Cable Arcing Exposed by High Partial Discharge Activity in Motor Excerpt from paper “Review of Some Motor Field Problems and Recommendations” Company: Undisclosed Machine Description: Induction Motor, 12.5 kV, BUS EMCs (80 pF sensors) Cable Arcing Exposed by High PD Activity in Motor PD measurement is a good monitoring tool for looking into the health of stator winding. However, attention needs to be made that PD was not coming from sources other than stator insulation. This particular user uses PDTrac for their online PD monitoring purpose, but reported erratic & high PD readings over an extended period of time, as shown in Fig 1. Figure 1 – Erratic & High PDAn on-site inspection during their scheduled downtime did not find problem on the stator winding. Instead, we uncovered that those m

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