IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Liquid-immersed Distribution and Power Transformers


Book Description

Abstract: A test procedure to provide a uniform method for investigating the effect of operating temperature on the life expectancy of liquid-immersed transformers is provided. The test procedures are intended to provide data for the selection of a limiting hottest-spot temperature for rating purposes, provide data which may serve as the basis for a guide for loading, and permit the comparative evaluation of a proposed insulation system with reference to a system that has proven to be acceptable in service. Keywords: aging, distribution transformers, IEEE C57.100, life tests, liquid immersed, power transformers, test procedures, thermal evaluation.







Engineering Dielectric Liquid Applications


Book Description

This book is a printed edition of the Special Issue "Engineering Dielectric Liquid Applications" that was published in Energies




IEEE Standard Requirements, Terminology, and Test Code for Step-voltage Regulators


Book Description

Abstract: Description of design types, tables of 50 Hz and 60 Hz ratings, supplementary ratings, construction, and available accessories are provided. Methods for performing routine and design tests applicable to liquid-immersed single and three-phase step-voltage regulators are described. Winding resistance measurements, polarity tests, insulation power factor and resistance tests, ratio tests, no load loss and excitation current measurements, impedance and load loss measurements, dielectric tests, temperature tests, routine and design impulse tests, short-circuit tests, control tests, calculated data, and certified test data are covered. Keywords: control, design tests, position indicator, routine tests, series transformer, tap changer, Type A, Type B, voltage regulator.