Megger IDAX 300, Руководство пользователя

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IDAX 300/322/350 ZP-AG03E AG033586EE
4 IDAX 5 SOFTWARE
Apparatus X parameter range Y parameter range
Core Form
Transformer 15-55 10-35
Shell Form
Transformer 55-90 10-35
Bushings
and CTs 20-100 0-5
Materials
“Material 1” is the solid insulation, “Cellulose”
or “Kraft paper”. “Cellulose” is the same default
database as in IDAX/MODS 2/3/4, “Kraft paper”
is a slightly different database tailored for CTs and
other objects containing mainly paper and little or no
pressboard. “Material 2” is the “liquid” insulation;
mineral oil, different types of ester oil, silicone oil or
air/vacuum.
Analyse
The analysis algorithm is based on complex
capacitance. Deviation is based on a summation
of deviation between the measured and modelled
response and indicates the “quality” of the match. If
the deviation is too large, no results will be displayed
as “Moisture”.
Temperature tab
In this view, the modelled insulation is presented
as dissipation factor at power frequency (50/60 Hz,
single frequency) versus temperature.
Save/Cancel
Changes made in this analyze window can either be
saved to the test, Moisture test or DFR test or not
saved to test (Cancel).
New File
Moisture
Moisture tab allows for performing measurement with
automatic estimation of moisture content. Besides
qualitative analysis of moisture content, parameters
such as capacitance, dissipation factor both measured
and calculated at 20°C according to individual
temperature correction (ITC) as well as oil conductivity
at reference temperature of 25°C are displayed.
DFR
The Dielectric Frequency Response (DFR) tab opens
for a general DFR measurement of capacitance and
dissipation factor over a frequency range. In this tab,
the user defines test object and setup, frequency
range, if and how the results should be analyzed etc.
ITC1
The ITC1 tab is used for condition assessment
of bushings and instrument transformers. Other
apparatus with homogenous insulation can be
assessed as well. The values of %DF/%PF at 50,
15 and 1 Hz are corrected to 20°C and evaluated
according to default or user set guidelines.
%DF/%PF
In this tab IDAX performs standard capacitance and
dissipation factor measurement as well as excitation
current measurements at a single frequency e.g. at
power frequency for the selected test object/test
mode.
DC
In the DC tab you can perform DC insulation
measurements. Results are presented as polarization
current versus time as well as Insulation Resistance (IR)
at 60 seconds, Dielectric Absorption Ratio (DAR) and
Polarization Index (PI).
Note The measurement time needs to be sufficient
(10 minutes) to display all values.