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Repetitive partial discharge inception voltage (RPDIV) measurement is indispensable for inverter-fed motor when testing according to IEC 60034-18-41 IS. Our previous study showed sensitivity comparison between kinds of electromagnetic (EM) sensors and a partial discharge (PD) measuring device in an actual motor core. This paper deals with an influence of the position and distance of EM sensor on the...
It is crucial to understand degradation factors under actual operation in the lifetime evaluation of the coil winding of transformer. Polyvinyl formal (PVF) wire is used in oil-immersed transformer. Main degradation factor is considered to be oxidation and damage of the insulation coating due to thermal stress and partial discharge (PD). This paper deals with electrical insulation performance evaluation...
This paper deals with partial discharge inception voltage (PDIV) of twist-pair sample with micro cellular coating wire used for inverter-fed motor winding is investigated under ac and repetitive impulse voltages. In addition, V-t characteristics of the twist-pair samples is also investigated under ac voltage application.
RPDIV (Repetitive Partial Discharge Inception Voltage) measurement becomes essential to fulfill a certificate test according to IEC60034-18-41IS for inverter-fed motor. In measurement of RPDIV, electromagnetic antenna is often used as a PD sensor. Thus, the detection sensitivity of the sensor is crucial to properly determine RPDIV. This paper deals with sensitivity comparison between kinds of electromagnetic...
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