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If the unit operates as defined time, the accuracy of the Time Delay is equal to the set time delay ±35ms
or ±0.5% (whichever is greater).
If a curve is selected for the curve setting, the accuracy of the time delay is equal to the theoretical time
±30ms or ±5% (whichever is greater).
The curves used are IEC 60255-151 and IEEE, which are described in the corresponding section.
4.4 Function 50G. Instantaneous measured neutral overcurrent
This protection function can be set by using the following parameters:
Function
Description
Minimum
Maximum
Step
Unit
Default
50G_1
50G_2 (*)
Instantaneous measured neutral overcurrent
Function Enable
-
-
No/Alarm/Trip/SHB Trip
-
No
Current Tap
0.010
30.000
0.001
xIn
5.000
Time Delay
0.000
300.000
0.001
s
0.200
(*) Optional depending on model
The time delay is independent from the operating current flowing through the relay, so if the phase
current exceeds its predetermined value for an equal or greater amount of time than this preset value,
the protection function activates (trips) and does not reset itself until the average value of the phase
drops below the point of current pick-up.
The function activates at 100% of the preset input and deactivates at 95%. The reset is instantaneous.
The accuracy of the Time Delay is equal to the set time delay ±35ms or ±0.5% (whichever is greater).
4.5 Function 50N. Instantaneous calculated neutral overcurrent
This protection function can be set by using the following parameters:
Function
Description
Minimum
Maximum
Step
Unit
Default
50N_1 (*)
50N_2 (*)
Instantaneous calculated neutral overcurrent
Function Enable
-
-
No/Alarm/Trip/SHB Trip
-
No
Current Tap
0.050
30.000
0.001
xIn
5.000
Time Delay
0.000
300.000
0.001
s
0.200
(*) Optional depending on model
The time delay is independent from the operating current flowing through the relay, so if the phase
current exceeds its predetermined value for an equal or greater amount of time than this preset value,
the protection function activates (trips) and does not reset itself until the average value of the phase
drops below the point of current pick-up.
The function activates at 100% of the preset input and deactivates at 95%. The reset is instantaneous.
The accuracy of the Time Delay is equal to the set time delay ±35ms or ±0.5% (whichever is greater).
Summary of Contents for SIL-A A Series
Page 8: ...www fanox com Rev 04 8 112 2 1 2 Case dimensions The dimensions are in mm...
Page 9: ...www fanox com Rev 04 9 112 2 1 3 Connection diagrams 2 1 3 1 Analog connections...
Page 12: ...www fanox com Rev 04 12 112 2 2 SILA with short circuitable current terminals 2 2 1 Front view...
Page 13: ...www fanox com Rev 04 13 112 2 2 2 Case dimensions The dimensions are in mm...
Page 14: ...www fanox com Rev 04 14 112 2 2 3 Connection diagrams 2 2 3 1 Analogic connections...
Page 22: ...www fanox com Rev 04 22 112 3 3 Functional diagram...
Page 61: ...www fanox com Rev 04 61 112...
Page 63: ...www fanox com Rev 04 63 112...
Page 64: ...www fanox com Rev 04 64 112...
Page 65: ...www fanox com Rev 04 65 112...
Page 111: ...www fanox com Rev 04 111 112 11 APPENDIX NOTES...
