Results 31 to 40 of about 1,832 (200)

Graphene-Enhanced CuW Composites for High-Voltage Circuit Breaker Electrical Contacts

Applied Sciences
To address the issue of over-standard short-circuit currents in a power system, it is imperative to enhance the comprehensive performance of the electrical contacts, which serve as the lynchpin of circuit breakers, so as to improve the breaking capacity ...
Tan Liu, Yu Han, Dongchen Jia, Zhen Pang, Yuwei Fu, Zhongxiao Song, Yi Ding   +6 more
doaj   +1 more source

Unidirectional Protection Strategy for Multi-terminal HVDC Grids

Transactions on Environment and Electrical Engineering, 2016
Protection issue is identified as the main drawback of emerging multi-terminal HVDC grids. Multi-terminal HVDC grid demands fast short circuit fault current interruption.
Ataollah Mokhberdoran, Nuno Silva, Helder Leite, Adriano Carvalho   +3 more
doaj   +1 more source

Contact arc time – important parameter of DC high-speed circuit-breakers [PDF]

MATEC Web of Conferences, 2019
The parameters of DC high-speed circuit-breakers (HSCB) and test methods are specified in the standards. These standards define requirements of the circuit breakers opening time and the total breaking time.
Rojek Artur, Skrzyniarz Marek
doaj   +1 more source

How to Navigate Disrupted Business Models in the 21st Century: At the Crossroads of the Circular Economy and the Industry 4.0 Transition

Business Strategy and the Environment, EarlyView.
ABSTRACT Our planet faces a critical crisis, with pollution, resource depletion and biodiversity loss surpassing sustainable limits. Businesses must address these challenges, with the circular economy and Industry 4.0 offering transformative potential through closed‐loop systems, regenerative solutions and advanced technologies.
Agnes Toth‐Peter, Rui Torres de Oliveira, Shane Mathews, Leonie Barner   +3 more
wiley   +1 more source

Circuit Level Model of Miniature Circuit Breakers [PDF]

IEEE Transactions on Power Delivery, 2018
We present a black-box model of miniature circuit breakers having a realistic physical background. In compliance with basic physics, engineering know-how and magneto-hydro-dynamics arc simulations, two sets of differential-algebraic equations are derived to model air plasma chemical dynamics and its interaction with breaker's physical environment ...
Federico Bizzarri, Angelo Maurizio Brambilla, Luca Ghezzi, Francesco Rigamonti   +3 more
openaire   +2 more sources

Locked in Transition: Examining the Role of Paradoxical Tensions in the Transition From Industrial Cluster to Eco‐Clusters

Business Strategy and the Environment, EarlyView.
ABSTRACT Industrial clusters are central to the circular economy transition, yet how they develop into eco‐clusters and the paradoxical tensions this transformation fuels remain underexplored. Drawing on 48 in‐depth interviews and secondary data from a Turkish textile‐recycling cluster, we develop an empirically grounded model of eco‐cluster transition
Tulin Dzhengiz, Leona A. Henry, Simon M. Smith   +2 more
wiley   +1 more source

Development and Application of PIKH-Type Current Sensors to Prevent Improper Opening of Parallelly Connected DC Vacuum Circuit Breakers

Energies
This article describes the development of current sensors used in DCU-type high-speed circuit breakers. DCU-type circuit breakers use the principle of turning off a constant short-circuit current by means of countercurrent.
Łukasz Nowak, Piotr Borkowski
doaj   +1 more source

Short-Circuit Protection Schemes for LVDC Microgrids Based on the Combination of Hybrid Circuit Breakers and Mechanical Breakers

International Transactions on Electrical Energy Systems, 2023
In recent years, low-voltage direct current (LVDC) microgrids are becoming more attractive because they represent a solution to integrate renewable sources, storage, and electronic loads bringing some advantages in comparison with traditional AC grids ...
Riccardo Lazzari, Luigi Piegari
doaj   +1 more source

A Review of Overcurrent Protection in Smart Grids Under Cyber‐Physical Threats With a Cyber‐Physical Evaluation Framework

Energy Science &Engineering, EarlyView.
By manipulating current and voltage measurements, an assailant can induce unwanted relay action while attempting to avoid detection. Detecting advanced cyber intrusions in power protection environments requires specialised data analysis and anomaly detection methods.
Feras Alasali, Anas AlMajali, Naser Naily, Hassen Loukil, Salah AbuGhalyon, William Holderbaum, Abdelaziz Salah Saidi   +6 more
wiley   +1 more source

Line Protection Operate Time: How Fast Shall It Be?

IEEE Access, 2021
An ultra-high-speed protective relay has been an important topic within the scientific community, and specifically within the power industry, for decades.
Sinisa Zubic, Zoran Gajic, Davor Kralj
doaj   +1 more source