Referenced Items are not available for this document.
For rational insulation design of a UHV substation, full-scale switching impulse tests of phase-to-ground (shielding ring-to-tower) and phase-to-phase (shielding ring-to-shielding ring) insulating clearance have been carried out in dry and wet conditions. In the tests, shielding rings that will be installed on bushings at actual UHV substations were used. The sparkover voltages depend on not only gap configurations but also the waveform of applied switching impulses; in other words, they show what we refer to as U-characteristics. Critical sparkover voltages are higher than those of rod-rod gaps by 20%-25% in dry conditions and by 7%-10% in wet conditions
Published in:
Power Delivery, IEEE Transactions on
(Volume:17
,
Issue:
1
)
Date of Publication: Jan 2002
- Page(s):
- 223 - 232
- ISSN :
- 0885-8977
- INSPEC Accession Number:
- 7142503
- Digital Object Identifier :
- 10.1109/61.974211
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 07 August 2002
- Issue Date :
- Jan 2002
- Sponsored by :
- IEEE Power & Energy Society
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