Optimize Transformer Insulation Systems: A Q&A with Brad …
Jun 18, 2024 · Three key concepts that can improve the design of liquid-immersed core form power transformers are: – Milled spacers. – Calendered crepe conductor insulation. – Low-density pressboard barriers. Q2. Explain the benefits of milled spacers as a substitute for un-milled board.
Surface treeing on pressboard barriers in synthetic and natural …
Abstract: This paper reports experimental investigations on pressboard surface treeing processes and the accompanying creepage discharge patterns. With the help of fast digital video recorder, wideband discharge current sampling resistor and commercial PD detector, it is found that the liquid impregnated pressboard as composite insulation is ...
Experiment and Simulation of Pressboard Barrier Effect on the …
The barrier effect of the pressboard, the distribution of space electric field affected by the pressboard barrier, and the image force of charge on the pressboard surface are all critical factors for affecting the propagation and branching of the streamer.
Surface treeing on pressboard barriers in synthetic and natural …
Jun 1, 2011 · This paper reports experimental investigations on pressboard surface treeing processes and the accompanying creepage discharge patterns.
Comparison of negative streamer development in synthetic ester …
Sep 1, 2023 · In case of synthetic ester the barrier reduces the propagation velocity of the streamers. This article presents the results of the studies on development of negative streamers in synthetic ester and mineral oil with electrode system using a pressboard barrier.
Comparison of negative streamer development in synthetic ester …
Sep 1, 2023 · The results showed that the pressboard barrier for both liquids tested prevents breakdown. In addition, the barrier causes reduction of the propagation velocity of the streamers in synthetic ester, which is benefit in relation to the results concerning free liquid gaps.
Creepage discharge on pressboards in synthetic and natural ester ...
Mar 1, 2013 · This study reports experimental studies of creepage discharges on the pressboard (PB) surface in esters under ac divergent electric field.
Partial Discharge Characteristics on Pressboard Surface Under …
This paper researches the partial discharge (PD) characteristics on oil-pressboard interface under different DC polarities. The surface change of pressboard was caught by the high-speed camera, the characteristics of PD were sampled by the commercial PD detector.
Creepage discharge on pressboards in synthetic and natural ester ...
May 27, 2013 · This paper presents experimental research of creepage discharge on insulation barriers in power transformers. Using point-to-plate electrode configurations under AC voltages creepage discharge is … Expand
Characteristics of Negative Streamer Development in Ester ... - MDPI
Apr 11, 2018 · This article presents the results of the studies on negative streamer propagation in a point-to-sphere electrode system with a pressboard barrier placed between them.
- Some results have been removed