Results 81 to 90 of about 6,833,731 (285)

MODERN MICROPROCESSOR PROTECTION OF POWER TRANSFORMERS

Chronos, 2021
The purpose of the present study was to understand what advantages and disadvantages in the operation of microprocessor devices in the RZA, to analyze the main series of microprocessor protection, their advantages, disadvantages and features, to review microprocessor protection in the labor market.
openaire   +1 more source

Effects of Add‐On Icosapent Ethyl With Standard Treatment on Functional Outcomes and Inflammatory Biomarkers in Acute Ischemic Stroke: A Blinded Randomized Controlled Trial

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Ischemic stroke, a major cause of mortality and long‐term disability, results from the abrupt cessation of cerebral blood flow due to vascular occlusion or rupture. Icosapent Ethyl (EPA‐EE), approved for hypertriglyceridemia, has anti‐inflammatory and antithrombotic properties that may lessen ischemic damage.
Mitra Mahmoudi Meymand, Seyed Hossein Aghamiri, Saeed Mohmammad Soleymani, Shadiyeh Bararpoor Poshkohi, Samaneh Masoudi, Hadi Esmaily   +5 more
wiley   +1 more source

Research of lightning protection gap of 35 kV power line of coal mine

Gong-kuang zidonghua, 2013
In order to test lightning protection effect of protection gap for 35 kV power line, the paper simulated lightning invasion in 35 kV transformer taking 35 kV overhead line of a mine as model by use of ATP-EMPT electromagnetic transient analysis software,
DENG Jie-wen, REN Wen-bin, LIU Yuan, ZHANG Dong, YI Xiao-fei, LIAO Zhi-hua   +5 more
doaj  

Research on Differential Protection Strategy of Transformer Under Extreme Geomagnetically Induced Current

Energies
Geomagnetically induced current (GIC) flowing through power transformers causes core saturation, leading to local hot-spot overheating, abnormal vibration, increased noise, and even irreversible transformer damage and forced outage.
Pengjiang Xu, Yaoxuan Zhang, He Tang, Weiguo Zhen, Qiao Shi, Li Li, Yuan Wang, Zhiqin Ma   +7 more
doaj   +1 more source

Performance of current transformer operate under harmonic condition and their effects on transformer differential protection

MATEC Web of Conferences, 2018
This paper focused to determine the performance of Current Transformer (CT) operates under harmonics condition and their effects on transformer differential protection. A laboratory test has been implemented to determine the error produced by both CT and
Nisja Indra
doaj   +1 more source

Cerebrospinal Fluid Over Plasma Links Analytes to Cognitive Decline in Older Adults at Risk for Alzheimer's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To identify inflammatory analytes in cerebrospinal fluid (CSF) and plasma associated with cognitive decline in cognitively normal (CN) older adults at risk for Alzheimer's disease (AD). Methods In a longitudinal study of 118 CN older adults (65–80 years, 54% APOE ε4, 26% preclinical AD), 1331 CSF and 1501 plasma analytes were ...
Jagan A. Pillai, Audrey Zhu, Chunxuan Ma, Ming Wang, Yifan Yang, Lynn M. Bekris, Maria Khrestian, Frank P. DiFilippo, Mikhail Nasrallah, Aaron Burberry, James B. Leverenz, Yuan Hou, Feixiong Cheng, Stephen M. Rao   +13 more
wiley   +1 more source

Simulation study on transient operation and bypass protection of a single-phase conventional hybrid transformer

Journal of Engineering and Applied Science
To address the limited voltage regulation capability of conventional power-frequency transformers and the vulnerability of the power electronic branch in hybrid transformers to transient stresses, this paper studies a single-phase conventional hybrid ...
Wenming Liu, Xiao Tang, Pu Zhao, Xiao Liu, Peng Sun, Zhongjian Song, Bin Yang, Yechao Wang, Hao Zhou   +8 more
doaj   +1 more source

Voltage Distribution on Transformer Windings Subjected to Lightning Strike Using State-Space Method

Applied Sciences
Transient analysis in power systems is essential for identifying deficiencies in the system, as well as for the protection and design of equipment. Transients can arise from natural events or network operations; in either case, they have the potential to
İlker Arı, Mehmet Salih Mamiş
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Simulation of dielectric frequency response of transformer insulation system

, 2013
Frequency domain spectroscopy has been widely used to monitor the condition of insulation system in power transformers. For a core type of transformer, a simplified XY model of a duct has been developed which allows one to examine the contribution from ...
Yu, Guo, Chen, George
core   +1 more source