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Generator protection
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1MRK 502 043-UUS B
8.8.5
Table 120:
AEGGAPC (50AE) Group settings (basic)
Name
Values (Range)
Operation
Disabled
Enabled
IPickup
2 - 900
tOC
0.000 - 60.000
27_pick_up
2 - 200
tArm
0.000 - 60.000
59_Drop_out
2 - 200
tDisarm
0.000 - 60.000
Table 121:
AEGGAPC (50AE) Non group settings (basic)
Name
Values (Range)
GlobalBaseSel
1 - 6
8.8.6
8.8.7
Technical Manual

Settings

Unit
Step
-
-
%IB
1
s
0.001
%VB
1
s
0.001
%VB
1
s
0.001
Unit
Step
-
1
Monitored data
Table 122:
AEGGAPC (50AE) Monitored data
Name
Type
IMAX
REAL
VMAX
REAL
Operation principle
Accidental energizing protection for synchronous generator AEGGAPC (50AE)
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 27_pick_up for the period
tArm, it is ensured that the generator is off-line. The Enabled signal will initiate the
arm and enable the overcurrent function. If the calculated maximum current of the
Default
Description
Disabled
Disable/Enable Operation
120
Phase current pickup in % of IBase
0.030
Trip time daly for overcurrent level
50
Undervoltage level to arm protection in % of
Vbase
5.000
Time delay to arm protection with
undervoltage pickup
80
Over voltage level to disarm protection in %
of Vbase
0.500
Time delay to disarm protection when voltage
greater than drop out level
Default
Description
1
Selection of one of the Global Base Value
Groups
Values (Range)
Unit
-
A
-
kV
Section 8
Current protection
Description
Maximum value of current
Maximum value of phase to
phase voltage
235

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