Results 41 to 50 of about 90,176 (163)

Design of Selective Leakage Protection Circuit Based on Method of Amplitude Discrimination and Phase Discriminatio

Gong-kuang zidonghua, 2010
The paper proposed a design scheme of selective leakage protection circuit based on method of amplitude discrimination and phase discrimination for electrical control equipments of fully mechanized devices of coal mine underground.The selective leakage ...
FAN Yi-long~, LI Hang~, YOU Guo-dong~
doaj  

Protecting Digital Dignitas: Highlighting Legal Protection and Responsibility in Personal Data Security Crime in Indonesia's Online Marketplace World

Mahadi, 2023
Today the development of technology is increasingly massive and gave birth to a form of intelligence called Artificial Intelligence/AI. Economic potential and threats of personal data leakage awaiting immediate investigation.
Dinda Yunisa, Adelina Mariani Sihombing, Chelsea Mutiara Putri, Nurul Hasanah   +3 more
doaj   +1 more source

METHODOLOGY FOR ASSESSING THE SECURITY OF INFORMATION PASSED THROUGH THE TECHNICAL CHANNELS OF A SPECIAL-PURPOSE INFORMATISATION OBJECT

Вестник Дагестанского государственного технического университета: Технические науки, 2020
Objectives. In order to determine the security of a special-purpose informatisation object, it is necessary to calculate the effectiveness indicators of information security (IS) measures aimed at preventing unauthorised access (UA) threats associated ...
E. A. Rogozin, D. G. Silka, O. A. Gulyaev   +2 more
doaj   +1 more source

Fault analysis of leakage protection of smart low-voltage feed switch and its reformatio

Gong-kuang zidonghua, 2013
For faults in leakage protection of smart low-voltage feed switch of Nantun Coal Mine, the paper analyzed leakage protection principle and causes of the faults, and proposed reformation schemes: increase zero sequence current by additional capacitance at
GUAN Zhen-xiang, WANG Guang-sheng, JIANG Tao, LIU Shi-gang, ZHAI Dong, FAN Xin-liu   +5 more
doaj  

Research on Active Defense System for Transformer Early Fault Based on Fiber Leakage Magnetic Field Measurement

Energies
In the early faults of transformer windings, there are obvious variation characteristics of the spatial leakage magnetic field. Taking the leakage magnetic field as the fault characteristic quantity can establish an active defense system for transformer ...
Junchao Wang, Yaqi Liu, Jian Mao, Shaoyong Liu, Zhixiang Tong, Xiangli Deng, Wenbin Tan   +6 more
doaj   +1 more source

Sharing but Protecting Content Against Internal Leakage for Organisations [PDF]

, 2008
Dishonest employees, who have privileges to obtain corporate critical information and access internal resources, cause the problem of internal leakage. Employees, who have such privileges and know from where to obtain corporate sensitive information, are far more dangerous than outsiders.
Alawneh, M, Abbadi, I
openaire   +3 more sources

Research and improvement of leakage protection system in traction motor

Journal of Measurement Science and Instrumentation, 2012
Because the leakage protection circuit in traction motor of coal mining machine is impacted by frequency converter devices,malfunctions appear frequently.This paper makes an in-depth analysis,proposes a solution of using the subtraction circuit to offset
CHEN Xia, XI Xin-bo, CHU Peng, PEI Yong-chun, YIN Jun-hua, WANG De-lan   +5 more
doaj  

Necessity Analysis on Remote Manual Leakage Tripping Test of Leakage Detection Protection Device in Underground Coal Mine

Meikuang Anquan, 2020
In order to provide theoretical support for the necessity of remote manual leakage tripping test, the distributed parameter circuit theory is applied to analyze the underground power supply system. By comparing and analyzing the AC equivalent circuit of
GUO Chunping
doaj   +1 more source

Analysis of Mine Low-voltage Leakage Protection in Situation of Great Disparity between Long and Short Lines and Big Unbalanced Current

Gong-kuang zidonghua, 2010
The paper explained that traditional leakage protection principles such as zero-sequence direction relay principle and zero-sequence current's maximum principle are unable to implement selective leakage protection in situation of great disparity between ...
SU Po, CHEN Qing
doaj   +2 more sources

Technology for leakage fault prevention and anti-override trip in coal mine intelligent power supply system and its development prospect

Meikuang Anquan
The research on leakage and anti-tripping technology of coal mine power supply system is carried out, involving two parts: high voltage power supply system and low voltage power supply system.
Jianwen ZHAO, Fuyang ZENG, Yuyang ZHAO
doaj   +1 more source