VAMP 265 - Page 66

2.7 Earth fault protection I0>
(50N/51N)
2 Protection functions
Technical description
66
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VM265.EN011
Parameter
Value
Unit
Description
Note
Io
Io2
IoCalc
IoPeak
Io2Peak
I‟oCalc
pu
The supervised value
according the parameter
"Input" below.
Io>
A
Pick-up value scaled to
primary value
Io>
pu
Pick-up setting relative to the
parameter "Input" and the
corresponding CT value
Set
Curve
DT
IEC
IEEE
IEEE2
RI
PrgN
Delay curve family:
Definite time
Inverse time. See chapter 2.13.
Set
Type
DT
NI
VI
EI
LTI
Parame-
ters
Delay type.
Definite time
Inverse time. See chapter 2.13.
Set
t>
s
Definite operation time (for
definite time only)
Set
k>
Inverse delay multiplier (for
inverse time only)
Set
Input
Io1
Io2
IoCalc
Io1Peak
Io2Peak
I‟oCalc
X1-7&8. See chapter 8
X1-9&10
IL1 + IL2 + IL3
X1-7&8 peak mode
X1-9&10 peak mode
I‟L1 + I‟L2 + I‟L3
Set
Intrmt
s
Intermittent time
Set
Dly20x
s
Delay at 20xIset
Dly4x
s
Delay at 4xIset
Dly2x
s
Delay at 2xIset
Dly1x
s
Delay at 1xIset
A, B, C, D,
E
User's constants for standard
equations. Type=Parameters.
See chapter 2.13.
Set
For details of setting ranges see chapter 9.3.
Set = An editable parameter (password needed)
C = Can be cleared to zero
F = Editable when force flag is on