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Hajime Urai
Observed names:
H Urai,
H. Urai,
Hajime URAI,
Hajime Urai S. Maeyama,
URAI, Hajime,
Urai, Hajime
show all 6
Institution:
Toyo University
Observed institutions:
Tokyo Institute of Technology,
Toyo University,
Kyushu Institute of Technology,
Daido University,
Hitachi (Japan),
Saitama University
show all 6
ORCID:
0000-0003-1608-5136
Observed ORCID:
0000-0003-1608-5136
OpenAlex ID:
A5058975965
Measurement of gas temperature in self‐blast chamber of model gas circuit breaker at high current interruption
2018
·
Hideyuki Kotsuji
, Hajime Urai
, et al.
·
IEEJ Transactions on Electrical and Electronic Engineering
·
11
Effect of Axial Magnetic Fields on Electrical Characteristics of Low-Pressure Wire Discharge
1994
·
Hajime Urai S. Maeyama
, Hiroyuki Yasui Hiroyuki Yasui
, et al.
·
Japanese Journal of Applied Physics
·
10
Method of Evaluating Dielectric Interruption Capability of High-Voltage Circuit Breaker
2022
·
Masanao Terada
, Hajime Urai
, et al.
·
IEEE Transactions on Power Delivery
·
9
Development of partial discharge detection and diagnostic methods of vacuum circuit breaker
2014
·
T. Nakaoka
, Y. Tai
, et al.
·
International Symposium on Discharges and Electrical Insulation in Vacuum
·
9
Investigation on Pressure Build-Up and Blowing Processes by Multipoint Pressure Measurement and Fluid Analysis for Self-Blast-Type High-Voltage Circuit Breaker
2021
·
Hideyuki Kotsuji
, Toshiaki Sakuyama
, et al.
·
IEEE Transactions on Plasma Science
·
8
Predominant reaction products and dielectric breakdown properties of gas mixtures consisting of SF 6 and ablation products of C 2 F 4 /BN in the temperature range of 300–3000 K
2021
·
Y Yokomizu
, M Terada
, et al.
·
Journal of Physics D Applied Physics
·
8
Comparison of measurement and numerical calculation on spectral profile of ablation arc plasma around current zero in high-voltage gas circuit breakers
2023
·
Toshiaki Sakuyama
, Hiroyuki Kobayashi
, et al.
·
Journal of Physics D Applied Physics
·
7
PDF
Investigation of Discharge Propagation in Localized High-Temperature SF6 Gas With Breakdown Voltage Measurement
2023
·
Hideyuki Kotsuji
, Mami Kuroda
, et al.
·
IEEE Transactions on Plasma Science
·
7
Critical Electric-Field Strength of High-Temperature SF6 Mixture Gas with Ablated PTFE/BN Vapor at Temperatures of 300–4000 K
2019
·
Tatsuya Ishii
, Masanao Terada
, et al.
·
International Conference on Electric Power Equipment – Switching Technology
·
7
Method of Evaluating Exhaust Characteristics of High-Voltage Circuit Breaker
2019
·
Masanao Terada
, Hajime Urai
, et al.
·
IEEE Transactions on Power Delivery
·
7
Evaluation of Thermal Interruption Capability in SF6 Gas Circuit Breakers with Re-ignition Voltage and its Application to Experimental Design
2012
·
Hajime Urai
, Youichi Ooshita
, et al.
·
IEEJ Transactions on Power and Energy
·
7
Interrupter Size Effect of High‐Voltage Gas Circuit Breaker on Thermal Interruption Performance and Current Zero Properties
2020
·
Toshiaki Sakuyama
, Hideyuki Kotsuji
, et al.
·
IEEJ Transactions on Electrical and Electronic Engineering
·
6
Development of a circuit breaker system using a linear motor with opposite magnetic poles
2022
·
Yasuaki Aoyama
, Yu Hasegawa
, et al.
·
Electrical Engineering in Japan
·
5
Development of diagnostic methods for vacuum leakage from vacuum interrupter by partial discharge detection
2016
·
Shusei Yokomichi
, Masahiro Kozako
, et al.
·
International Symposium on Discharges and Electrical Insulation in Vacuum
·
5
Construction of measurement system of PD phenomena in medium vacuum region of vacuum interrupter
2014
·
M. Kamarol
, Y. Tai
, et al.
·
International Symposium on Discharges and Electrical Insulation in Vacuum
·
5
High-repetition-rate operation of the wire ion plasma source using a novel method
1997
·
Hajime Urai
, Tadashi Kurosawa
, et al.
·
Review of Scientific Instruments
·
5
Experimental Analysis of Degradation in Insulation Performance After Arc-Preconditioning in High-Voltage Circuit Breaker
2022
·
Hideyuki Kotsuji
, Masanao Terada
, et al.
·
IEEE Transactions on Dielectrics and Electrical Insulation
·
4
Arc and Fluid Dynamics Simulation for High-Voltage Circuit Breakers as a Design Tool
2021
·
Hajime Urai
, Naoki Osawa
, et al.
·
IEEJ Transactions on Power and Energy
·
4
Optical Emission Spectroscopy in Self-Blast Gas Circuit Breaker at Large Current Condition
2019
·
Hiroyuki Kobayashi
, Tatehito Usui
, et al.
·
IEEE Transactions on Plasma Science
·
4
Evaluation of Dielectric Interruption Performance in Gas Circuit Breaker with Ablated PTFE/BN Vapor
2019
·
Mami Kuroda
, Hajime Urai
, et al.
·
International Conference on Electric Power Equipment – Switching Technology
·
4
Electrical characteristics of a low pressure wire discharge and an application to high current density electron gun
1995
·
Hiroyuki Yasui
, Tohru Tamagawa
, et al.
·
Radiation Physics and Chemistry
·
4
Analytical Consideration of Electron Avalanche in High-temperature SF6 Gas with Two Regions of Different Temperature and Pressure
2021
·
Mami Kuroda
, Tatsuya Ishii
, et al.
·
IEEJ Transactions on Power and Energy
·
3
Ring-Shaped Capacitive Probes for Determination of Spatial Arc Voltage Distribution in High-Voltage Circuit Breaker Model
2017
·
Koichiro Adachi
, Toshiaki Sakuyama
, et al.
·
IEEE Transactions on Plasma Science
·
3
Measurement of hot gas exhaust characteristics in SF6 circuit breaker with small model interrupter
2013
·
Hajime Urai
, Makoto Koizumi
, et al.
·
International Conference on Electric Power Equipment – Switching Technology
·
3
Estimation of interruption performance in high-voltage circuit breakers with a modified method for arc parameter evaluation
2011
·
Hajime Urai
, Youichi Ooshita
, et al.
·
International Conference on Electric Power Equipment – Switching Technology
·
3
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Works count:
67
Citation count:
165
H-index:
7
I10-index:
2
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