Surge tester ST 3820K

The combined surge and partial discharge tester ST 3820K was specially developed for integration into automatic test systems and for use in the laboratory. It is ideal for detecting interturn faults and insulation faults within a winding even before the fault affects the electrical specifications of the DUT. Thanks to the combination of surge generator and partial discharge measurement technology, the ST 3820K provides you with a compact complete solution for insulation testing of winding materials.

Thanks to the extremely steep voltage rise slope and the various surge capacities available as an option, the ST 3820K is ideally suited for both conventional winding goods (e.g. wound stators) and winding goods in the e-mobility sector (e.g. hairpin stators).

The partial discharges, excited by the surge tester, can be detected with active measurement technology both by radio and by wire. Radio measurement technology is the first choice for open test objects such as a stator. For closed or shielded DUTs, such as inverters or motors, partial discharges can be measured by inductive measurement via the connection cables of the DUT. The standardized IEC 61934 test method for determining the insulation parameters PDIV, RPDIV, RPDEV and PDEV can be carried out in a flash with the ST 3820K.

Note on Calibration for Surge Test and Partial Discharge Measurement
Factory calibrations can only be performed according to our specifications. For the Surge Test, this includes checking the generator voltage at three voltage levels, measuring (with oscilloscope ) the displayed surge voltage at three voltage levels, and checking the time scale with a test surge using the Dummy D4010. For the Partial Discharge Measurement, three level values are simulated and checked with our CR 4000 Simulator.