Section 7 Calibrating Injection Based 100% Stator Earth Fault Protection; Commissioning Process; Commissioning Tool Ict - ABB REG670 Commissioning Manual

1MRK 502 073-UEN A
Section 7
7.1
7.2
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Commissioning manual
Calibrating injection based 100% stator earth fault protection
Calibrating injection based 100% stator
earth fault protection

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.

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
During the installation, several checks are performed about both status of the
function and levels of the injected current and voltage. The check of signal levels
Section 7
GUID-F7897190-70E1-4421-984B-8E0F06BB93CD v1
GUID-06D3DD66-7D49-4D92-A175-AD1AE5ED19C3 v2
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