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Under the International Thermonuclear Experimental Reactor (ITER) project, the Japan Atomic Energy Agency (JAEA) is procuring all of the conductors for the Central Solenoid (CS). The CS consists of six vertically stacked modules. The height and outer diameter of the CS are approximately 13 m and 4 m, respectively. The CS has a circular five stage cable. All of approximately...
The power module for the electrical vehicle needs electrical insulation material with high thermal conductivity. In this paper, we investigated the compatibility between dielectric breakdown strength and thermal conduction in epoxy/boron-nitride composite, in comparison with epoxy/alumina composite. The breakdown test was carried out under the application of dc lamp voltage and impulse voltage at...
Six laboratories in Japan have performed round-robin test (RRT) on measurement of repetitive PD inception voltage (RPDIV) under well-controlled experimental condition. They used common twisted-pair sample, common impulse generator and common data sheet with normalized air pressure and temperature. Scatterings of data were small except in relative humidity. Stability of PD occurrences against repetitive...
To understand the breakdown mechanism of extremely thin Polyethylene Naphthalate (PEN) film, the conduction current and the breakdown strength (Fb) were measured using the modified method. In addition, the surface temperature and the conduction current up to the breakdown were observed. The aluminum (Al) sheets were placed between the brass electrode and the evaporated electrode on extremely this...
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