Abstract
In this article, a new technique is presented for the remote online partial discharge (OLPD) monitoring of the stator insulation condition of in-service, high-voltage (HV) rotating machines with a focus on the Ex/ATEX HV motors used in the petrochemical industry. The technique applies wideband, ferrite-based high-frequency current transformer (HFCT) sensors and high-resolution measurement technology. This remote PD monitoring technique has significant advantages when monitoring motors located in Ex/ATEX hazardous gas zones in oil and gas and petrochemical facilities.
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