The precision test cell type RY1 measures the dielectric properties of liquid insulants such as insulating oil, i.e. it determines the dissipation factor tanδ and the dielectric constant εr as well as the specific resistivity.
The test cell has been designed as a cylindrical capacitor with a shielded measuring electrode (guard ring capacitor) thus avoiding partial capacitances, which might influence the test results.
The test cells design is in accordance with the specifications of VDE 0303, 0370 (Fed. Republic of Germany), SEV (Switzerland) and the recommendations of CIGRE.
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