6.8.4 Signals
Table 73: STBPTOC Input signals
Name
Type Default Description
I3P GROUP
SIGNAL
- Three phase group signal for current inputs
BLOCK BOOLEAN 0 Block of function
RELEASE BOOLEAN 0 Release of stub protection
Table 74: STBPTOC Output signals
Name Type Description
TRIP BOOLEAN General trip signal
START BOOLEAN General start signal
6.8.5 Settings
Table 75: STBPTOC Group settings (basic)
Name
Values (Range) Unit Step Default Description
Operation Off
On
- - Off Operation Off / On
I> 1 - 2500 %IB 1 200 Operate current level in % of IBase
Table 76: STBPTOC 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
6.8.6 Monitored data
Table 77: STBPTOC Monitored data
Name
Type Values (Range) Unit Description
IL1 REAL - A Current in phase L1
IL2 REAL - A Current in phase L2
IL3 REAL - A Current in phase L3
6.8.7 Operation principle
The sampled analog phase currents are pre-processed in a discrete Fourier filter (DFT)
block. From the fundamental frequency components of each phase current the RMS
value of each phase current is derived. These phase current values are fed to a
1MRK 511 287-UEN A Section 6
Current protection
135
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