AZT-9
ZPrAE Sp. z o.o.
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6.2. Graphic presentation and disturbance analysis module, iREC.
iREC software is a separate program installed with ZPrAE-EDIT package. It can be
used to visualise a given record file saved in COMTRADE format. It is launched from the
start menu by selecting the iREC shortcut or by selecting the file from record folder in
ZPrAE-EDIT software. When iREC is launched, open a selected record file. First, find a
folder with saved records (folder location will be saved) and then select the record, confirm
and go to the window shown in fig. 6.3.
A detailed instruction in electronic format is supplied with iREC software. In this instruction
only few options of the program, which are helpful when analysing disturbances recorded
by AZT-9 protection device, are presented.
Fig. 6.3. iREC main window.
Currents can be displayed in values of primary as well as secondary side of relays.
They can also be displayed in a standardised way. An option which is useful when
analysing disturbances is a possibility to create virtual channels i.e. sum of channels,
symmetrical components. After first readout of record file from the AZT-9, the bay’s
currents and binary signals i.e. logic, input and output, can be seen.
It is possible to filter only given curves, i.e. phase that was the cause of operation
can be left in the analogue channels. Active channels, i.e. those which changed their
status during recording can be left in digital channels. To do this, click the right mouse
button on binary channels and select Show only active option.
In addition, a given record can be printed out or exported as a picture to PNG
format.
Additional options include:
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creation of virtual channels e.g. calculation of symmetrical components,
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drawing 3-phase vector diagrams,
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determining harmonic components of curves,
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combining analogue channels, etc.
