ABB Relion 670 series, Руководство по установке и пусконаладке

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Section 11 Calibrating injection based 100% stator
earth fault protection
11.1 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.
11.2 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
1MRK 502 029-UEN A
Section 11
Calibrating injection based 100% stator earth fault protection
121
Installation and commissioning manual