ABB Relion 670 series, Руководство по установке и пусконаладке

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user stops the sequence by acceptance of the measurement. The result is stored
for later calculations.
After the three measurements ICT calculates the complex factors k1 and k2. The
reference impedance RefR1 + j RefX1 is also calculated. After this the values are
downloaded to the parameter setting in PCM600. From PCM600 the settings are
downloaded to IED.
During the three measurements described above a check is made that there are
sufficient changes in the measured impedance in order to guarantee that there is no
primary fault from the beginning or other problems due to the installation or
calibration procedure.
Now the reference impedance is derived for one operational state. It might be
necessary to make measurements to derive reference impedance for other
operational cases. For information on this, see Commissioning below.
Commissioning
There is a possibility to have two different reference impedances. The need to
change the reference impedance is due to different operating conditions of the
machine.
In the commissioning part of ICT this can be done. For each operation state of
interest a measurement is performed. If the reference impedance differs from the
first one, calculated under the calibration session, the new reference impedance is
stored by the command;
Submit toParameter Setting .
If more than one reference impedance are to be used, there must be a logic
configured to detect such changes in the operation states that requires a change of
reference impedance.
Monitoring
In the monitoring part the calibration can be checked by applying the known fault
resistance and compare it with the actual function measurement. It is also possible
to identify operational states where change of reference impedance is required.
Auditing
In the auditing part calibration and commissioning reports are made.
10.3 Launching injection commissioning tool (ICT)
1. To launch the Injection commissioning tool (ICT), right-click REG670 in the
PCM plant structure and select the Injection commissioning .
2. In the ICT toolbar, select the Rotor Earth Fault function.
1MRK 502 029-UEN A
Section 10
Calibrating injection based sensitive rotor earth fault protection
109
Installation and commissioning manual