Results 41 to 50 of about 17,363 (249)
Temperature rise test and analysis of high current switchgear in distribution system
The Journal of Engineering, 2018 As the load of the power system continues to increase, the capacity of switchgear climbs, resulting in that the overheating problems becoming more serious.
Haotian Xia +7 more
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Improving the Estimation of Partial Discharge Direction Using a Four-Terminal Surface Current Sensor
Energies, 2023 To improve the insulation diagnosis of a medium-voltage (MV) switchgear, we have developed a four-terminal surface current sensor and a method to estimate the direction of partial discharge occurrence.
Yasutomo Otake, Hiroshi Murase
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Study on the Effect of Helium on the Dielectric Strength of Medium-Voltage Vacuum Interrupters
Energies, 2021 This paper presents the results of a comparative analysis of the dielectric strength of disconnecting vacuum interrupters operating on air and helium. The breakdown voltage Ud was measured in the pressure range from 8.0 × 10−4 Pa to 3.0 × 101 Pa for air ...
Paweł Węgierek +3 more
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Study on voltage characteristics of short air arc with high current density arc root
AIP Advances, 2019 In this paper, the voltage characteristics of short air arc with high average current density arc root were studied at atmospheric pressure. Cu-W electrodes with diameter of 5-14mm and gap length of 0.2-3 mm were used in the experimental study.
Tiansheng Zhu +4 more
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Research progress on photoacoustic SF6 decomposition gas sensor in gas-insulated switchgear
Journal of Applied Physics, 2022 In the power industry, sulfur hexafluoride (SF6) as an insulating gas is widely used in gas-insulated switchgears (GISs). Owing to the latent inner insulation defects of GIS, various SF6 gas decompositions are generated in the process of partial ...
Xukun Yin +7 more
semanticscholar +1 more source
The Journal of Engineering, 2019 The automatic transfer switch can solve the problem of voltage drop and instantaneous power interruption, which is one of the most reliable and economical ways to improve the reliability and quality of the power supply.
Qu Lu +5 more
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E3S Web of Conferences, 2018 The phenomenon of dampness and dewing inside the switchgear can improve the occurrence of serious equipment faults. Based on it, this paper, starting from the occurrence mechanism of dampness and dewing of the switchgear, summarizes the main techniques ...
Pan Qize +4 more
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Gong-kuang zidonghua, 2014 The paper introduced basic principle, detection and determinants of partial discharge detection method based on a combination method of ultrasound and high-frequency current.
LUO Dongsong, LU Ye
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Research on the fitting method to describe the mathematical expression of VFTO in GIS
The Journal of Engineering, 2018 Very fast transient over voltage (VFTO) is a unique electromagnetic transient phenomenon occurring in Gas Insulated Substation (GIS), which determines the insulation level of the GIS (above 330 kV).
Reem A. Almenweer, Su Yixin, Wu Xixiu
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High Voltage, 2021 As the power load increases, the capacity of switchgear becomes larger so the problem of overheating of switchgears becomes more significant. Whether the switchgears operate safely and reliably affects the reliability and economy of the entire power ...
Xiaorui Wang +7 more
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