ABB RELION REX640 Technical Manual page 551

1MRS759142 F
1.
2.
3.
4.2.8.7 Signals
H3EFPSEF Input signals
Table 604: H3EFPSEF Input signals
Name
U3P
URES
UNEUT
BLOCK
GCB_CLOSED
H3EFPSEF Output signals
Table 605: H3EFPSEF Output signals
Name
OPERATE
START
INT_BLKD
4.2.8.8 H3EFPSEF Settings
Table 606: H3EFPSEF Group settings (Basic)
Parameter Values (Range)
Beta 0.50...10.00
Voltage N 3.H Lim 0.005...0.200
Operate delay time 20...300000
REX640
Technical Manual
For a particular value of
with the generator in the no-load condition and the circuit breaker in the closed
position.
With the same condition, the third harmonic neutral voltage with the circuit
breaker in the open position is measured.
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.
Type
SIGNAL
SIGNAL
SIGNAL
BOOLEAN
BOOLEAN
Unit
xUn
ms
Beta the third harmonic neutral voltage is measured
Default
-
-
-
0=False
0=False
Type
BOOLEAN
BOOLEAN
BOOLEAN
Step
0.01
0.001
10
Protection functions
Description
Three-phase voltages
Residual voltage
Analog input
Block signal for acti-
vating the blocking
mode
Generator CB in
closed position
Description
Operate
Start
Protection internally blocked
Default Description
3.00 Portion of neutral
side 3rd harmonic
used as bias
0.010 Start value for 3rd
harmonic residual
undervoltage pro-
tection
20 Operate delay time
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