Results 61 to 70 of about 1,832 (200)

Rating of Oil Circuit Breakers [PDF]

Transactions of the American Institute of Electrical Engineers, 1916
Paper points out several difficulties, which are encountered in the rating of actual circuit breakers, but generally favors that these ratings be on the basis of the current to be opened in the arc at the operating voltage of the system.
openaire   +2 more sources

Influence of Arc Faults on Pressure Production Characteristics in AC Turret of UHV Transformers

High Voltage, EarlyView.
ABSTRACT The overpressure caused by arc fault in the oil tank can lead to a transformer explosion. Since the AC turret of transformers serves to connect the transformer windings with the AC busbar, the arc current can be extremely high if an earth fault arc occurs leading to potentially hazardous pressure.
Yuhang Li, Yuanxiang Zhou, Guimin Jiang, Licheng Lu, Hongchuan Dong   +4 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, Hao Sun, Yi Wu, Mingzhe Rong, Zeyuan Luo   +4 more
wiley   +1 more source

800 kV Fast Circuit Breaker: Mechanical Coupling Modelling, Buffer Design and Development

High Voltage, EarlyView.
ABSTRACT The 800 kV fast circuit breaker (CB) used in ultra‐high voltage (UHV) converter transformer can reduce the total breaking time to 25 ms. It significantly improves the action speed and breaking capacity of the CB, with promising broad application prospects.
Enyuan Dong, Sheng Yin, Yu Tian, Liyan Zhang, Ruilei Gong, Kejia Xie, Zhibing Li   +6 more
wiley   +1 more source

Analysis of the Feasibility of Using Hybrid DC Circuit Breakers with Forced Switching for Parallel Connections

Energies
The use of advanced switching technologies, including hybrid and fully semiconductor-based circuit breakers, enables a significant reduction in the prospective short-circuit current. This enhances the level of circuit protection by minimizing thermal and
Łukasz Nowak, Michał Rodak, Piotr Borkowski   +2 more
doaj   +1 more source

Mechanism of Quasi‐Power‐Frequency Resonant Overvoltage Triggered by Multiple Lightning Strikes in High‐Voltage Alternating Current Systems Equipped With Shunt Reactor

High Voltage, EarlyView.
ABSTRACT This paper investigates the generation mechanism of quasi‐power‐frequency resonant overvoltage triggered by multiple lightning strikes in high‐voltage alternating current (HVAC) systems equipped with shunt reactors. Based on field measurements from a 500 kV AC system, equivalent and simplified circuit models have been established to analyse ...
Tao Liang, Tao Cui, Zhengxi Wang, Tongwei Guo, Xiaohui Wu, Hong Zeng, Jie Guo, Yanzhao Xie   +7 more
wiley   +1 more source

Calculation Method and Influencing Factors of the Maximum Breaking Current of SF₆ Circuit Breaker

IEEE Access
At present, there is a lack of research on the evaluation of the maximum breaking current of circuit breakers in arc simulation of SF6 circuit breakers.
Li Duanjiao, Wang Wei, Congwei Yao, Liu Miao, Peng Jiajun, Xiaofeng Pang, Wenxing Sun, Jianjun Li   +7 more
doaj   +1 more source

The Impact of Various Contact Structures on the Microscopic Surface Condition of Vacuum Interrupters During Capacitive Switching

High Voltage, EarlyView.
ABSTRACT The double‐break vacuum circuit breakers (VCBs) that utilize series break technology effectively increase the switching capability for capacitive currents, elevate the withstand voltage level, and reduce the likelihood of restrike, all without compromising the breaking capacity for short‐circuit currents.
Yun Geng, Xiaofei Yao, Pu Chen, Rong Jia, Hannan Shan, Yingsan Geng, Zhiyuan Liu   +6 more
wiley   +1 more source

Developing an evidence‐based model to implement co‐governance

Australian Journal of Public Administration, EarlyView.
Abstract Governments are seeking innovative ways to address complex policy issues in increasingly fragmented and fiscally constrained service contexts. Co‐governance is a relatively new mechanism for facilitating collective decision‐making between government and other stakeholders. Effective co‐governance can be difficult to establish and resource‐ and
Shona Marie Bates, Ciara Smyth, Ilan Katz, Bingqin Li, Fiona Haigh   +4 more
wiley   +1 more source

A Survey of Hybrid Circuit Breakers: Component-Level Insights to System-Wide Integration

IEEE Open Journal of Power Electronics
This survey provides a comprehensive review of hybrid circuit breakers and their applications in 1 kV to 800 kV, both alternating current and direct current systems.
Yuchen He, Chunmeng Xu, Yuan Li, Fang Z. Peng   +3 more
doaj   +1 more source