Rev.01
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8.4 Function 60CTS. Phase CT Supervision
This protection function can be set by using the following parameters:
Function
Description
Minimum
Maximum
Step
Unit
Default
60CTS
Phase CT Supervision
Function Enable
-
-
Yes/No
-
No
Time Delay
0.020
300.000
0.001
s
5
Current transformer supervision is provided to detect the loss of
one
of the phases.
If a current lower than 0.8% of the nominal current is detected in one phase during more than 40ms, the
adjusted time starts to count, and the trip occurs after the set time delay.
The reset is instantaneous when a current higher than 8% of nominal current is detected.
The accuracy of the time delay is equal to the initial 40ms plus the preset time ±30ms or ±0.5%
(whichever is greater).
8.5 Function 60VTS. Phase VT supervision
This protection function can be set by using the following parameters:
Function
Description
Minimum
Maximum
Step
Unit
Default
60VTS
Phase VT Supervision
Function Enable
-
-
Yes/No
-
No
Time Delay
0.020
300.000
0.001
s
5.000
V1 Tap
0.08
2.00
0.01
xUn
0.75
V2 Tap
0.08
2.00
0.01
xUn
0.30
VP Tap
0.08
2.00
0.01
xUn
0.60
I1 Tap
0.010
20.000
0.001
xIn
0.750
I2 Tap
0.010
20.000
0.001
xIn
0.100
3I0 Tap
0.010
20.000
0.001
xIn
0.100
When a situation of loss of one or more of the VT signals occurs, the following conditions develop:
•
There will be a drop in the positive sequence voltage accompanied by an increase in the
negative sequence voltage magnitude. The magnitude of this drop depends on the number of
phases impacted by a fuse failure.
•
In case of a loss of VT signal and contrary to a fault condition, there should not be any change
in the current's magnitudes and phases. Therefore, the negative and zero sequence currents
should remain below a small tolerance value. A fault condition be distinguished from a loss of
Summary of Contents for SIL-G
Page 1: ...USER S MANUAL USER S MANUAL SIL G Feeder Relay...
Page 8: ...www fanox com Rev 01 8 151 2 3 Connection diagrams 2 3 1 Analog current connections...
Page 10: ...www fanox com Rev 01 10 151 3 VT configuration phase neutral...
Page 11: ...www fanox com Rev 01 11 151 3 VT configuration phase neutral residual voltage...
Page 12: ...www fanox com Rev 01 12 151 3VT configuration phase phase residual voltage...
Page 13: ...www fanox com Rev 01 13 151 2VT configuration phase phase residual voltage...
Page 14: ...www fanox com Rev 01 14 151 3 VT configuration phase neutral phase B line voltage...
Page 27: ...www fanox com Rev 01 27 151 Dimensions 175x175x150 3 3 Functional diagram...
Page 28: ...www fanox com Rev 01 28 151...
Page 69: ...www fanox com Rev 01 69 151 General trip...
Page 88: ...www fanox com Rev 01 88 151...
Page 89: ...www fanox com Rev 01 89 151...
Page 90: ...www fanox com Rev 01 90 151...
Page 95: ...www fanox com Rev 01 95 151 Time Minutes Seconds Milliseconds...
Page 150: ...www fanox com Rev 01 150 151 NOTES...
Page 151: ...www fanox com Rev 01 151 151...
