ABB ret650 - Monitored Data; Operation Principle

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