ABB REG670 - Page 456

VDepFact *StartCurr/100*IBase) and (UHighLimit/100*UBase; StartCurr/
100*IBase). In the first point the factor 0.25 that multiply UBase cannot be
changed.
UBase
Start level of the current
StartCurr
VDepFact * StartCurr
UHighLimit
0,25
IEC10000123-2-en.vsd
IEC10000123 V2 EN
Figure 208: Example for start level of the current variation as function of
measured voltage magnitude in Slope mode of operation
• Voltage controlled overcurrent (when setting parameter VDepMode = Step); the
start level of the overcurrent stage changes according to the Figure 209.
UBase
Start level of the current
StartCurr
VDepFact * StartCurr
UHighLimit
IEC10000124-2-en.vsd
IEC10000124 V2 EN
Figure 209: Example for start level of the current variation as function of
measured voltage magnitude in Step mode of operation
Section 8 1MRK502052-UEN B
Current protection
450
Technical manual