Results 31 to 40 of about 10,924 (312)

Overvoltage Impact on Internal Insulation Systems of Transformers in Electrical Networks with Vacuum Circuit Breakers

Energies, 2020
Vacuum circuit breakers are increasingly used as switching apparatus in electric power systems. The vacuum circuit breakers (VCBs) have very good operating properties. VCBs are characterized by specific physical phenomena that affect overvoltage exposure
Marek Florkowski, Jakub Furgał, Maciej Kuniewski, Piotr Pająk   +3 more
doaj   +1 more source

Vacuum circuit breaker current-zero phenomena [PDF]

IEEE Transactions on Plasma Science, 2005
Post-arc current phenomena that occur when interrupting high currents with vacuum circuit breakers have been investigated. High resolution measuring equipment has been used to measure both the post-arc current and the arc voltage in the current-zero region. Three examples of frequently observed phenomena are described.
van Lanen, E.P.A. (author), Popov, M. (author), van der Sluis, L. (author), Smeets, R.P.P. (author)   +3 more
openaire   +2 more sources

System configuration, fault detection, location, isolation and restoration: a review on LVDC Microgrid protections [PDF]

, 2019
Low voltage direct current (LVDC) distribution has gained the significant interest of research due to the advancements in power conversion technologies. However, the use of converters has given rise to several technical issues regarding their protections
Bououden, Burt, Callavik, Dong Chen, Mitchell, Mohamed Emad Farrag, Oudalov, Waqas Javed, Wu, Xue, Yan Xu, Zhong   +11 more
core   +1 more source

A novel bidirectional nonuniform hybrid circuit breaker considering different direction protection requirements

IET Power Electronics, 2022
Hybrid switching technologies such as zero voltage switching (ZVS) and zero current switching (ZCS) are widely accepted to protect DC power systems from different kinds of faults.
Zhuangxian Jiang, Chao Guo, Chengjin Ye, Yi Ding, Xueyong Tang, Youtong Fang   +5 more
doaj   +1 more source

The Influence of Mechanical Deformation Consideration on the Results of the Calculation of the Vacuum Circuit Breaker Drive Shaft

Journal of Mechanical Engineering, 2023
One of the important directions of theoretical, computational and experimental research related to the improvement and development of new design elements of modern electrical devices, primarily medium voltage circuit breakers and contactors, is the study
Yevhen I. Baida, Mykhailo H. Panteliat, Artem O. Kuzmin   +2 more
doaj   +1 more source

DC Current Interruption Based on Vacuum Arc Impacted by Ultra-Fast Transverse Magnetic Field

Energies, 2020
In this paper, the effect of an external ultrafast transverse magnetic field (UFTMF) on a vacuum arc in the diffused mode has been studied. According to the results of studies, a novel approach for making a zero-crossing in a DC arc current has been ...
Ehsan Hashemi, Kaveh Niayesh
doaj   +1 more source

DC interruption characteristic of vacuum circuit breaker

Electrical Engineering in Japan, 2005
AbstractA high‐speed vacuum circuit breaker (HSVCB) has been investigated. HSVCB makes high‐frequency current superimposed on a fault current so that the current is forced to be zero and is interrupted. Its interruption performance is considered to be dependent on the rate of change of the current (di/dt). As a fundamental research, we investigated the
Hiromi Odaka, Masataka Yamada, Ryohei Sakuma, Cuie Ding, Eiji Kaneko, Satoru Yanabu   +5 more
openaire   +2 more sources

Transient characteristic of mode-conversion strategy for pumped storage machines based on eco-friendly generator circuit breaker and phase reversal disconnecting switch

International Journal of Electrical Power & Energy Systems
The generator circuit breaker is a special breaker located between a pumped storage machine and a step-up transformer. The first requirement for generator circuit breaker is to interrupt fault currents with delayed current zero, preventing the damage of ...
Weijie Wen, Tiewei Hu, Jinghan Fan, Bin Li, Zhihao Zhu   +4 more
doaj   +1 more source

INVESTIGATION OF MECHANICAL STRESSES IN THE DRIVE SHAFT OF MV VACUUM CIRCUIT BREAKER

Electrical engineering & Electromechanics, 2017
Introduction. In the last 10-15 years a dominant position in the market of medium voltage circuit breakers, vacuum circuit breakers have taken in which as an actuator mono- or bistable actuators with permanent magnets are used.
E. I. Baida, B. V. Klymenko
doaj   +1 more source

Online Monitoring Method for Opening and Closing Time of 10 kV Spring Energy Storage Circuit Breaker Based on Transient Electrical Signal Characteristic Point Marking and Self-Calibration

Energies
Among all circuit breaker faults, mechanical failures account for a considerable proportion, and online monitoring of their mechanical characteristics is of great practical significance.
Liting Weng, Jiangtao Xiao, Zhaochuang Zhang, Jingang Wang, Yuchuan Wen, Fan Zhang, Xingyu Zhang, Lingyi Ma, Pengcheng Zhao   +8 more
doaj   +1 more source