QW-30 Cable Oscillatory Wave Partial Discharge Testing SystemIntroduction:
The QW-30 mainly detects 35KV cable systems.
The peak value of the oscillation wave voltage generated by QW-30 at the testing site can reach 60KV, with an effective value of up to 42.4KV.
The QW-30 is compact and lightweight, and can be transported to any testing location in a regular travel vehicle.
According to the differences in the tested cables, the QW-30 can detect cable lengths up to several kilometers long.

QW-30 Cable Oscillatory Wave Partial Discharge Testing SystemCan provide the following reliable detections
• Poor installation
Defects caused by improper laying of cable wiring
Defects in cable accessories
• Material changes in cables due to aging
Far beyond simple "pass" or "fail" tests, oscillation wave power testing is an advanced maintenance tool that not only provides asset management, but also makes the power grid operate better.

QW-30 System Configuration Checklist
10kV oscillation wave front-end detection unit
• Laptop computer
Emergency stop switch
Calibration instrument
High voltage connecting cable
• Data communication cable
• Power cord
• Discharge pole
• Grounding wire
• Software lock
• Testing software
• Analysis software

Merytronic diagnostic uses attenuated AC voltage as the voltage source, also known as OWTS. This detection technology consumes very low power during on-site measurement, and the measured cable length can be very long while maintaining high measurement accuracy. The frequency of the measurement circuit is generally between 20Hz and 800Hz, which meets the standard requirements.
The principle of detecting voltage comes from the fundamental LC oscillation principle in circuit theory: the tested cable will be continuously pressurized, and when it reaches the target voltage, the cable will be discharged through inductance through a high-voltage semiconductor switch. Therefore, when partial discharge occurs, a corresponding oscillating discharge voltage will be generated, and the loss factor of the cable can also be obtained. This alternating oscillation discharge (pulse) usually reaches about 50 times, during which defects that endanger the normal operation of the power grid can be converted into measurable partial discharge phenomena. The working principle diagram is as follows: