IEEE C57.100 2012

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

Published By	Publication Date	Number of Pages
IEEE	2012	37

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Description

Revision Standard – Active. 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.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C57.100-2011 Front Cover
6	Introduction
7	Notice to users Laws and regulations Copyrights Updating of IEEE documents Errata Interpretations Patents
8	Participants
10	Contents
12	Important Notice 1. Overview 1.1 Scope 1.2 Purpose
13	2. Normative references 3. Definitions 3.1 Industry-proven insulation system
14	4. Aging influences 5. Minimum life expectancy
15	6. Criteria for end of life—Distribution transformer and power transformer model 7. Test temperatures
16	8. Test methods and specimens 8.1 Distribution transformer 8.2 Power transformer model
17	8.3 Relative testing specimens 9. Test period 9.1 Hottest spot test temperature 9.2 Temperature of liquid
18	9.3 Duration of test period 9.4 Cycling 9.5 Calculation of aging caused by heating and cooling
19	10. End-point tests 10.1 Distribution transformers 10.2 Power transformers 10.3 Abnormalities 11. Test results
20	11.1 Data presentation 11.2 Test report
21	11.3 Example calculation of life equation
22	12. Applicability of test results
24	Annex A (normative) Materials testing for aging of liquid-immersed transformer insulation A.1 Purpose A.2 Test temperatures and test periods A.2.1 Single-point sealed tube aging
25	A.2.2 Three-point aging
26	A.3 Limiting factor—insulation system A.4 Comparative evaluation A.4.1 Single point aging
27	A.4.2 Three-point aging A.4.2.1 Determination of end-of-life criteria for candidate system In this particular example, the end-of-life criteria is 21.9% retained tensile strength, which is the average of the results shown in Table A.2. A.4.2.1.1 Test program for the candidate system A.4.2.1.2 Determination of time-temperature points
29	A.4.2.1.3 Determination of the life equation
30	Annex B (normative) Materials testing—standard test procedure for sealed tube aging of liquid-immersed transformer insulation B.1 Test samples
31	Annex C (normative) Materials testing—standard test procedure for dual-temperature sealed tube aging of liquid-immersed transformer insulation C.1 Purpose C.2 Test samples
33	Annex D (informative) Historical background information D.1 Distribution transformer and power transformer model test result discussion from IEEE Std C57.100-1999 [B12] D.2 Background discussion from references
36	Annex E (informative) Bibliography

Additional information

Standard Title	IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Liquid-Immersed Distribution and Power Transformers
Published Code	IEEE
Publication Date	2012
Pages Count	37

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