PD Diagnosis (XDP, NDB Technology, Canada)
Necessity of Diagnosis
- Electric utilities such as underground cable, splices, termination is where deterioration fault occur easily. Water-tree inside the insulator of the cable causes PD which eventually lead deterioration of the cable. In order to prevent such fault, it is necessary to manage and maintenance those utilities.
- Attach sensor of the XDP to the utilities that need to be tested. For S/S splices, it is recommended to test single phase of the cable with single point from the Cable Head and also the cable where it has the curve point with lots of pressure put in. For M/H cable it is recommended to test single phase with more than 3 point of the pressured point of the cable.
- XDP detect the PD signal and classify them into DP unit to help users to understand. Auditory signals are hard to distinguish from the other noise interference but XDP minimize the noise from the signals. XDP is portable equipment with flexible sensors that can be useful on harsh environment such as narrow space.