Partial Discharge Cable Tester

1. Cable Testing Requirements and Preparations Before Testing

1）Prior to partial discharge testing, disconnect and ground the cable, leaving both ends suspended, and set up the safety perimeter.

2) Aim to minimize the cable joint areaPTRemoved surge protectors and other equipment.

3) Ensure cable heads are clean and maintain sufficient insulation distance from surrounding grounding parts.

4) Collect cable parameters such as length, model, type, and commissioning date.

5) Cable Length L: Measurement method for one side of the cable: 50m ≤ L ≤ 3km

Measurement method at both ends of the cable:L＞3km。

2. Insulation Resistance Testing

Main insulation resistance test for 10kV cables, utilizing a 2500V insulation megger for testing. The insulation resistance should remain unchanged before and after the test; the insulation resistance for the main insulation resistance test of 10kV cables must be greater than 50MΩ to proceed to the next stage of testing.

3. Test the intermediate joint position of the cable and the cable length

AdoptedSEBAKMT Easyflex ComMulti-functional Pulse Reflectometer (as shown in Figure)2) Test the full length of the cable and the positions of intermediate joints to measure cable length and joint locations, and to pre-locate faults such as short circuits and open circuits.

Testing Requirements:

The full length of the cable must be accurate for calibration purposes.

2) Ensure intermediate joint measurements are as accurate and detailed as possible, which is beneficial for determining the final position of partial discharge.

3) Measurement Range:50m～15000mThe measurement range must be adjusted according to the cable length.