ABB REG670 - Settings

8.13.1.4 Settings
Table 237: AEGPVOC Group settings (basic)
Name
Values (Range) Unit Step Default Description
Operation Off
On
- - Off Operation Off / On
I> 5 - 900 %IB 1 120 Operate phase current level in % of IBase
tOC 0.000 - 60.000 s 0.001 0.030 Trip time delay for over current level
ArmU< 2 - 150 %UB 1 50 Under-voltage level to arm protection in %
of UBase
tArm 0.000 - 60.000 s 0.001 5.000 Time delay to arm protection with U< level
DisarmU> 2 - 200 %UB 1 80 Over-voltage level to disarm protection in
% of UBase
tDisarm 0.000 - 60.000 s 0.001 0.500 Time delay to disarm protection with U>
level
Table 238: AEGPVOC Non group settings (basic)
Name Values (Range) Unit Step Default Description
GlobalBaseSel 1 - 12 - 1 1 Selection of one of the Global Base Value
groups
8.13.1.5 Monitored data
Table 239: AEGPVOC Monitored data
Name
Type Values (Range) Unit Description
IMAX REAL - A Maximum value of
current
UMAX REAL - kV Maximum value of phase
to phase voltage
8.13.1.6 Operation principle
Accidental energizing protection for synchronous generator AEGPVOC function is
connected to three phase current input either from the generator terminal side or from
generator neutral point side and three phase voltage from the generator terminals. The
maximum of the three phase-to-phase voltages and maximum of the three phase
currents are measured.
When the maximum phase-to-phase voltage is less than the ArmU< for the period
tArm, it is ensured that the generator is off-line. The ARMED signal will initiate the
overcurrent function. If the calculated maximum current of the three phases is larger
than I> for the period tOC then the TRIP signal becomes activated. Also START
signal becomes activated when overcurrent is detected.
Section 8 1MRK502052-UEN B
Current protection
444
Technical manual