IEEE C57.100-2022

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IEEE Standard for Test Procedure for Thermal Evaluation of Insulation Systems for Liquid-Immersed Distribution, Power, and Regulating Transformers (Published)

Published By	Publication Date	Number of Pages
IEEE	2022	64

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Description

Revision Standard – Active. A series of test procedures to provide uniform methods for investigating the effects of operating temperature on the life expectancy of liquid-immersed transformers or insulation systems 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.

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PDF Pages	PDF Title
1	IEEE Std C57.100™-2022 Front cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
8	Participants
10	Introduction
11	Contents
12	1. Overview 1.1 Scope 1.2 Purpose 1.3 Word usage
13	2. Normative references
14	3. Definitions, acronyms, and abbreviations 3.1 Definitions
16	3.2 Acronyms and abbreviations 4. Relative thermal index aging testing 4.1 General
17	4.2 Aging influences 4.3 Minimum life expectancy 4.4 Criteria for end-of-life
18	5. Sealed tube aging test 5.1 Purpose 5.2 General requirements 5.3 Test equipment
20	5.4 Test samples
22	5.5 Test sample preparation and testing
24	6. Dual-temperature sealed tube aging test 6.1 Purpose of test 6.2 General requirements 6.3 Test equipment
25	6.4 Test samples
26	6.5 Test sample preparation and testing
27	7. Three-point aging test procedure 7.1 General 7.2 Determination of end-of-life for the IPS
28	7.3 Selection of aging times and temperatures for CS
29	7.4 Analysis of the aging results
32	8. Test report
33	Annex A (normative) Distribution transformer test A.1 Test specimens A.2 Test method
35	A.3 Test report
38	Annex B (normative) Power transformer test B.1 Test specimens B.2 Test method
41	B.3 Test report
43	Annex C (normative) Modifications to an already qualified CS C.1 Purpose C.2 Modifications requiring new full three-point aging test evaluation C.3 Modifications requiring abbreviated single-point verification test evaluation
44	C.4 Modifications where additional testing is not required C.5 Abbreviated single-point verification test procedure for a modified CS
45	Annex D (normative) Standard test procedure for qualification of thermally upgraded paper D.1 Single-point sealed tube aging test procedure for qualification of thermally upgraded paper D.2 Evaluation of single-point sealed tube aging test
46	Annex E (informative) Modified aging test for use in determining the thermal class of enameled conductors used in liquid-immersed transformers E.1 Background E.2 New modified aging test method for enameled conductors in liquid-immersed transformers
54	E.3 Experimental verification of the new modified aging test and thermal index qualification method
57	Annex F (informative) Consideration of material weight ratios F.1 Examples of transformers leading to actual weight ratios in Table 3
59	F.2 Calculation of core steel surface ratio F.3 Bare copper conductor surface ratio
60	Annex G (informative) Thermal screening test G.1 Purpose G.2 Procedure
61	G.3 Other uses for the screening test
62	Annex H (informative) Bibliography
64	Back cover

Additional information

Standard Title	IEEE Standard for Test Procedure for Thermal Evaluation of Insulation Systems for Liquid-Immersed Distribution, Power, and Regulating Transformers (Published)
Published Code	IEEE
Publication Date	2022
Pages Count	64

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IEEE C57.100-2022

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