Results 191 to 200 of about 207,695 (262)

Discharge Ultraviolet Image Characteristics and Insulation State Evaluation of Polluted and Wet Suspension Porcelain Insulator Strings

IEEE Transactions on Instrumentation and Measurement
Discharge on the surface of the polluted suspension porcelain insulator will radiate ultraviolet (UV) light, which is an important symptom signal and can be used to evaluate the insulation state of insulator.
Shenghui Wang, Mingjun Zhou, Nan Li
semanticscholar   +1 more source

Temperature Researches of Porcelain Insulator

Advanced Materials Research, 2013
When porcelain insulator operates in a harsh environment for a long time, it will cause leakage current increase, and lead to heating phenomenon. As a result, the temperature of porcelain insulator can be changed, which probably due to crack, breakdown or other factors.
Cheng Jun Zhao, Chuan Li, Xu Zhang, Zhen Gang Zhao, Ying Na Li, Tao Xie   +5 more
openaire   +1 more source

An Efficient Method to Extract the Axial Temperature Curve From Infrared Image of Porcelain Insulator String

IEEE Transactions on Power Delivery
The axial temperature is often used to reflect the condition of insulators in research on the insulator state. Traditional manual extraction methods are cumbersome.
Shaotong Pei, Hangyuan Zhang, Yunpeng Liu, Rui Yang, Chenlong Hu, Wenjie Yang   +5 more
semanticscholar   +1 more source

An Impulse Voltage-Based Compact Device for Porcelain Insulator Defect Detection

IEEE transactions on dielectrics and electrical insulation
Porcelain insulators harboring internal defe- cts represent a significant risk to power system integrity. Prevailing methods for detecting internal defects in these insulators are susceptible to inaccuracies induced by environmental disturbances. In this
Lu Wen, Xinyu Huang, Bin Cao, Liming Wang   +3 more
semanticscholar   +1 more source

Switching-Surge Insulation Level of Porcelain Insulator Strings

IEEE Transactions on Power Apparatus and Systems, 1964
A quantitative research report is made here, based on tests of EHV (extra-high-voltage) insulator strings. Impulse, switching-surge, and a-c tests on vertical, horizontal, and 45-degree V-strings were carried out, using both positive and negative unidirectional impulses and 250- to 3,250-?sec (microsecond) switching surges.
D. E. Alexander, E. W. Boehne
openaire   +1 more source

Porcelain insulators in electrostatic precipitator

Journal of Electrostatics, 2015
Abstract Electrostatic precipitators (ESPs) are commonly the most used filtration technology at industrial environments considering that ESPs allow to have a high dedusting efficiency. ESP insulators are key components in a precipitator inasmuch as if they do not work properly, the efficiency decreases quickly, and even having an inadequate ...
Fernando Menéndez, Alberto Gómez, Francisco Voces, Virgilio García   +3 more
openaire   +1 more source

Porcelain Insulator Inspection Using Infrared Thermography

Sensor Letters, 2020
Inspection with thermography is a non-invasive, non-destructive process used in Power Systems facilities. Most temperature signatures that are not in the visible light range can be measured using thermal cameras, thus enabling the search of thermal behavior of porcelain insulators.
P. I. Lerantzis, P. T. Tsarabaris, N. J. Theodorou   +2 more
openaire   +1 more source

Porcelain for High Voltage Insulators

Transactions of the American Institute of Electrical Engineers, 1936
In this paper the mechanical failure of porcelain is discussed with special reference to 3 seldom recognized characteristics: the effect of the porcelain surface on the strength, the apparent anomalous distribution of individual mechanical test values, and the effect of time on mechanical strength.
openaire   +1 more source

Mathematical Morphology aided Random Forest Classifier based High Voltage Porcelain Insulator Contamination level Classification

2020 IEEE Region 10 Symposium (TENSYMP), 2020
In the present work, the influence of different surface contaminations on the performance of a porcelain insulator is investigated. The measurement of the Leakage current on different classes of the contaminated porcelain insulators is performed with the
Kaushik Sit, Abhinaba Chakraborty, S. Dalai, B. Chatterjee, A. Pradhan   +4 more
semanticscholar   +1 more source

A new porcelain post insulator

Electrical Engineering, 1934
A new porcelain post insulator for transmission lines, which is free from radio effect at its operating voltage, is described in this paper. Capacitance measurements are utilized to determine and rate the radio characteristics. Other points of design are described, such as improved leakage path to resist arcing in contaminated atmosphere, greater ...
openaire   +1 more source