c = 2: extremely inverse
•
Insensitive to DC component
•
Insensitive to harmonics
•
External 3 I
0
signal or 3 I
0
internally derived from the three-phase currents
•
Wider setting range than specified in BS 142
5.10.3
Inputs and outputs
5.10.3.1
CT/VT inputs
GUID-5EABFB3B-A068-4F53-A182-4442888C417C v1
•
Current
5.10.3.2
Binary inputs
GUID-B6536C2D-81FD-4FC1-9795-E7F169FB12B2 v1
•
Blocking
5.10.3.3
Binary outputs
GUID-E4B40A3A-E822-4016-9FA6-8FEED6DF0842 v1
•
Starting
•
Tripping
5.10.3.4
Measurements
GUID-781E4787-7BED-4D41-B2BB-44121AACEE17 v1
•
Neutral current
5.10.4
Function settings
GUID-E3F8BFC3-6B93-47A9-98DE-2C0730B455EA v1
Table 91: Inverse time earth fault overcurrent function - settings
Text
Unit
Default
Min
Max
Step
ParSet 4..1
P1
(Select)
c-Setting
1.00
(Select)
k1-Setting
s
013.5
0.01
200.0
0.01
IStart
IB
1.10
1.00
4.00
0.01
tmin
s
00.0
00.0
10.0
0.1
NrOfPhases
1
1
3
2
CurrentInp
CT/VT-Addr
0
IB-Setting
IN
1.00
0.04
2.50
0.01
BlockInp
BinaryAddr
Always off
Trip
SignalAddr
Start
SignalAddr
1MRK 505 406-UEN B
Section 5
Bay protection functions
Bay protection functions REB500
169
Technical manual
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