Atec Hipotronics-DDX9121B - Manual (Page 4)

Haefely has a policy of continuous product improvement. Therefore we reserve the right to change design and specification without notice . LL_DDX9121b-1_1311_SG_1.doc – 4/6
DATA ACQUISITION & ANALYSIS
The advanced data acquisition and analysis software allows
a wide variety of possibilities such as recording PD pulses
of each and every test voltage cycle and analyzing them
both in the temporal and phase domain.
A chart recorder provides a hard copy of partial discharge
level versus voltage and testing time for each channel in
one customized graph. At any time during the test the
partial discharge levels can be monitored and after the
completion of the test, customized test reports for the
multiple channels can be generated which automatically
populate with snap-shots from notable events.
Chart Recorder with graphs PD vs. voltage and time
With the pattern acquisition and analysis module, several
two- and three-dimensional PD pulse patterns of all the
monitored channels (when equipped with a multiplexer)
can be displayed and recorded. Snaps shots of the 3D
patterns can be saved into a windows gallery for further
uses like customized test report generation or to export
them as image files.
Data filters and time-sliced views further permits a detailed
look at the PD pattern as deep as every cycle of the applied
test voltage and in certain cases, helps separate and
identify noise interferences.
INCEPTION AND EXTINTION PD TEST
IEC 60270, on paragraph 8.3.1 describes the
inception/extinction PD test. Generally the test is performed
by increasing the voltage until the PD level reaches a
trigger level, and then voltage is decreased until the PD
level goes below the trigger level. Voltage levels are
recorded at those two moments as Inception and extinction
voltages.
The DDX9121b can show graphically the results of this
particular test, and provide the inception and extinction
voltages.
V(kV)
PD(pC)
Inception
Voltage
PD trigger level
Extintion
Voltage
DATA EXPORT AND REPORTING
The reports are saved as HTML files containing graphs and
charts. In addition all data can be exported as comma
separated values(CSV) format for further analysis or highly
customized test reports in other programs like MS Excel
PD Pattern
Noise Pattern