Breakdown characteristics and optically visible discharge paths of surface flashover
Characteristics of surface flashover in the presence of different dielectric materials have been investigated. Lightning voltage impulses (1.2/50 μs) have been applied to a rod-plane gap of 250 mm, bridged by cylindrical solid dielectrics with circular cross-section of 10 mm. The materials used are...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
IEEE
2012
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/40506/1/Breakdown%20characteristics%20and%20optically%20visible%20discharge%20paths%20of%20surface%20flashover.pdf http://psasir.upm.edu.my/id/eprint/40506/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Characteristics of surface flashover in the presence of different dielectric materials have been investigated. Lightning voltage impulses (1.2/50 μs) have been applied to a rod-plane gap of 250 mm, bridged by cylindrical solid dielectrics with circular cross-section of 10 mm. The materials used are polythene, polymethyl methacrylate (PMMA), and polyvinyl chloride (PVC). The characteristics of breakdown are compared with those pertinent to a similar rod-plane air gap. In each case, 50% breakdown voltage was found for both polarities. Then for each material 10 impulses were applied at 100% breakdown voltage for each polarity. The results show that there are three different types of paths taken by the discharges; they are the discharges that leap out of the rod at the HV triple junction (type-A), those follow the surface for a certain length and then leap out of the surface (type-B) and those entirely follow the surface (type-C). |
|---|