Rev.17
19/119
4.
PROTECTION FUNCTIONS
4.1.
50 Function. Phase instantaneous phase overcurrent
This protection function can be set by using three parameters:
Function
Description
Minimum
Maximum
Step
Unit
Default
50
Phase instantaneous overcurrent
Permission
-
-
Yes/No
-
No
Tap
0,10
30,00
0,01
I nominal
5,00
Operating time
0,02
300,00
0,01
s
0,2
The operating time is independent from the operating current flowing through the device, so if the
phase current exceeds its predetermined value for an equal or greater amount of time than this pre-set
value, the protection function activates (trips) and does not reset itself until the value of the phase
drops below the point of current tap.
The function activates at 100% of the pre-set input and deactivates at 95%. The reset is
instantaneous.
The accuracy of the operating time is equal to the pre-set time ±30ms or ±0.5% (whichever is greater).
4.2.
50/51 Function. Phase inverse time overcurrent
This protection function can be set by using five parameters
:
Function
Description
Minimum
Maximum
Step
Unit
Default
50/51
Phase inverse time overcurrent
Permission
-
-
Yes/No
-
No
Curve
-
-
(1*)
-
IEC Extremely Inverse
Dial
0,02
1,25
0,01
-
1,25
Tap
0,10
7,00
0,01
Inominal
1,00
Operating time
0,02
300,00
0,01
s
0,2
(1*) IEC Inverse, IEC Very inverse, IEC Extremely inverse, Defined time, IEEE Inverse, IEEE Very inverse, IEEE Extremely
inverse
Summary of Contents for SIA-F
Page 7: ...www fanox com Rev 17 7 119 2 DIMENSIONS AND CONNECTION DIAGRAMS 2 1 Frontal view...
Page 8: ...www fanox com Rev 17 8 119 2 2 Case dimensions The dimensions are in mm CUT OUT PATTERN...
Page 9: ...www fanox com Rev 17 9 119 2 3 Connection diagram 3 Phase CT and neutral CT Connection...
Page 10: ...www fanox com Rev 17 10 119 3 Phase CT and residual neutral Connection...
Page 34: ...www fanox com Rev 17 34 119...
Page 35: ...www fanox com Rev 17 35 119...
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Page 118: ...www fanox com Rev 17 118 119 NOTES...
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