The Computing of the Influence of a Steady Element on the Polarization Spectrum

This paper describes computation of the influence of a steady current element on the current response of insulation material. The steady element is always present. When the insulation is dry, it can be neglected. When moisture is present, the steady element has to be calculated. A decision can be made after examining the spectrum

Thermal – Oxidation Stability of Insulating Fluids

This paper deals with the thermal – oxidation stability of insulating fluids by the EEZ– ORGREZ test method [1]. It describes the principle test method as a preparation of experiment and the thermal – oxidation stability measuring of insulating oil.

Energy technological complex based on the use of coal

The paper proposes a flow chart of an energy technology complex based on thermochemical processing of solid fuels with a consistent removal of separation products. The scheme is designed for the use of coal and other solid fuels, as a result of the developed methodology for modeling the processes occurring during the thermal decomposition of the organic mass. Calculations of the circuit elements show that the thermal efficiency is increased when implementing successive separation of exhaust coal products

The Computing of the Influence of a Steady Element on the Polarization Spectrum

This paper describes computation of the influence of a steady current element on the current response of insulation material. The steady element is always present. When the insulation is dry, it can be neglected. When moisture is present, the steady element has to be calculated. A decision can be made after examining the spectrum

Thermal – Oxidation Stability of Insulating Fluids

This paper deals with the thermal – oxidation stability of insulating fluids by the EEZ– ORGREZ test method [1]. It describes the principle test method as a preparation of experiment and the thermal – oxidation stability measuring of insulating oil.

Temperature Dependence of a Dielectric Relaxation in Weakly Polar Ferrofluids

In this paper, we report on the temperature dependent broadband dielectric response of a ferrofluid based on transformer oil and magnetite nanoparticles covered with oleic acid molecules. For that purpose the method of dielectric spectroscopy has been chosen in the frequency range from 20 Hz up to 100 kHz. The experiments were carried out on thin film ferrofluid samples confined in a glass plate capacitor containing indium tin oxide (ITO) plate electrodes. The obtained complex permittivity spectrum shows a pronounced dielectric dispersion in the low frequency range. Taking into account the ferrofluid composition we associate this relaxation with ion impurity polarization at the nanoparticle-oil interface. The strong temperature dependence of the relaxation process has been found when conducting the experiments in the temperature range from 298 K to 358 K. The relaxation time of the revealed process exhibits a typical Arrhenius behavior. Based on the conducted experiments and analysis, we propose some reasonable practical applications of the studied ferrofluid in the field of electrical engineering

Monitorowanie zanieczyszczenia środowiska na izolatorach wysokiego napięcia

This work is focused on environmental pollution monitoring on selected high-voltage insulators. It is well known that environmental pollution on electrical insulation is one of the problems faced by distribution utilities and electricity transmission system. Due to this reason there is a need to deal with monitoring of environmental pollution as it strongly influences their capability to withstand the high-voltage stress without the breakdown. It is the aim of present work to explain influence of morphology and chemical composition of pollutants on the surface resistance and conductivity of selected insulators.W artykule przedstawiono wyniki prac dotyczących monitorowania zanieczyszczenia środowiska na wybranych izolatorach wysokonapięciowych. Powszechnie wiadomo, że zanieczyszczenie środowiska oddziałujące na izolację elektryczną jest jednym z problemów, z którymi borykają się przedsiębiorstwa dystrybucyjne i system przesyłu energii elektrycznej. Z tego powodu istnieje potrzeba monitorowania zanieczyszczenia środowiska które silnie wpływa na ich zdolność instalacji do pracy bez awarii. Celem niniejszego artykułu jest wyjaśnienie wpływu morfologii i składu chemicznego zanieczyszczeń na oporność powierzchni i przewodnictwo wybranych izolatorów