Results 31 to 40 of about 7,609 (286)
Design of a mine-used low-voltage leakage protection device
Gong-kuang zidonghua, 2020 In view of low reliability of leakage protection device of coal mine low-voltage power grid based on line selection principle of zero-sequence power direction, a hardware and software design scheme of mine-used low-voltage leakage protection device was ...
ZHENG Qingle +3 more
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A novel high‐impedance neutral grounding method for medium‐ or large‐size hydroelectric generators [PDF]
IET Renewable Power GenerationAs the capacity of medium or large hydroelectric generators increases, conventional grounding methods face challenges in effectively limiting single‐phase to earth fault current and neutral displacement voltage within acceptable range.
Jianming Jiang +4 more
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A Method for Calculating Grounding Resistance of Reinforced Concrete Foundation Grounding Systems
Energies, 2022 Tower foundations have been used as grounding electrodes to reduce the area of the grounding devices. However, it is difficult to calculate the grounding resistance due to the complex structure of the reinforced concrete foundation.
Bowen Dou, Rui Liu, Youping Tu, Bo Zhang
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Frontiers in Energy Research, 2021 There is a large number of grounding switches along the isolated ground wire for the de-icing in the large-scale wind farm. If any of these grounding switches are left open by accident, this can create an unexpected abnormal grounding point in the ...
Yunlong Wang +3 more
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Study on the Influence of OVPD on Pipeline Interference [PDF]
Cailiao Baohu, 2021 A buried steel pipeline paralleled with the subway line has been seriously interfered by the metro stray current.The rail ground potential protection device inside the subway station was frequently switched on.Through synchronous monitoring of the rail ...
WANG Lei-lei, GE Cai-gang, MOU Xiao-liang, JIANG Ka-ke, LIU Guo, DU Yan-xia
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Electrical engineering & Electromechanics, 2019 Purpose. The purpose of the work is to analyze the modern methods of control and determine the most effective ones for monitoring the state of grounding of existing energy objects in operation. Methodology.
D. G. Koliushko, S. S. Rudenko
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Analysis of Propeller Hub Bolt Corrosion and Suggestions for Improvement [PDF]
Cailiao Baohu, 2021 Corrosion always occurs to propeller hub bolts of adjustable pitch propeller for one ship.This paper analyzed the causes of corrosion through the analysis means of material quality and mechanical properties and found that the shaft current was the main ...
WANG Jun-jun, KANG Jing-yuan, YAN Wen-chao
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A new type of lightning protection and grounding method for coal mine gas drainage statio
Gong-kuang zidonghua, 2014 In view of present status that current coal mine gas drainage station using independent lightning rod for direct lightning stroke protection, problems and hidden troubles of the status were analyzed, and a new type of lightning protection and grounding ...
CHEN Jinlin +3 more
doaj +1 more source
Principle of Flexible Ground-Fault Arc Suppression Device Based on Zero-Sequence Voltage Regulation
IEEE Access, 2021 Single-line-to-ground (SLG) fault arcs cause the intermittent over-voltages, leading to short circuits within large-scale area. In this paper, a flexible arc suppression device is proposed, which adopts a zigzag grounding transformer, multi-terminal ...
Bishuang Fan +6 more
doaj +1 more source
, 2008 Предложена методика оценки аналитическим путем электрических параметров двухуровневой конструкции заземлителя из кольцевых электродов. Новизну методики составляет учет произвольного расположения в грунте двух кольцевых заземлителей между собой ...
Нижевский, Виктор Ильич +1 more
core +2 more sources