Table 108: DNSPTOC (46) 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
6.12.6 Monitored data
Table 109: DNSPTOC (46) 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
6.12.7 Operation principle
Negative sequence based overcurrent function (DNSPTOC, 46) has two settable current
levels, setting parameters PickupCurr_OC1 and PickupCurr_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.
6.12.8 Technical data
Table 110: DNSPTOC (46) Technical data
Function
Range or value Accuracy
Operate current (2.0 - 200.0) % of
IBase
± 1.0% of I
r
at I <I
n
± 1.0% of I at I > I
n
Reset ratio > 95 % -
Low polarizing voltage level (0.0 - 5.0) % of
VBase
< ± 0.5% of V
n
Relay characteristic angle (-180 - 180) degrees ± 2.0 degrees
Relay operate angle (1 - 90) degrees ± 2.0 degrees
Timers (0.00 - 6000.00) s ± 0.5% ± 25 ms
Operate time, non-directional 30 ms typically at 0 to 2 x I
set
20 ms typically at 0 to 10 x I
set
-
Reset time, non-directional 40 ms typically at 2 to 0 x I
set
-
Table continues on next page
1MRK 511 287-UUS A Section 6
Current protection
165
Technical manual
To Next Page
Loading...
Need help?
General
