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Introduction
1–20
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Oscillography
The GT100 includes a graphic data analysis tool known as Oscillography. The
inverter firmware continuously records, in the CCU2 non-volatile memory, 500
samples of data at 1 millisecond intervals. Of these, 250 samples are taken right
before a fault occurs and 250 samples are taken after the fault. Once a fault occurs
and the 250 samples are logged, the log stops and goes into DONE status. The log
will start recording again as soon as the fault is cleared. Oscillography requires the
use of a PC connection using the GT View Graphic User Interface (GUI) software
or via the RS485/Modbus connection.
The following is the list of parameters which instant values shall be stored in the
oscillography records:
•
Vab - Grid voltage phase A to phase B
•
Vbc - Grid voltage phase B to phase C
•
Vca - Grid voltage phase C to phase A
•
Ia - Grid current phase A
•
Ib - Grid current phase B
•
Ic - Grid current phase C
•
Grid Hz - Grid frequency
•
DC_V - PV array voltage
•
DC_I - PV array current
•
Fault - hexadecimal code of the fault
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