Inactive-Reserved Standard

IEEE 1538a-2015

IEEE Guide for Determination of Maximum Winding-Temperature Rise in Liquid Immersed Transformers -- Amendment 1

The clause that addresses direct measurement with fiber-optic detectors is expanded and an annex detailing examples of installation techniques for fiber-optic probes is added in this amendment.

Sponsor Committee
PE/TR - Transformers
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Inactive-Reserved Standard
PAR Approval
Board Approval
Inactivated Date:

Working Group Details

IEEE Power and Energy Society
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Sponsor Committee
PE/TR - Transformers
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Working Group
InsLife-WG1538 - Insulating Life - Max. Wdg Temp Rise Working Group
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IEEE Program Manager
Malia Zaman
Working Group Chair
Scott Digby


Guide for Determination of Maximum Winding Temperature Rise in Liquid-Immersed Transformers

Produce a guide for developing mathematical models and test procedures to determine the steady state maximum (hottest spot) and average winding temperature rise over ambient for liquid immersed distribution, power, network, and regulating transformers manufactured in accordance with IEEE C57.12.00.

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No Active Standards
No Superseded Standards
No Inactive-Withdrawn Standards


IEEE Guide for Determination of Maximum Winding Temperature Rise in Liquid-Filled Transformers

Provides guidance for determining the hottest-spot temperature in distribution and power transformers built in accordance with IEEE Std C57.12.00-2000. Describes the important criteriato be evaluated by any thermal model that can accurately predict the hottest-spot temperature in atransformer. Provides guidance for performing temperature-rise tests with direct measurement of the hottest-spot temperatures, and explains the importance of developing an accurate thermal model to properly locate the temperature sensors.

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