V
ref
=-3V
0
Operate area
3I
0
RCA = 0º
ROA = 80º
ANSI06000652-2-en.vsd
ANSI06000652 V2 EN
Figure 12: Example characteristic
Non-directional ground fault current protection
Procedure
1. Measure that the operate current is equal to the INNonDirPU setting.
The function activates the BFI_3P and STDIRIN output.
2. Measure the operate time of the timer by injecting a current of 200% of the 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
Disabled.
Residual overvoltage release and protection
Procedure
1. Measure that the operate voltage is equal to the VN_PU setting.
The function activates the BFI_3P and STUN signals.
2. Measure the operate time by injecting a voltage 1.2 timers set VN_PU operate value.
3. Compare the result with the set tVN operate value.
1MRK 505 293-UUS A Section 6
Testing functionality
57
Commissioning manual
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