Szukana fraza: [Abstrakt = "Dielectric fluids based on synthetic esters are use in transformer insulating system. The article was presented selected physical and electrical properties of Midel 7131®. In this paper kinematic viscosity, density, dielectric dissipation factor tgδ, relative permittivity and conductivity in wide temperatures are shown. Kinematic viscosity measurements were performed using Ubbelohde viscometer with automatic time of outflow measuring iVisc Lauda. Density measurements were performed using set of areometers. To ensure constant temperature conditions of measurement water bath with thermostat Lauda were used. For the temperature lower than ambient temperature compressor cooler were used. Dielectric dissipation factor tg δ, relative permittivity and resistivity measurements were performed using measuring device BAUR DLT C with thermostatic test cell. The article is additionally included the results of streaming charging electrification current of Midel 7131®fluid, which were collected using flowing system with measuring pipe."]

Wyników: 0