Dynamic Ratings Inc. N53 W24794 S. Corporate Circle, Suite A Sussex, WI 53089 Tel: +1 (262) 746-1230 Fax: +1 (262) 746-1232 www.dynamicratings.com Monitoring, Control and Communications for Electrical Power Apparatus Subject to change without notice. Partial Discharge Monitoring Saves, 13.8 kV Motor ? CASE STUDY Challenge A large machines motor had been periodically measured to be showing significant partial discharge (PD) activity. The data shown below, documented a steady increase in PD activity over a multi-year period. The highest levels of PD activity were reported on RTD’s numbered (3, 4 and 6.) Dynamic Ratings felt that due to the balanced polarities and correlation with the operati

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