Faculté du Génie Electrique et d'Informatique

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Communications scientifiques internationales

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Browsing Faculté du Génie Electrique et d'Informatique by Author "Hedir, Abdallah"

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    Behavior of Low Density polyethylene Aged Under UV Radiation.
    (26/08/2019) Slimani, Ferhat; Hedir, Abdallah; Moudoud, Mustapha; Loucif, Amina
    Low density polyethylene (LDPE) is a usual material used within high voltage insulation systems. Like all polymers, this material may be aged after working under high voltage for a long time. The ageing process of this ma-terial is essentially caused by external factors. The exhibition to ultraviolet (UV) radiation is one of these factors. This work investigates the effect of this constraint on the electrical and mechanical properties of LDPE after UV-ageing. This paper includes the sample preparation process, the ageing of sam-ples under identical conditions for up 380 h and finally the analysis of electrical and mechanical properties after the ageing process. The obtained results show that these properties are considerably affected by the ultraviolet radiation
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    Impact of Thermal Constraint on The Low Density Polyethylene (LDPE) Properties
    (26/08/2019) Hedir, Abdallah; Slimani, Ferhat; Moudoud, Mustapha; Bellabas, Ferhat; Loucif, Amina
    Nowadays, Low density polyethylene (LDPE) is increasingly used as voltage cable insulating material. Owing to its excellent mechanical and electri-cal properties, LDPE may undergo degradation under service conditions. The focus of this work is to investigate the eventual impact of temperature on the LDPE characteristics. For this purpose, dielectric properties (Breakdown strength, Dielectric loss factor and dielectric constant); and mechanical charac-teristics (tensile strength and elongation at break) were studied. Aim of this work is the investigation of possible changes in some Low density polyethylene (LDPE) properties subjected to thermal constraint. The obtained results show that all the properties are widely affected by thermal constraint.
Communications scientifiques internationales