Signals; Settings - ABB RELION REX640 Technical Manual

Section 4
Protection functions
4.2.8.7
4.2.8.8
Table 552: H3EFPSEF Group settings (Basic)
Parameter
Beta
Voltage N 3.H Lim
Operate delay time
Table 553: H3EFPSEF Group settings (Advanced)
Parameter
Voltage selection
CB open factor
520
1. For a particular value of Beta the third harmonic neutral voltage is measured with
the generator in the no-load condition and the circuit breaker in the closed
position.
2. With the same condition, the third harmonic neutral voltage with the circuit
breaker in the open position is measured.
3. CB open factor should be set equal to the ratio of the third harmonic neutral
voltage measured with the circuit breaker in the closed position to that in the open.

Signals

Table 550: H3EFPSEF Input signals
Name
U3P
URES
UNEUT
BLOCK
GCB_CLOSED
Table 551: H3EFPSEF Output signals
Name
OPERATE
START
INT_BLKD

Settings

Values (Range) Unit
0.50...10.00
0.005...0.200 xUn
20...300000 ms
Values (Range) Unit
1=No voltage
2=Uo
4=Phase A
5=Phase B
6=Phase C
1.00...10.00
Type Default Description
SIGNAL - Three-phase voltages
SIGNAL - Residual voltage
SIGNAL - Analog input
BOOLEAN 0=False Block signal for activating the blocking mode
BOOLEAN 0=False Generator CB in closed position
Type Description
BOOLEAN Operate
BOOLEAN Start
BOOLEAN Protection internally blocked
Step Default
0.01 3.00
0.001 0.010
10 20
Step Default
2=Uo
0.01 1.00
1MRS759142 C
Description
Portion of neutral side 3rd harmonic used
as bias
Start value for 3rd harmonic residual
undervoltage protection
Operate delay time
Description
Type of voltage connection available at
generator terminal
Multiplication factor for beta when CB is in
open condition
Technical Manual
REX640