ABB REG316 4 Series Operating Instructions Manual page 654

ABB Switzerland Ltd
Utility Automation
Technical Data Func-
Technical Data Func-
tions (cont'd)
tions (cont'd)
Numerical generator protection
Table 37: Rotor earth fault protection (64R)
Features:
· Continuous supervision of the insulation level and calculation of the earthing (grounding) resistance
· Alarm and tripping values are entered resp. measured and displayed in kW
Settings:
Alarm stage
Delay
Tripping stage
Delay
R
ER
Coupling capacity
Reset ratio
Accuracy
Starting time
Functional requirements:
- total rotor earthing capacity
- rotor earthing resistance R
PR
- rotor earthing resistance R
ER
- coupling capacity
- time constant
The actual earthing resistance R
The 100% rotor earth fault protection function always requires an injection unit type REX010 and an injec-
tion transformer block type REX011 which are connected to the plant via coupling capacitors.
Table 38: Pole slip protection (78)
Features:
· Recording the pole wheel movements from 0.2 Hz to 8 Hz
· Differentiation of the pendulum center inside or outside of the generator-transformer block zone by two
independent tripping stages
· Adjustable warning angle for pole wheel movements
· Number of slips adjustable before tripping
Fig. 11 Characteristic of the function
Settings:
ZA (system impedance)
ZB (generator impedance)
ZC (impedance step 1)
Phi
warning angle
100 W to 25 kW in steps of 0.1kW
0.2 s to 60 s in steps of 0.1 s
100 W to 25 kW in steps of 0.1kW
0.2 s to 60 s in steps of 0.1 s
900 W to 5 kW in steps of 0.01kW
2 mF to 10 mF
110%
0.1 kW to 10 kW <10%
1.5 s
200 nF to 1mF
100 W to 500 W
900 W to 5 kW
4 mF to 10 m F
T = R , x C = 3 to 10 ms
ER
R have to be calculated in accordance with the User's Guide.
ER + PR
0 to 5.0 U /l
N N
-5.0 to 0 U /l
N N
0 to 5.0 U /l
N N
60° to 270° in steps of 1°
0° to 180° in steps of 1°
REG316*4
1MRK502004-Ben
in steps of 0.001
in steps of 0.001
in steps of 0.001
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