity
• IEEE C57.12.29 Pad-mounted equipment, enclosure integrity for coastal environments
• IEEE C57.12.30 Pole mounted equipment, enclosure integrity for coastal environments
• IEEE C57.12.31 Pole mounted equipment, enclosure integrity
• IEEE C57.12.32 Underwater equipment, enclosure integrity
• IEEE C57.12.34 Buffered, split type, self-cooled, three-phase distribution transformers
• IEEE C57.12.35 Distribution transformers and step-up voltage regulators
• IEEE C57.12.36 Liquid immersed distribution substation transformers
• IEEE C57.12.37 Electronic reporting of distribution transformer test data
• IEEE C57.12.38 Pad type, self-cooled, single-phase distribution transformers
• IEEE C57.12.40 Network, three-phase transformers
• IEEE C57.12.44 Secondary network protectors
• IEEE C57.12.51 Mechanical interchangeability of vented dry-type transformers
• IEEE C57.12.52 Sealed dry-type power transformers
• IEEE C57.12.58 Transient voltage analysis of dry type transformer coil
• IEEE C57.12.59 Dry type transformer transition current time
• IEEE C57.12.70 Standard terminal markings and connections for distribution and power transformers
• IEEE C57.12.80 IEEE standard terminology for power and distribution transformers
• IEEE C57.12.91 Dry type distribution and power transformers
• IEEE C57.13 Instrument transformers
• IEEE C57.13.1 Field test of Relay Current transformers
• IEEE C57.13.2 Conformity test procedure for instrument transformers
• IEEE C57.13.3 Grounding of instrument transformer secondary circuits and cases
• Instrument transformers with rated system voltage of 57.13.5 kV and above IEEE C115
• IEEE C57.16 Dry type air core series connected reactors
• IEEE C57.17 Arc furnace transformers
• IEEE C57.19.00 Outdoor power apparatus bushings
• IEEE C57.19.01 Power transformer and reactor bushings
• Application of IEEE C57.19.100 Power apparatus bushings
• IEEE C57.21 Shunt reactors above 500 kVA
• IEEE C57.32 Neutral grounding devices
• IEEE C57.91 Loading of mineral oil-immersed transformers and step-up voltage regulators
• IEEE C57.93 Installation and maintenance of liquid-immersed power transformers
• IEEE C57.94 Installation, application, operation and maintenance of dry type distribution and power transformers
• IEEE C57.96 Installing dry-type distribution and power transformers
• IEEE C57.98 Transformer impact tests
• IEEE C57.100 Thermal evaluation of insulation systems for liquid immersed distribution and power transformers
• IEEE C57.104 Interpretation of gases produced in mineral oil-immersed transformers
• Application of IEEE C57.105 Transformer connections in three-phase electrical systems
• IEEE C57.106 Acceptance and maintenance of insulating mineral oils in electrical equipment
• IEEE C57.109 Liquid-immersed transformers during fault-current time
• IEEE C57.110 Establishment of liquid immersed and dry type power and distribution transformer capability in providing non-sinusoidal load currents
• IEEE C57.111 Silicone insulating fluid acceptance and maintenance in transformers
• IEEE C57.113 Partial discharge measurement in liquid-filled power transformers and shunt reactors
• IEEE C57.114 IEEE seismic guide for power transformers and reactors
• IEEE C57.115 Loading mineral oil immersed power transformers
• IEEE C57.116 Transformers directly connected to generators
• IEEE C57.117 Reporting of fault data for power transformers and shunt reactors in electrical grid power systems
• IEEE C57.119 Performing temperature rise tests on liquid immersed power transformers at loads beyond label ratings
• IEEE C57.120 Loss assessment of distribution and power transformers and reactors
• IEEE C57.121 Acceptance and maintenance of less flammable hydrocarbon liquid in transformers

IEEE Std. The C57 set of standards is not limited to these.

Our organization, with its trained and expert staff and advanced technological equipment, among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, IEEE Std. It also provides testing services within the scope of the C57 series of standards.