MC30-R2
Doc. N°
MO-0462-ING
Copyright 2012
FW: 1290.37.01.x
Date
06.09.2022
Rev.
1
Pag.
15
of
38
3.5 - Io> (1F51N) - First Earth Fault protection level
FuncEnab
→
Enable
[Disable / Enable]
Options
→
TCC
D
[D / A / B / C / I / VI / EI / MI / SI ]
→
BI
Disable
[Disable / Enable]
→
Trg
Enable
[Disable / Enable]
→
Sh1
No
[No / Yes]
→
Sh2
No
[No / Yes]
→
Sh3
No
[No / Yes]
→
Sh4
No
[No / Yes]
TripLev
→
Io>
0.01
Ion (0.01
4.00)
step 0.01
Ion
Timers
→
tIo>
0.05
s
(0.05
60.00)
step
0.01
s
Description of variables
FuncEnab
: If disable the function is disactivated
TCC
: Time current curves
D
= Independent Definite Time
A
= IEC A Inverse
B
= IEC B Very Inverse
C
= IEC C Extremely Inverse
MI
= IEEE Moderate Inverse Curve
VI
= IEEE Very Inverse Curve
I
= IEEE Inverse Curve
EI
= IEEE Extremely Inverse Curve
SI
= IEEE Short Inverse Curve
BI
: Operation controlled by Blocking Digital Input
Trg
: Function operation triggers the oscillographic wave form capture
(see § Oscillographic Recording)
Sh1
: Tripping of this function (1F51N) starts (Yes) or not (No) the first reclosure shot.
Sh2
: Tripping of this function (1F51N) starts (Yes) or not (No) the 2
nd
reclosure shot.
Sh3
: Tripping of this function (1F51N) starts (Yes) or not (No) the 3
rd
reclosure shot.
Sh4
: Tripping of this function (1F51N) starts (Yes) or not (No) the 4
th
reclosure shot.
Io>
: Minimum Zero Sequence Residual Current Pick-up level
tIo>
: Trip time delay
