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IEEE 259-1974

$28.71

IEEE Standard Test Procedure for Evaluation of Systems of Insulation for Specialty Transformers

Published By Publication Date Number of Pages
IEEE 1974
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Revision Standard – Superseded. A uniform method by which the thermal endurance of electrical insulation systems for dry-type specialty and general-purpose transformers can be compared is established. These insulation systems are intended for use in the types of transformers described in NEMA ST 1-1988 and NEMA ST 20-1992.

PDF Catalog

PDF Pages PDF Title
7 1 Scope and Introduction
2 Insulation Test Specimens
8 Table 1 Test Schedule
Test Conditions Imposed on Transformers for Different Applications
9 3 Test Cycle
10 3.1 Dielectric Proof Test
3.2 Temperature Aging
11 3.3 Mechanical Stress
12 3.4 Thermal Shock
3.5 Moisture Exposure
Suggested Electrical Proof Tests During Basic Test Cycle
4 Interpretation of Data
4.1 Criteria of Failure
Typical Test Temperatures and Corresponding Estimated Life
13 4.2 Method for Determining the Average Life
4.3 Extrapolation of Data
4.4 Applications of Results
4.5 Report of Results
5 Standards References
14 6 Bibliography
IEEE 259-1974
$28.71