The precision test cell type RY1 measures the dielectric properties of liquid insulants such as insulating oil, i. e. It determines the dissipation factor tan-delta and the dielectric constant ε r 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 cell' s design is in accordance with the specifications of VDE 0303, 0370 (Fed. Republic of Germany), SEV (Switzerland) and the recommendations of CIGRE. IEC and ISO, as well as with ASTM standards (USA).

 

The temperature controller type SG121 with digital temperature adjustment is used to heat up the test cell.