ABB Relion 650 Series REB650, Technical Manual

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Table 33: OC4PTOC 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
MeasType DFT
RMS
- - DFT Selection between DFT and RMS
measurement
7.1.6 Monitored data
Table 34: OC4PTOC Monitored data
Name Type Values (Range) Unit Description
DIRL1 INTEGER 1=Forward
2=Reverse
0=No direction
- Direction for phase L1
DIRL2 INTEGER 1=Forward
2=Reverse
0=No direction
- Direction for phase L2
DIRL3 INTEGER 1=Forward
2=Reverse
0=No direction
- Direction for phase L3
IL1 REAL - A Current in phase L1
IL2 REAL - A Current in phase L2
IL3 REAL - A Current in phase L3
7.1.7 Operation principle
The Four step phase overcurrent protection 3-phase output OC4PTOC is divided into
four different sub-functions, one for each step. For each step
x , where x is step 1, 2,
3 and 4, an operation mode is set by DirModex : Off / Non-directional / Forward /
Reverse .
The protection design can be divided in four parts:
• The direction element
• The harmonic Restraint Blocking function
• The four step over current function
• The mode selection
If VT inputs are not available or not connected, setting parameter
DirModex shall be left to default value, Non-directional .
1MRK 505 288-UEN A
Section 7
Current protection
83
Technical manual