FANOX SIL-D00, User Manual, Page: 30 / 226

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The actuation time starts when the following conditions are met simultaneously:
•
The phase shift of residual current and residual voltage is such that the residual current is
inside the intervention sector.
•
The residual voltage and current are inside the working area of the adjusted characteristic.
Group Description Minimum Maximum Step Unit Default
67NI_1
67NI_2
Directional neutral isolated overcurrent
Permission - - Yes/No - No
Directionality - - (1*) - No
Low Current 0.10 7.00 0.01 I
nominal
1
Low Voltage 2 65 0.1 V 30
High Current 0.10 7.00 0.01 I
nominal
2
High Voltage 2 65 0.1 V 60
Time delay 0.02 300.0 0.01 s 0.02
Operating angle 0 359 1 ° (deg) 90
Halfcone angle 1 170 1 ° (deg) 90
(1*) No, Forward, Reverse
The function starts up at 100% of the adjusted pickup and resets at 95%.
The actuation time is accurate to ±5%, o ±30ms, whichever is higher, of the theoretical actuation
time.
If function 67NI is configured with forward or reverse directionality, a directionality supervision
time of 20ms in the actuation will be introduced.
The relay provides an additional signal to the start and trip signals, the directionality, that
indicates if the residual current is inside the intervention sector.
If the Directionality parameter is adjusted to NO, neither the residual voltage and the direction of
the residual current won’t be evaluated, keeping these previous signals deactivated.
Besides the Directionality parameter, the ‘Reverse Directionality’ signal permits being configured
to a digital input to change the function to reverse directionality when the DI is active despite the
function was adjusted as direct directionality.