Measurement of Dissipation Factor of Inner Layers of Insulation in Three-Core Belted Cables

This paper presents a substantiation of an approach for direct measurements dielectric dissipation factor layers insulation between the conductors three-core power cables. Proposed is based on grounding inspecteddielectric layer through sufficiently low electrical resistance. The results carried out analysis, which was taking into consideration presence numerous parasitic parameters tested due to capacitive coupling electrically conductive elements cable, have shown that case value used resistor phase shift waveforms voltage drop inspected and resistor, this grounded, coincides with sine current parallel equivalent scheme losses. Because dependence loss angle curves voltage, presented measurement such coincidence values shift. Depending applied calculated basis measured either waveform dropon insulation, or voltage. Factors affect accuracy are discussed, schemes three core cable various ways applying testing theexample practical implementation also given. Further development supposed include comparative analysis its obtained by previously developed techniques aggregate measurements.