VAMP 59 - Page 61

Technical description
2 Protection functions
2.7 Directional earth fault
protection I0φ> (67N)
VM59.EN001
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61
Parameter
Value
Unit
Description
Note
IoRes
pu
Resistive part of I
0
(only when
"InUse"=Res)
IoCap
pu
Capacitive part of I
0
(only
when "InUse"=Cap)
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
Uo>
%
Pick-up setting for U
0
Set
Uo
%
Measured U
0
Curve
DT
IEC
IEEE
IEEE2
RI
PrgN
Delay curve family:
Definite time
Inverse time. See chapter
2.14.
Set
Type
DT
NI
VI
EI
LTI
Paramet
ers
Delay type.
Definite time
Inverse time. See chapter
2.14.
Set
t>
s
Definite operation time (for
definite time only)
Set
k>
Inverse delay multiplier (for
inverse time only)
Set
Mode
ResCap
Sector
Undir
High impedance earthed nets
Low impedance earthed nets
Undirectional mode
Set
Offset

Angle offset (MTA) for RecCap
and Sector modes
Set
Sector
Default
= 88
±°
Half sector size of the trip
area on both sides of the offset
angle
Set
ChCtrl
Res
Cap
DI1, DI2
VI1..4
Res/Cap control in mode
ResCap
Fixed to Resistive
characteristic
Fixed to Capacitive
characteristic
Controlled by digital input
Controlled by virtual input
Set