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IEEE C57.100
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IEEE C57.100 2011 Edition, December 7, 2011 Test Procedure for Thermal Evaluation of Insulation Systems for Liquid-Immersed Distribution and Power Transformers
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Description / Abstract:
This standard applies to the insulation systems used in all
liquid-immersed distribution and power transformers. This standard
provides test procedures to evaluate the thermal aging
characteristics of insulation systems used in liquid-immersed
distribution or power transformers. The dielectric liquid is part
of the insulation system.
Purpose
The objective of this test procedure is to establish uniform methods for investigating the effects of operating temperature on the life expectancy of liquid-immersed transformer insulation systems. The results of these test procedures are expected to
a) Provide the basis for the selection of a limiting hottest-spot temperature for rating purposes
b) Provide life curves that may serve as the basis for a guide for loading
c) Permit the comparative evaluation of a proposed insulation system with reference to an industryproven system that has been shown to be acceptable in service
Purpose
The objective of this test procedure is to establish uniform methods for investigating the effects of operating temperature on the life expectancy of liquid-immersed transformer insulation systems. The results of these test procedures are expected to
a) Provide the basis for the selection of a limiting hottest-spot temperature for rating purposes
b) Provide life curves that may serve as the basis for a guide for loading
c) Permit the comparative evaluation of a proposed insulation system with reference to an industryproven system that has been shown to be acceptable in service