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IEEE C57.12.60-2020 pdf free download

IEEE C57.12.60-2020 pdf free download.IEEE Standard for Thermal Evaluation of Insulation Systems for Dry-Type Power and Distribution Transformers.
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e.. they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.
ANSI (‘57.12.55, American National Standard ftr Transfbrmers- -Used in Unit Installations. Including Unit Substations—Conformanee Standard.”
ASTM D5374, Standard Test Methods for Forced-Convection Laboratory Ovens for Evaluation of Electrical Insulation.7
ASTM D5642, Standard Test Method for Sealed Tube Chemical Compatibility Test.
ASTM E 104. Standard Practice for Maintaining Constant Relative Humidity by Means ofAqueous Solutions.
IEEE Sid l, IEEE Standard General Principles for Temperature Limits in the Rating of Electric Equipment and for the Evaluation of Electrical lnsulation.
IEEE Std 101 TM, IEEE Guide for the Statistical Analysis of Thermal Life Test Data.
IEEE Std 259TM, IEEE Standard Test Procedure for Evaluation of Systems of Insulation for Dry-Type Specialty and General-Purpose Transformers.
IEEE Std C57.12.OITM, IEEE Standard General Requirements for Dry-Type Distribution and Power Transformers.
IEEE Sid (‘57. l2.58Th1. IEEE Guide for Conducting a Transient Voltage Analysis of a Dry-Type Transformer Coil.
IEEE Sid C57.I2.0’, IEEE Standard Terminology for Power and Distribution Transformers.
3.1 Definitions
For the purposes of this document, the following terms and definitions apply. For other terms, the standard transformer terminology in IEEE Std C57.l2.O shall apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause.
aging cycle; A measure of the time spent at a target temperature for the purpose of accelerated aging of insulation.
chemical compatibility test (CCT): Sealed tube test procedure. as defined in ASTM D5642, which is designed to evaluate the chemical compatibility of all components of an insulation system.
cold e%posure: Test specimens are exposed to cold temperatures once per aging cycle as part o[the diagnostic procedures used to evaluate the thermal capability of the tested insulation system.
correlation coefficient (R2): A measure of how well a predictive model fits the aging data from a thermal evaluation experiment.
electrical stress path: Dielectric failure paths in the representative small-scale model coils representing turn- to-turn, layer-to-layer, disk-to-disk, section-to-section. winding-to-winding, and winding-to-ground.
enhanced sealed tut)c (EST) evaluation: A sealed tube test procedure that is conducted under enhanced conditions (higher temperature, longer time) and with more detailed evaluations versus the chemical compatibility test (CCT) procedure.
full-size transformer coils: Full-sizc transformer coils capable of meeting the requirements of’ IEEE Std C57.12.Ol and passing testing per IEEE Std C57.12.91, which are selected for use as test objects in this procedure.
humidity conditioning: Humidification of the test coils as part of the diagnostic procedures used to evaluate the thermal capability olihe testing insulation system.IEEE C57.12.60-2020 pdf free download.

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