ABB Relion 670 Series Installation And Commissioning Manual page 184

Section 15
Verifying settings by secondary injection
178
IEC06000652 V2 EN
Figure 96: Example characteristic
Non-directional earth fault current protection
Procedure
1. Measure that the operate current is equal to the INNonDir> setting.
The function activates the START and STDIRIN output.
2. Measure the operate time of the timer by injecting a current to get two times
the set INNonDir> operate value.
3. Compare the result with the expected value.
The expected value depends on whether definite time tINNonDir or inverse
time was selected.
4. Continue to test another function or complete the test by setting the test mode
to Off.
Residual overvoltage release and protection
Procedure
1. Measure that the operate voltage is equal to the UN> setting.
The function activates the START and STUN signals.
2. Measure the operate time by injecting a voltage 1.2 timers set UN> operate
value.
3. Compare the result with the set tUN operate value.
4. Inject a voltage 0.8 · UNRel> and a current high enough to operate the
directional function at the chosen angle.
5. Increase the voltage until the directional function is released.
6. Compare the measured value with the set UNRel> operate value.
RCADir = 0º
ROADir = 80º
Operate area
3I
0
80 80
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