Abstract
Partial discharge resistance was compared between newly developed polyetherimide insulating paper and conventional aramid insulating paper. Effects of water absorption on dielectric properties were also compared. The time to breakdown via partial discharges observed for the polyetherimide paper by applying a constant voltage was found to be about twice as long as that observed for the aramid paper, while the partial discharge charge amount per unit time is similar in the two papers. Moreover, the average area of degraded portions induced by partial discharges is smaller in the polyetherimide paper than in the aramid paper. The polyetherimide paper absorbs less water than does the aramid paper, when they are immersed in water at 27 and 80?C for the same period. Because of this, complex permittivity and conductivity increase more significantly in the aramid paper than in the polyetherimide paper. Therefore, especially in a humid condition, the polyetherimide paper is superior to the aramid paper.
| Original language | English |
|---|---|
| Pages (from-to) | 51-56 |
| Number of pages | 6 |
| Journal | IEEJ Transactions on Fundamentals and Materials |
| Volume | 133 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2013 |
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Keywords
- Aramid
- Complex permittivity
- Conductivity
- Insulating paper
- Partial discharge
- Polyetherimide
ASJC Scopus subject areas
- Electrical and Electronic Engineering
Cite this
Comparisons of partial discharge resistance and dielectric properties after water absorption between polyetherimide and aramid insulating papers. / Katayama, Jun; Ohki, Yoshimichi.
In: IEEJ Transactions on Fundamentals and Materials, Vol. 133, No. 2, 2013, p. 51-56.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Comparisons of partial discharge resistance and dielectric properties after water absorption between polyetherimide and aramid insulating papers
AU - Katayama, Jun
AU - Ohki, Yoshimichi
PY - 2013
Y1 - 2013
N2 - Partial discharge resistance was compared between newly developed polyetherimide insulating paper and conventional aramid insulating paper. Effects of water absorption on dielectric properties were also compared. The time to breakdown via partial discharges observed for the polyetherimide paper by applying a constant voltage was found to be about twice as long as that observed for the aramid paper, while the partial discharge charge amount per unit time is similar in the two papers. Moreover, the average area of degraded portions induced by partial discharges is smaller in the polyetherimide paper than in the aramid paper. The polyetherimide paper absorbs less water than does the aramid paper, when they are immersed in water at 27 and 80?C for the same period. Because of this, complex permittivity and conductivity increase more significantly in the aramid paper than in the polyetherimide paper. Therefore, especially in a humid condition, the polyetherimide paper is superior to the aramid paper.
AB - Partial discharge resistance was compared between newly developed polyetherimide insulating paper and conventional aramid insulating paper. Effects of water absorption on dielectric properties were also compared. The time to breakdown via partial discharges observed for the polyetherimide paper by applying a constant voltage was found to be about twice as long as that observed for the aramid paper, while the partial discharge charge amount per unit time is similar in the two papers. Moreover, the average area of degraded portions induced by partial discharges is smaller in the polyetherimide paper than in the aramid paper. The polyetherimide paper absorbs less water than does the aramid paper, when they are immersed in water at 27 and 80?C for the same period. Because of this, complex permittivity and conductivity increase more significantly in the aramid paper than in the polyetherimide paper. Therefore, especially in a humid condition, the polyetherimide paper is superior to the aramid paper.
KW - Aramid
KW - Complex permittivity
KW - Conductivity
KW - Insulating paper
KW - Partial discharge
KW - Polyetherimide
UR - http://www.scopus.com/inward/record.url?scp=84874138270&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84874138270&partnerID=8YFLogxK
U2 - 10.1541/ieejfms.133.51
DO - 10.1541/ieejfms.133.51
M3 - Article
VL - 133
SP - 51
EP - 56
JO - IEEJ Transactions on Fundamentals and Materials
JF - IEEJ Transactions on Fundamentals and Materials
SN - 0385-4205
IS - 2
ER -