Performing Calibration - ABB REG670 Commissioning Manual

1MRK 502 073-UEN A
6.4
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Commissioning manual
Calibrating injection based sensitive rotor earth fault protection
The accurate setting of this frequency is essential for proper operation of the
protection under different operating conditions.

Performing calibration

1. From the Calibrating tab, select the first sub tab, i.e. Step1: Measurement
1.
2. Make sure you have not attached any additional impedance in parallel with
the rotor.
3. From the ICT toolbar, select the Start reading from IED button.
The generator shall be in a condition that is as close as possible to the normal
operating condition as during the Installation.
4. When the statistical error of the performed continuous measurements reaches
an acceptable value, the indicator bar reaches the stability region (turned
green), and it is allowed to select the Submit button.
Clicking the Submit button the result is stored for later calculations. ICT
automatically shifts to the second calibration sub tab, Step 2: Measurement
2.
It is very important that calibration steps 1 to 3 is performed
in the proper order. If not, the calibration might fail. If
readings are not stable during the step, a warning to repeat the
step may be suggested; the step shall be repeated in order to
avoid that the calibration fails.
Section 6
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