IEEE C57.12.200-2022
$48.21
IEEE Guide for the Dielectric Frequency Response Measurement of Bushings (Approved Draft)
| Published By | Publication Date | Number of Pages |
| IEEE | 2022 | 84 |
New IEEE Standard – Active. Bushings are critical components for power apparatus as their main role is to conduct current at high voltage through a grounded barrier. Statistical studies have shown that bushing defects such as water ingression and partial discharge are among the most important causes for unexpected failures. Dielectric frequency response (DFR), sometimes also known as frequency domain spectroscopy (FDS), which involves measurement of the bushing capacitance and dielectric losses over a frequency range, is an effective method to detect deterioration of bushing insulation. This guide applies to the DFR measurement of various types of bushings either in the field or in the factory except for gas-insulated bushings.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | IEEE Std C57.12.200™-2022 Front cover |
| 2 | Title page |
| 4 | Important Notices and Disclaimers Concerning IEEE Standards Documents |
| 8 | Participants |
| 10 | Introduction |
| 11 | Contents |
| 12 | List of Figures |
| 15 | List of Tables |
| 16 | 1. Overview 1.1 Scope 1.2 Purpose 1.3 Word usage |
| 17 | 2. Normative references 3. Definitions, acronyms, and abbreviations 3.1 Definitions |
| 18 | 3.2 Acronyms and abbreviations |
| 19 | 4. Principle and application of the DFR measurement 4.1 Overview 4.2 Use of DFR |
| 21 | 4.3 Differences between DFR and single-frequency PF testing techniques 4.4 DFR measurement on bushings |
| 22 | 5. Safety recommendations 5.1 General safety instructions |
| 23 | 5.2 Test safety |
| 24 | 6. Best practices for DFR testing 6.1 Test object 6.2 Measuring instrument |
| 25 | 6.3 Test setup 7. Test connection 7.1 Test mode |
| 27 | 7.2 Connection from instrument to bushing |
| 30 | 8. DFR results analysis |
| 31 | 8.1 Time-based comparison 8.2 Type-based comparison |
| 32 | 8.3 Phase-based comparison 8.4 Model-based analysis |
| 33 | 8.5 Causes of abnormal DFR results |
| 34 | Annex A (informative) Theoretical basis for dielectric measurement |
| 36 | Annex B (informative) Temperature correction of DFR measurements using Arrhenius equation |
| 41 | Annex C (informative) Impact of stray currents on bushing surface |
| 44 | Annex D (informative) Impact of test voltage on DFR results D.1 DFR measurements in the factory D.2 DFR measurements in the field |
| 54 | Annex E (informative) Case studies irrelevant to moisture ingress E.1 500 kV high-voltage power transformer bushings |
| 59 | E.2 500 kV high-voltage power transformer bushings |
| 63 | E.3 110 kV high-voltage power transformer bushings |
| 67 | E.4 500 kV high-voltage power transformer bushings for in one substation |
| 72 | Annex F (informative) Case studies relevant to moisture ingress F.1 110 kV high-voltage power transformer bushings |
| 76 | F.2 500 kV high-voltage power transformer bushing in a substation |
| 80 | Annex G (informative) OIP bushings investigated by both DGA and DFR methods |
| 83 | Annex H (informative) Bibliography |
| 84 | Back cover |
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