Section 7
Calibrating injection based 100% stator
earth fault protection
7.1
Commissioning process
The commissioning process utilizes the commissioning tool ICT. The instructions for
the process cover installation, calibration, commissioning, monitoring and auditing
for the 100% stator earth fault STTIPHIZ function.
7.2
Commissioning tool ICT
The 100% stator earth fault protection STTIPHIZ functions in IED require a number
of settings. The settings
k1, k2
and the reference impedance require measurements on
the generator performed by the ICT (injection commissioning tool). The factors are
derived in connection to the calibration measurements during commissioning. The
ICT tool is an integrated part of the PCM600 tool.
Furthermore, ICT also assists the commissioning engineer to perform a successful
installation because of its structure and validating capabilities. During installation,
commissioning and calibration, ICT performs various tests to verify that the
installation is acceptable and the calibration successful. Besides carrying out the
actual tests, ICT also provides the commissioning engineer with tips if such are
needed during the commissioning.
When ICT is started, 100% stator earth fault protection is chosen.
There are five different parts of the ICT tool to be performed during commissioning
and operation:
1. Installing
2. Calibrating
3. Commissioning
4. Monitoring
5. Auditing
Before proceeding make sure that all necessary connections are in place.
Installing
When the injection is started, check that the injected voltage and current are within the
permissible limits. If not, adjust the settings of the injection unit REX060. The ICT
tool will check automatically for slight differences between actual injected and set
1MRK502053-UEN B
Section 7
Calibrating injection based 100% stator earth fault protection
Generator protection REG670 2.0 IEC
71
Commissioning manual
Содержание REG670 2.0 IEC
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