Results 271 to 280 of about 15,793,057 (343)

Design and construction of a new insulator detection robot for application in 500 kV strings: Electric field analysis and field testing

Electric power systems research, 2019
Extra high voltage/ultra-high voltage (EHV/UHV) transmission lines have long insulator strings, and a number of porcelain insulators. Hence, it is convenient and efficient to use an insulator detection robot.
Ziheng Pu, Yuyao Xiong, Haitao Wang, Biwu Yan, Tian Wu, Lei Zheng, Pengxiang Yin   +6 more
semanticscholar   +1 more source

Programmable elastic valley Hall insulator with tunable interface propagation routes

Extreme Mechanics Letters, 2019
A challenge in the area of topologically protected edge waves in elastic media is how to tune the topological interface propagation route as needed. This paper proposes a tunable elastic valley Hall insulator, whose unit cell consists of two cavities and
Quan Zhang, Yi Chen, Kai Zhang, G. Hu
semanticscholar   +1 more source

Realistic Approach to Insulation Testing

IEEE Transactions on Aerospace, 1963
If one makes an attempt to discard from publications on electrical insulation subjects the various hypothetical and conditional expressions, as well as definitions of technical terms, chosen by individuals rather than taken from already existing standards, not much convincing evidence remains in support of definite insulating breakdown criteria and ...
N. Scott, R. Steiner
openaire   +1 more source

Insulation testing of electric windings

Electrical Engineering, 1943
THE paper describes a new method for the testing of insulation of windings, the advantages of which are adequate stressing of turn and conductor insulation and certain detection of defects. The new tester consists of a repeating-type surge generator, cathode-ray oscillograph, and synchronously driven switching equipment.
C. M. Foust, N. Rohats
openaire   +1 more source

Aging Mechanisms and Evaluation Methods of Silicone Rubber Insulator Sheds: A Review

IEEE transactions on dielectrics and electrical insulation
So far, silicone rubber (SiR) insulators are widely used in the power industry all over the world, due to their outstanding insulation properties and high reliability.
Guangning Wu, Yihan Fan, Yujun Guo, Song Xiao, Yang Liu, Guoqiang Gao, Xueqin Zhang   +6 more
semanticscholar   +1 more source

Insulator Detection in Aerial Images Based on Faster Regions with Convolutional Neural Network

2018 IEEE 14th International Conference on Control and Automation (ICCA), 2018
With the widely application of Unmanned Aerial Vehicle (UAV) in transmission lines inspection, the aerial images taken by UAVs can be utilized to detect insulator and its fault for further maintenance.
Xinyu Liu, Hao Jiang, Jing Chen, Junjie Chen, Shengbin Zhuang, Xiren Miao   +5 more
semanticscholar   +1 more source

An Overpotential Test for Insulators

Transactions of the American Institute of Electrical Engineers, 1922
Some of the factors met in the design of insulators and characteristics of routine electrical tests are discussed in this paper. A new overpotential test is described with its application and effects. Results of this test make possible a higher standard of practise in the manufacture and use of transmission line insulators.
openaire   +1 more source

The testing of insulating materials

Materials & Design, 1989
Abstract ERA Technology has devised a set of standardised tests which can be used to assess the performance of materials for different aspects of electrical low voltage switching applications. Different moulding materials were studied in conjunction with one contact materials, with the primary objective of investigating the effect of the moulding ...
D Charman, RA Simmonds
openaire   +1 more source

Insulator identification and self-shattering detection based on mask region with convolutional neural network

J. Electronic Imaging, 2019
. As a component of a power transmission line, the state of an insulator impacts the reliability and safety of the power grid. Self-shattering is an important factor that may cause insulator anomalies.
Yanli Yang, Ying Wang, Hongyang Jiao
semanticscholar   +1 more source

Evaluation Method for the UV Aging State of Composite Insulators Based on Hyperspectral Characteristic

IEEE Transactions on Instrumentation and Measurement, 2023
Strong ultraviolet (UV) radiation is one of the main factors that lead to the aging of composite insulators of transmission lines in high-altitude areas, which has brought security risks to the operation of power systems.
Han Ji, Xueqin Zhang, Yujun Guo, Song Xiao, Guangning Wu   +4 more
semanticscholar   +1 more source