Name
Values (Range)
Unit
Step
Default
Description
CurrMult_OC2
1.0 - 10.0
-
0.1
2.0
Multiplier for current operate level for step
2 (OC2)
tDef_OC2
0.00 - 6000.00
s
0.01
0.50
Independent (definite) time delay for step
2 (OC2)
DirMode_OC2
Non-directional
Forward
Reverse
-
-
Non-directional
Directional mode of step 2 (non-
directional, forward, reverse)
DirPrinc_OC2
I&U
IcosPhi&U
-
-
I&U
Measuring on I & U or IcosPhi & U for step
2 (OC2)
ActLowVolt2_VM
Non-directional
Block
-
-
Block
Low votlage level action for step 2 (Non-
directional, Block, Memory)
Table 127:
DNSPTOC Non group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
GlobalBaseSel
1 - 6
-
1
1
Selection of one of the Global Base Value
groups
8.9.6
Monitored data
Table 128:
DNSPTOC Monitored data
Name
Type
Values (Range)
Unit
Description
CURRENT
REAL
-
A
Measured current value
VOLTAGE
REAL
-
kV
Measured voltage value
UIANGLE
REAL
-
deg
Angle between voltage
and current
8.9.7
Operation principle
Negative sequence based overcurrent function (DNSPTOC) has two settable current
levels, setting parameters
StartCurr_OC1
and
StartCurr_OC2
. Both features have
definite time characteristics with settings
tDef_OC1
and
tDef_OC2
respectively. It is
possible to change the direction of these steps to
forward
,
reverse
or
non-directional
by setting parameters
DirMode_OC1
and
DirMode_OC2
. At too low polarizing
voltage the overcurrent feature can be either blocked or non-directional. This is
controlled by settings
ActLowVolt1_VM
and
ActLowVolt2_VM
.
Section 8
1MRK 504 135-UEN A
Current protection
200
Technical manual
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