Results 51 to 60 of about 57,453 (157)

Study on Raindrop Dynamic Behaviour and Its Impact on Insulator Flashover Characteristics Under Airflow Synergy

High Voltage, EarlyView.
ABSTRACT The synergistic effect of airflow on rainfall behaviour significantly impacts the flashover probability of insulators. This study combines experiments and simulations to investigate the influence of raindrop dynamic behaviour, shed structures and rainfall conditions on flashover characteristics under airflow conditions.
Keqi Huang, Xueqin Zhang, Song Xiao, Lirui Zhang, Yujun Guo, Guangning Wu   +5 more
wiley   +1 more source

The effect of kaolin and silica variation on the properties of porcelain insulators [PDF]

, 2019
Clay, Al2O3, feldspar and silica have been used to produce shackle-type porcelain insulators using slip casting method. The amounts of silica and kaolin were varied from 10 to 30 wt. % while keeping the amounts of other constituents constant. The samples
Onyeayana, I.P., Mgbemere, H.E., Okoubulu, A.B.   +2 more
core   +1 more source

The insulation problems on porcelain insulators

, 2005
Porcelain insulators used on electrical institutions are important materials to provide system reliability and material insulation. Specification of raw materials of insulators and environmental factors affect insulator strength and operation.
Özer, N. Lerzan, Çetin, Engin, Çetin, Meriç   +2 more
core   +1 more source

Research Progress on Electrical Insulation Under Superimposed Voltage With High‐Frequency Harmonics in New‐Type Power Systems

High Voltage, EarlyView.
ABSTRACT A new‐type power system serves as a critical technical support for the integration of new energy, and its secure and stable operation is of great importance. However, the extensive utilisation of power electronic devices leads to power equipment insulation being subjected to electrical stresses of high‐frequency harmonics, which can easily ...
Shengtao Li, Chuang Zhang, Weiwang Wang, Yuanwei Zhu, Liuqing Yang   +4 more
wiley   +1 more source

AC flashover performance of different shed configurations of composite insulators under fan-shaped non-uniform pollution

High Voltage, 2018
Currently, it is founded that under unidirectional wind and certain landform, composite insulators are always fan-shaped non-uniformly polluted. In this paper, artificial pollution tests on three types of composite insulators with different shed ...
Zhijin Zhang, Xinhan Qiao, Yi Zhang, Liang Tian, Dongdong Zhang, Xingliang Jiang   +5 more
doaj   +1 more source

Study of Thermal Behavior of Porcelain Insulators with the Finite Element Method

, 2011
In order to study the thermal behavior of the distribution line porcelain insulators when the line’s conductor current is high, a laboratory condition in a simulation program (ANSYS) was created considering the structure and geometry of porcelain ...
P.T. Tsarabaris, N. J. Theodorou, P. I. Lerantzis   +2 more
core   +2 more sources

A history of the porcelain industry in Jingdezhen [PDF]

, 1976
This study examines the history of the porcelain industry in Jingdezhen from the Ming dynasty to the present day, but with special emphasis on the Ming and Qing periods.
Dillon, Michael
core   +4 more sources

Diagnostics of porcelain insulators by partial discharges characteristics

Известия высших учебных заведений: Проблемы энергетики
RELEVANCE of the research is in the development of a non-destructive method for diagnosing porcelain insulators of high-voltage electrical equipment based on analysis of the characteristics of partial discharges (PDs).
A. M. Gataullin, A. N. Gavrilenko, Yu. V. Piskovatskiy, A. S. Minkin   +3 more
doaj   +1 more source

Microplastic Dynamics in Sediment Layers of Two Ramsar‐Designated Wetlands

Water and Environment Journal, EarlyView.
ABSTRACT Little is known about the vertical and spatial dynamics of microplastics in relation to hydrology and land use, particularly in African context. This study aimed to assess the abundance, type, colour and vertical distribution of microplastics in sediment from two Ramsar‐designated wetlands, the Makuleke and Nylsvley. Sediment core samples were
Nelisiwe Ngomane, Linton F. Munyai, Ross N. Cuthbert, Pule Mpopetsi, Farai Dondofema, Rabelani Mudzielwana, Philippa Huchzermeyer, Tatenda Dalu   +7 more
wiley   +1 more source

CHARACTERIZATION OF ELECTRICAL PORCELAIN INSULATORS FROM LOCAL CLAYS

, 2017
In this thesis, the characterization of electrical porcelain insulators based on local clays has been investigated. Test samples were made by varying the quantities of feldspar and silica required to form a mouldable plastic body with each clay sample ...
Okolo Chidiebere Cajetan, Olisakwe C.O., Ezendokwelu C.E., Umunna Chike, Ezechukwu O.A.   +4 more
core   +1 more source