Atec Hipotronics-DDX9121B - Manual (Page 2)

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 – 2/6
USER ORIENTATED INTERFACE
The user interface has been designed to make PD readings
easy. All options are grouped by categories, and the scope
window shows all test related information. Even specific
colours have been selected to reduce the strain on the
user’s eyes during long term testing.
Indications about the detector status, selected frequency
band, input channel, PD level, Test voltage, and frequency
are grouped in the scope window and can be displayed at
any time.
Detector settings are displayed next to the scope window
by clicking the settings button, all options are grouped by
category to make the configuration of the device easier
than ever.
MODULAR DESIGN
for normal partial discharge test on one phase test objects
the DDX9121-1 is equipped with one measuring input
(DDX9121b-1).
For distribution transformers, the DDX9121b-MUX option
(released by software code) add an embedded manual
switch with “ALL” option. With this new feature the
transformer is tested as a single phase test object, and
switch is only used to locate the phase if PD level is above
the limit.
For power transformers, several detectors (up to 9) can be
combined and connected to a single computer providing
simultaneous PD readings. Complete measuring system
can be controlled from a laptop or built into a measuring
desk.
REAL TIME SIMULTANEOUS MEASUREMENTS
The DDX®9121b multi-detector PD system provides
simultaneous PD level and phase resolved displays of the
PD activity at any given moment during the test. A user can
use this information to characterize and possibly locate the
origin of discharge sources.
A chart recorder provides a hard copy of partial discharge
level versus voltage and testing time for each channel in
one customized graph. 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.