IEEE PC57.157 D6.3 July2015 DRAFT
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IEEE Draft Guide for Conducting Functional Life Tests on Switch Contacts Used in Insulating Liquid Transformers
| Published By | Publication Date | Number of Pages |
| IEEE | N/A | 25 |
New IEEE Standard – Unapproved Draft. This guide is intended for use in establishing a methodology to evaluate expected longterm performance of infrequently operated switch contacts used within insulating liquid transformers. These switch contacts are typically found in de-energized tapchangers, dual voltage switches, reversing switches, on-load tapchangers, and step voltage regulators, but the test might possibly be used to evaluate any contact that is used in insulating liquids with similar operating characteristics and within similar environments.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 10 | 1. Overview 1.1 Scope 1.2 Purpose |
| 11 | 2. Normative references 3. Definitions 4. Background |
| 12 | 4.1 Basis of 10 C Rule and application of Arrhenius relationship a) That electrical contact corrosion follows a classical Arrhenius relationship with time and temperature. b) That tests can be accelerated by temperature in theory. c) That the acceleration follows the 10ºC rule, wherein every 10ºC hotter cuts the time by half and every 10ºC lower doubles the time. d) That the Arrhenius relationship is generally linear up to temperatures as high as 300ºC, although most life testing work is generally performed at lower temperatures, like 150ºC. 4.2 Incorporation in test of IEEE Transformer Loading Guide 4.3 Incorporation in test of typical daily load cycle 4.4 Derivation of desired aging temperatures |
| 14 | 4.5 Application of specific switch characteristics to test 5. General Test Setup 5.1 Safety Considerations 5.2 Items for Test 5.2.1 Switch components |
| 15 | 5.2.2 Insulating Liquids 5.2.3 Liquid containment chamber 5.3 Monitoring locations 5.3.1 Switch components 5.3.1.1 Temperature |
| 16 | 1.1.1.1 located into the contact body in a manner that does not affect the actual contact area. 5.3.1.2 Voltages 5.3.1.3 Currents 5.3.2 Liquid 5.3.3 Other |
| 17 | 5.3.4 Example test setups 6. Test Procedure |
| 18 | 7. Test Data Recording |
| 19 | 8. Pass/Fail Criteria |
| 21 | Annex A (informative) Bibliography |
| 22 | Annex B (informative) Contact Aging Phenomenon in Insulating Liquid |
