Detailed simulations have indicated optimum insulation thicknesses of walls’ insulation for a variety of cases. Simplified analytical relations have also been proposed to the same aim, allowing the extraction of more general results, with limited accuracy however, as imposed by mathematical simplicity requirements. In this sense, a variety of important parameters are ignored, such as: the exist...

An interdigital capacitive sensor has been developed to characterize the permittivity of wire insulation. A theoretical model has been developed to calculate the capacitance of such a sensor that is in intimate contact with the surface of a double-layer cylindrical dielectric surrounding a conductive core. The cylindrical form of the electrostatic Green’s function due to an exterior point sourc...

The battery is the main component both as an energy provider and interface for several systems in electric vehicle. It has three important parameters: current, voltage, temperature that must be maintained can have a harmful reaction lead to overcurrent. also not overcharging or discharging too long because it cause damage affect its lifetime. Another error arise sensor failure due interference ...

Abstract In this paper, studies concerning the changes brought by gamma radiation on some PVC plates were made. The respective samples exposed to irradiation, at room temperature and different doses, such as (10, 20, 40, 80) kGy. in irradiated plates’ properties studied UV-Vis, electrical measurements, SEM analysis non-irradiated samples. results show that irradiation affects of plates. This de...

In gas insulation switch (GIS) substation, secondary devices such as line monitoring are placed in the switching field, and these electronic vulnerable to transient electromagnetic interference caused by operation. order facilitate measurement research of disturbance data under different working conditions, a simulation test device is developed this paper, which can be used simulate GIS substat...

Many thousands of tonnes of asbestos were used in buildings in the past, especially for thermal insulation of pipes and boilers in power plants. Occupational exposure to asbestos dust now mainly occurs during demolition, renovation and routine maintenance activities. The objective of this study was to evaluate occupational exposure to airborne asbestos during renovation of solid oil-shale fuell...

Asynchronous motors are used in many agricultural industries. Agricultural production is a with high humidity. As noted above, one of the main reasons for failure electric installations during prolonged downtime insulation breakdown due to its dampness. Moistening winding will degrade dielectric performance insulation. If motor often switched on and total operating time per day at least 4 - 6 h...

The present work deals with the study of electrical behavior cross-linked polyethylene (XLPE) used for HVDC cable insulation. aim is to better understand influences and thermal stresses on insulating material in order provide useful information designing cables. This was carried out Rogowski samples made XLPE insulation semiconductive electrodes, aged more than 3 years (1220 days) at three diff...