©2023 - CIGRE CSE N°29 June 2023 1 Testing and Diagnosis of Power Cables using Damped AC Voltages AUTHORS E. GULSKI, G.J. ANDERS - Lodz University of Technology, Poland R. JONGEN - onsite hv solutions ag, Switzerland J. PARCIAK - onsite hv solutions Central Europe, Poland H. PUTTER, D. GÖTZ - Megger Germany GmbH, Germany Testing of the newly installed and service aged transmission power cables is becoming more and more important issue to ensure high quality of the cable circuits. During the past 20 years, in addition to the traditional continuous AC voltage testing using AC resonant systems, the damped AC method has become an alternative testing way accepted in many countries. PD monitored voltage withstand testing using damped AC voltages provides similar results for PD occurrence and the localization to the traditional resonant method. PD monitored damped AC voltage testing was successfully applied for quality control of newly installed on- and offshore long length HV cable connections up to 230 kV. Such tests form a sound basis for quality assurance and condition-based maintenance during the cable’s service life. Early cable failure occurrence can be prevented by high quality of the workmanship onsite [1,2]. In order to check the on-site installation, the acceptance voltage withstand testing is performed on the newly installed cable systems. During the on- site tests, both cable insulation and cable accessories are tested at an externally applied over-voltage condition just before putting them into operation [1,3]. The test intends to identify any weak spot in the power cable system e.g., introduced during CSE 029 Summary After-laying testing - Diagnostic testing - Damped AC Voltages - Dissipation Factor - Partial Discharges - Power Cables KEYWORDS 1. Introduction