Cable Partial Discharge Testing

Haefely’s DDX 9160 and 9161 are state-of-the-art, modular digital partial discharge detectors that support up to four simultaneous PD/RIV and voltage inputs across AC, DC, and RIV applications in compliance with IEC, NEMA, and CISPR standards. While the battery-operated DDX 9160 offers a lightweight design ideal for portable on-site testing, the DDX 9161 features a low-noise AC supply optimized for high-sensitivity laboratory use. Both units utilize fiber optic isolation for safety, advanced digital noise filtering, and the customizable CaMS software platform, which enables multi-channel control, PRPD fingerprinting, live data logging, and automated PDF reporting.

Engineered to exceed standard partial discharge calibration requirements, the KAL 9520 is an advanced PD calibrator offering a broad measurement range (100 fC to 50 nC), a low-value injection capacitor, and versatile features such as double-pulse generation, polarity selection, and flexible synchronization modes. It fully complies with ANSI/ICEA T-24-380 standards for power cable testing, delivering precise double impulse (Two Pulse Response) calibration using a dedicated 400 mV voltage step and 100 pF injection capacitance.

Damped alternating current (DAC) test systems are lightweight, compact, and versatile systems for testing and diagnosis of medium voltage distribution and high voltage transmission class cables. DAC testing is used as an asset management tool to help assess the cable insulation condition of newly installed, repaired, or service-aged cables. The systems allow for voltage withstand tests, partial discharge (PD) measurement, with source localization along the length of cable, as well as the estimation of loss factor (or tan delta).