Title :
High-field dissipation current waveforms in e-beam irradiated XLPE film superposed by DC ramp voltage
Author :
Tohyama, Kazuyuki ; Tokoro, T. ; Mitsumoto, S. ; Nagao, M. ; Kosaki, M.
Author_Institution :
Numazu Coll. of Technol., Japan
Abstract :
In order to investigate the influence of crosslinking on high field dielectric properties of polyethylene, the observations of AC dissipation current waveforms of electron beam (EB) irradiated crosslinked polyethylene (IR-XLPE) films at 90°C were carried out by using the samples with different gel fractions. The dielectric property at 90°C depends not only on the gel fraction but also on the position of film from EB irradiation side. It might be indicated that the mobile carrier in high temperature region is strongly affected by electric field, temperature and the gel fraction of IR-XLPE film. AC dissipation current waveforms under the superposition of AC and DC electric field were observed by using IR-XLPE films with different gel fractions. The dissipation current waveforms of the 20th, 30th and 40th samples from the electron beam irradiation side were strongly affected by the DC component of applied voltage, namely its polarity and magnitude
Keywords :
XLPE insulation; carrier mobility; dielectric hysteresis; dielectric losses; electron beam effects; polymer films; 90 degC; DC component; DC ramp voltage; XLPE film; crosslinking; electron-beam irradiation; gel fractions; high temperature region; high-field dissipation current waveforms; mobile carrier; Dielectrics; Educational institutions; Electric fields; Electrodes; Electron beams; Plastic films; Polyethylene; Space charge; Temperature; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1997. IEEE 1997 Annual Report., Conference on
Conference_Location :
Minneapolis, MN
Print_ISBN :
0-7803-3851-0
DOI :
10.1109/CEIDP.1997.634580
