Results 61 to 70 of about 13,024 (250)

Protective circuit of the spark gap type [PDF]

, 1969
Spark gap type protective circuit for fast sensing and removal of overvoltage ...
Camacho, S. L.
core   +1 more source

Impact of maximum back-EMF limits on the performance characteristics of interior permanent magnet synchronous machines [PDF]

, 2006
Interior permanent magnet (IPM) synchronous machines are vulnerable to uncontrolled generator (UCG) faults at high speed that can damage the inverter. One approach to reducing this risk is to impose limits on the maximum machine back-EMF voltage at top ...
Aydin, M., Guven, M., Han, S., Jahns, T., Soong, W.   +4 more
core   +1 more source

The Influence of Ni2O3 Doping Concentration on the Alternating Current Aging Characteristics of ZnO Varistor

International Journal of Ceramic Engineering &Science, Volume 8, Issue 1, January 2026.
ABSTRACT When the surge arrester is subjected to the working voltage for an extended period, it undergoes alternating current (AC) aging, which degrades the arrester's parameters and affects the safety of the power grid. Ni2O3 is an important additive in the ZnO varistor formulation, and its doping ratio significantly influences the performance of the ...
Lei Wang, Jian Zhang, Wenbo Yu, Lu Li, Xin Cheng   +4 more
wiley   +1 more source

Computational Model and Experimental Validation of the Influence of Grain‐Boundary Parameters on the Electrical Performance of Arrester Varistor

International Journal of Ceramic Engineering &Science, Volume 8, Issue 1, January 2026.
This paper presents a calculation model for the nonlinear characteristics of varistors based on a basic conductive mechanism, and it has been verified through experiments. The mechanism of the barrier's effect on electrical performance has been obtained.
Zhengzheng Fu, Zongxi Zhang, Songhai Fan, Tao Cui, Donghui Luo, Pengfei Meng, Yue Yin, Jingke Guo   +7 more
wiley   +1 more source

Fundamental Understanding of the Origin of Voltage Hysteresis and the Modification Strategy Towards the Development of Advanced Li/Na‐Ion Batteries

Carbon Neutralization, Volume 5, Issue 1, January 2026.
This review summarizes the factors contributing to voltage hysteresis in Li/Na‐ion batteries, such as transition metal migration, anion redox reactions, and incomplete cation redox reactions. It also outlines corresponding modification strategies, including ion doping, surface engineering, and heterojunction formation.
Dianwu Kang, Tao Wang, Shuai Tong, Wenbo Li, Chao Zhu, Tianshu Yang, Zhijiang Zhou, Jianxin Yang, Xin Guo, Min Jia, Xiaoyu Zhang   +10 more
wiley   +1 more source

ELECTRIC STRENGTH OF ARRESTER FOR LIGHTING SHIELDING OF 6-35 KV TRANSMMCSION LINE WITH LIGHTNING OVERVOLTAGE

Записки Горного института, 2018
The most common device for protection against overvoltages is a valve-type arrester. Due to obsolescence it is proposed to replace valve-type arresters with nonlinear overvoltage limiters or multi-chamber arresters.
R. A. Bel'skii, V. Ya. Frolov, G. V. Podporkin   +2 more
doaj   +1 more source

Integrated Design of 12 kV Intelligent Ring Main Unit With Multi‐Model Fusion and Fault Diagnosis Method

Engineering Reports, Volume 8, Issue 1, January 2026.
This article proposes an integrated design method for a 12 kV intelligent ring main unit and constructs a fault diagnosis and isolation model. Firstly, building an integrated hardware platform can significantly improve perception speed and fusion potential.
Rongrong Shan, Jieyun Qiu, Dong Han
wiley   +1 more source

Automatic detection device for mining intrinsic safety power supply based on PWM

Meikuang Anquan
Aiming at the problems of cumbersome factory inspection steps, low inspection efficiency, and poor consistency of protection parameter measurement results for intrinsically safe power supplies used in mining, a high-precision fully automatic factory ...
Dedong ZOU
doaj   +1 more source

Analysis of Overvoltages Appearing in One-Sidedly Ungrounded MV Power Cable Screen

Energies, 2020
Changing the connection type of a medium voltage (MV) cable screen is linked to a decrease in power loss, although it may also lead to the generation of overvoltage in a metallic cable screen, which is hazardous for proper cable line work. In this paper,
Aleksandra Schött-Szymczak, Krzysztof Walczak   +1 more
doaj   +1 more source

DC fault isolation study of bidirectional dual active bridge DC/DC converter for DC transmission grid application [PDF]

, 2015
Fast isolation and detection of DC faults is currently a limiting factor in high power DC transmission grid development. Recent research has shown that the role of DC/DC converters is becoming increasingly important in solving various DC grid challenges ...
Aboushady, Ahmed A., Ahmed, Khaled H., Harrye, Yasen A.   +2 more
core   +2 more sources