Results 111 to 120 of about 2,763 (226)

Kesan penggunaan peta konsep ke atas pencapaian mata pelajaran rekabentuk sistem dalam kalangan pelajar program ijazah sarjana muda teknologi maklumat dan multimedia [PDF]

, 2008
Peta konsep adalah satu kaedah persembahan yang menerangkan sesuatu konsep dalam bentuk grafik. Penggunaannya dalam proses pengajaran dan pembelajaran mampu untuk meningkatkan pencapaian pelajar dan mengurangkan pemasalahan di dalam pembelajaran.
Zainal Abidin, Norazlin
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The Influence of Material Modification and Residues on Space Charge Accumulation in XLPE for DC Power Cable Application

, 2007
The effects of material modification and cross-linking by-products (residues) quantity on space charge accumulation and decay in XLPE have been investigated using the pulsed electro-acoustic technique.
Chen, G, Disaado, L A, Fothergill, J C, Fu, M   +3 more
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Space charge accumulation under the effects of temperature gradient on solid dielectric DC cable

, 2009
It is well known that existence and accumulation of space charge within the insulating material poses threat to the reliability in the operation of dc power cables. When the cables are loaded under high voltage direct current (HVDC), temperature gradient
Chen, George, Choo, Wilson, Swingler, Steve   +2 more
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Laboratory and field partial discharge measurement in HVDC power cables [PDF]

, 2015
A range of experimental and field measurements of partial discharge (PD) activity under high voltage direct current (HVDC) conditions have been conducted with the goal of developing effective monitoring techniques for PD in HVDC cables and ancillary ...
Awodola, Joseph, Corr, Edward, Giussani, Riccardo, Hu, Xiao, Judd, Martin, Neumann, Alex, Reid, Alistair, Seltzer-Grant, Malcolm, Siew, W H, Zhu, Minan   +9 more
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Improved direct current electrical properties of XLPE modified by graftable antioxidant and crosslinking coagent at a wide temperature range

High Voltage
To enhance the DC electrical performance of cross‐linked polyethylene (XLPE), the graftable antioxidant methacrylic acid 2‐hydroxy‐3‐(4‐anilinoanilino) propyl ester (GA), which contains carbonyl and amino groups, and the crosslinking coagent ...
Xu Yang, Hong Zhao, Chengcheng Zhang, Chunyang Li, Xindong Zhao, Jiaming Yang, Xuan Wang   +6 more
doaj   +1 more source

“Mirror Image Effect” Space Charge Distribution in XLPE Power Cable under Opposite Stressing Voltage Polarity

, 2005
The paper presents space charge distributions under opposite voltage polarities in full size cross-linked polyethylene power cables using the pulsed electro-acoustic technique.
Chen, G, Fothergill, J C, Fu, M
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Space charge measurement as a diagnostic tool to monitor electrical ageing in polymeric materials

, 2006
Space charge is a term used to describe the excessive charges in volume. Such excessive charges can be electrons, ions or mixture of both. In solid dielectrics space charge tends to build up at discontinuities, such as at the dielectric-electrode ...
Chen, G.
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Calibration of the Pulsed Electroacoustic Technique in the Presence of Trapped Charge

, 2006
The influence of pulse voltage on the accuracy of charge density distribution in the pulsed electroacoustic technique (PEA) is discussed. It is shown that significant error can be introduced if a low dc voltage and high pulse voltage are used to ...
Chen, G, Chong, Y L, Fu, M
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Time domain analysis of partial discharges envelope in medium voltage XLPE cables [PDF]

, 2015
Partial discharge (PD) analysis has been widely used to detect premature degradation of power cables. Although there are recognized techniques for PD analysis, there is still lack of knowledge about measuring and modeling this phenomenon.
Burgos Payán, Manuel, Chávez Orzaez, Jorge Jesús, Granado Romero, Joaquín, Rosendo Macías, José Antonio, Torralba Silgado, Antonio Jesús, Álvarez-Arroyo, César   +5 more
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Electrical Treeing in Silicone Rubber

, 2011
Electrical treeing has been widely studied in a range of polymeric materials. In these investigations, the morphology and PD patterns associated with the growth of electrical trees in a model transparent silicone rubber were investigated using a new ...
Freebody, N A, Hosier, I L, Moss, G, Swingler, S G, Vaughan, A S   +4 more
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