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http://dx.doi.org/10.5207/JIEIE.2014.28.10.075

A study of Insulation Diagnosis for Large-Capacity Mold Transformer  

Lee, Eun-Chun (Korea Water Resources Corporation)
Kim, Jae-Chul (Soongsil Univ. Dept. of Electrical Engineering)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.28, no.10, 2014 , pp. 75-81 More about this Journal
Abstract
When the large-capacity Mold type Transformer was passed through rain, after it was dried and it's parts were changed, Insulation Diagnosis was made to evaluate the condition of it and decide to recharge. Using the evaluation of Insulation Diagnosis, the urgent decision-making for recharge made blackout time minimum. In this study, it was considered that Insulation Diagnosis for the large-capacity Mold type Transformer is applied to decision-making for reuse of high voltage electric power equipment by analysis of the case study.
Keywords
Mold type Transformer; Insulation; Winding Resistance; P.I Test; $Tan{\delta}$; Partial Discharge;
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  • Reference
1 IEEE Std 62-1995, "IEEE Guide for Diagnostic Field Testing of Electric Power Apparatus-Part I".
2 IEEJ Technical Report No.752-2000, Chapter 1.8 Mold type Transformer.
3 IEEE Std 43-2000, IEEE Recommended Practice for Testing Insulation Resistance of Rotating Machinery 2000.3.
4 IEEE Std C57.12.91-1995, "IEEE Standard Test Code for Dry-Type Distribution and Power Transformers".
5 IEC 60076-11:Power transformers-Part11:Dry-type transformers.
6 Electrotechnical Regulation & Conformity Criteria KEA, 2014.
7 High voltage Diagnosis on the electric power equipment K-water, 1990.