Suggested Methods for Determining the Permeability and Dielectric Dissipation Factor of Electrical Insulation Materials at Power, Sound and Radio Frequencies Including IEC 60250 Meter Wavelengths

The IEC 60250 standard, published by the International Electrotechnical Commission (IEC), describes procedures for determining transmittance and emission factors, and quantities calculated from them, such as the loss index, in a frequency range of approximately 15 Hz to 300 MHz. Some of the methods described in this standard are used, with special precautions, for measurements at frequencies significantly lower than the given limits. Liquids and fusible materials, as well as solid materials, are measured using the described methods. The measured values ​​depend on physical conditions such as frequency, temperature, and moisture content, and in special cases, on the field strength.

In some cases, tests at voltages exceeding 1000 Volts may reveal effects unrelated to permittivity and dielectric dissipation factor, but are not described in this standard.

Within the scope of this standard, the relative permittivity (dielectric constant) is the ratio of the capacitance of a capacitor with the test material as the dielectric to the capacitance of a vacuum capacitor as the dielectric. For materials to be used to insulate electrical components, the dielectric constant should be low. For materials to be used as a dielectric in a capacitor, the dielectric constant must be high so that capacitor sizes can be minimized.

Again, within the scope of this standard, the dispersion factor is the ratio of the power consumed in the test material to the applied power.

Two standards that are equivalent to this standard and developed by the American Testing and Materials Organization (ASTM) are:

• ASTM D150-18 Standard test methods for ac loss characteristics and permittivity (dielectric constant) of solid electrical insulation. These test methods cover the determination of the relative permittivity, dissipation factor, loss index, power factor, phase angle, and loss angle of samples of solid electrical insulating materials when the standards used are bulk impedances.
• ASTM D2520-21 of solid electrical insulating materials at microwave frequencies and 1650 degreeStandard test methods for complex permittivity (dielectric constant) at temperatures up to These test methods cover the determination of the relative complex permittivity (dielectric constant and diffusion factor) of solid non-magnetic dielectric materials.

Our organization, among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, with its trained and expert staff and advanced technological equipment, within the scope of the IEC 60250 standard, the permeability of electrical insulation materials and dielectric strength at power, sound and radio frequencies, including meter wavelengths. It also provides testing services to determine the diffusion factor.