Advanced DAC technology utilizes voltage testing in combination with non-destructive diagnostic methods, such as partial discharge (PD) detection and dissipation factor (tan δ) measurement of the cable system and associated accessories.
On-site testing and diagnosis of Damped AC (DAC) of power cables is:
To obtain the overall technical condition of a newly installed on- and offshore power cable systems and/or to evaluate the electrical, thermal
and mechanical service aging the following diagnostic test will be performed and the results evaluated in relation to international guidelines:
Damped AC (DAC) technology (IEEE 400, IEEE 400.4) has the advantage of non-destructive testing and the method provides deterministic values of partial discharge (PD) activities in the cable system as well as the dissipation factor (tan Delta) of the overall cable system.
After-laying testing of a new installed HV power cable in a wind park using Dual-Side System
Master unit of a DAC 300 kV Dual-Side and Dual Power test system configuration
Slave unit of a 300 kV DAC Dual-Side test system
DAC testing of long lengths power cable circuits: