Results 31 to 40 of about 22,491 (267)
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
High Voltage, 2019 High-voltage direct current circuit breakers (HVDC CB) are one of the key technologies of multi-terminal DC systems and DC grids. Different from other equipment that use a large number of power electronic devices, the HVDC CB cannot obtain its power from
Xiangyu Zhang +7 more
doaj +1 more source
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
doaj +1 more source
Logic controlled solid state switchgear [PDF]
, 1973 Logic controlled solid state circuit breakers and power transfer switches have been designed and built to demonstrate their use for 270 V dc power systems. This switchgear provides remote operation, automatic current level, and operates several orders of
Buchanan, E., Waddington, D.
core +1 more source
High Voltage, EarlyView.ABSTRACT Structural mechanics field simulation plays a critical role in the vibration characteristic analysis of electrical equipment. Existing structural field analysis of equipment based on numerical simulation faces challenges such as convergence difficulties and prolonged computational time, failing to meet the demand for real‐time prediction of ...
Wanqing Wang +6 more
wiley +1 more source
Contribution of two diagnosis tools to support interface situation during production launch [PDF]
, 2009 Organised by: Cranfield UniversityFirms are urged to constantly introduce new products. Hence, the New Product Development process should be mastered, especially its final phase, the production launch.
Alpan, G., Blanco, E., Surbier, L.
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Development of ± 550 kV DC GIS Basin Insulator
High Voltage, EarlyView.ABSTRACT The basin insulator is a core component of the insulation system for ± 550 kV gas‐insulated switchgear (GIS). This paper, using a finite element method for multi‐physics simulations of electric–thermal coupling, determines a geometry suitable for the industrial production of ± 550 kV GIS basin insulators.
Shaohua Cao +9 more
wiley +1 more source
Comparison of Dielectric Recovery After Arc Burning in SF6 Gas and Its Potential Alternatives
High Voltage, EarlyView.ABSTRACT Although sulphur hexafluoride (SF6) exhibits exceptional insulating properties, it is a potent greenhouse gas. Therefore, studying alternatives to SF6 is critical for developing environmentally friendly high‐voltage electrical equipment.
Ziqi Liu +4 more
wiley +1 more source