• Built-in AC hipot test and partial discharge (PD) detection functions
• Partial discharge test: 1 - 200 pC
• Programmable AC hipot voltage output 0.1 kVac ~ 10 kVac
• Up to 0.01 µA ~ 300 µA high accuracy and high-resolution current meter
• 1 pC ~ 2000 pC partial discharge detection range

Specifically designed for testing high voltage semiconductor components and high insulation materials.

The Chroma 19501-K Partial Discharge Tester is an instrument equipped with AC hipot test and partial discharge detection functions, providing 0.1kV~10kV of AC output, 0.01μA~ 300μA of leakage current, and 1pC~2000pC partial discharge detection range for measurement. Chroma 19501-K Partial Discharge Tester is compliant with the IEC60270-1 standard, in particular, the partial discharge testing requirements for high voltage.

1. Power button

2. Start testing button

3. Stop testing the button

4. Function key

5. Test page button

6. Home page button

7. System page button

8. Test Indicator

9. Arrow and input key

10. USB storage interface

11. Numerical editing key

12. High voltage module power connector

13. Signal control connector

14. Option

15. HANDLER interface: Connect to the PLC controller

16. RS-232 interface: Connect to PC for control

17. LAN interface: Connect to PC for control

18. USB interface: Connect to PC for control

19. Host power connector

20. Grounding terminal

1. High voltage module power indicator

2. Safety switch INTER LOCK

3. High voltage module power connector

4. Signal control connector

5. Grounding terminal

Partial Discharge is the local dielectric breakdown of a small portion of insulation systems where the electric field strength exceeds the breakdown point of the insulation material; this does not bridge the space between two conductors.

The partial discharge tester applies voltage to the DUT under a certain condition to measure the apparent partial discharge (PD). Besides verifying its ability to withstand a transient high voltage (hipot test), it also verifies the insulation integrity at rated operating voltage. The partial discharge test can detect whether there are abnormal air gaps on the electrical components by applying a charge slightly above the maximum rated voltage. This also tests its long-term reliability under normal voltage conditions. Although it is impossible to be 100% free of air gaps inside the insulation material during actual production, the IEC60747-5-5 optocoupler standard still defines that for partial discharge testing, the discharge capacity cannot exceed 5pC (qpd=5pC).

When using a partial discharger to calibrate the partial discharge tester for measuring micro discharge, the signal is very small and fast. Thus, the partial discharge tester has to be accurately calibrated before shipment to ensure the high-frequency signal can be measured during discharge. The IEC60270-1 high voltage test standard, which explicitly states the calibration standards and methods for partial discharge, is conformed to developing the Chroma 19501-K partial discharge tester.

The Chroma 19501-K is a high-precision partial discharge tester equipped with 200pC and 2000pC, two ranges to measure from 1pC to 2000pC, and the best resolution in the range 200pC is 0.1pC. Its high accuracy measurement and intuitive display of measured results on the screen facilitate the assessment and analysis of small discharges for highly insulated objects.