IEEE C57.100-1986

IEEE C57.100-1986 IEEE Standard Test Procedure for Thermal Evaluation of Oil-Immersed Distribution Transformers
standard by IEEE, 09/15/1986

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Full Description

Scope

This test procedure is intended to give a direct evaluation of the composite insulation system of an oil-immerseddistribution transformer, tested as an integral unit. It is to be noted that the oil in which the transformer is immersed is to be considered a part of the insulation system.It is intent of the procedure to provide that each component of the insulation structure operate during the test underconditions that are, as nearly as possible, the same as those that it would encounter in service. Thus, it is intended that each component be evaluated in accordance with its actual function.

Purpose

The object of this test procedure is to establish a uniform method for investigating the effect of operating temperature on the life expectancy of oil-immersed distribution transformers. The results may be used, for example, to:1) Provide data for selection of a limiting hottest-spot temperature for rating purposes, which will provide reasonable life expectancy under normal operating conditions2) Provide data that may serve as the basis of a guide for loading3) Permit the comparative evaluation of a proposed insulation system, with reference to a system that has proven to be acceptable in service

Abstract

New IEEE Standard - Superseded.The object of this test procedure is to establish a uniform method for investigating the effect of operating temperature on the life expectancy of oil-immersed distribution transformers. It is intended to give a direct evaluation of the composite insulation system of an oil-immersed distribution transformer, tested as an integral unit. It is to be noted that the oil in which the transformer is immersed is to be considered a part of the insulation system. It is the intent of the procedure to provide that each component of the insulation structure operate during the test under conditions that are, as nearly as possible, the same as those that it would encounter in service. Thus, it is intended that each component be evaluated in accordance with its actual function.