Function Block; Signals - ABB REG650 Technical Manual

1MRK 502 034-UEN -
8.5.3
8.5.4
Technical Manual
x E3 x E3
N N N
RN RN
uN uN
x
Samples of the
neutral voltage
from which the
fundamental and
3rd harmonic
Neutral point fundamental frequency
voltages are
filtered out over- voltage protection 10% – 100%
3rd harmonic
Differential
differential
0% – 30%
0% - 30%
IEC10000202 V1 EN
Figure 125: Protection principles for STEFPHIZ function

Function block

STEFPHIZ
NEUTVOLT* TRIP
TERMVOLT* TRIP3H
CBCLOSED TRIPUN
BLOCK START
BLOCK3RD START3H
BLOCKUN STARTUN
DU3
BU3
IEC07000033-3-en.vsd
IEC07000033 V3 EN
Figure 126: STEFPHIZ function block

Signals

Table 150: STEFPHIZ Input signals
Name Type
NEUTVOLT GROUP
SIGNAL
TERMVOLT GROUP
SIGNAL
CBCLOSED BOOLEAN
BLOCK BOOLEAN
BLOCK3RD BOOLEAN
BLOCKUN BOOLEAN
stator winding stator winding
(1- x) E3 (1- x) E3
Rf Rf
1 - x 1 - x
1 or 100 %
over-voltage protection 5% - 100%
Default Description
- Voltage connection neutral side
- Open-Delta connection on Terminal side
1 Input 1 (TRUE) means breaker between gen. & tr.
is closed
0 Complete block of the stator earth fault protecion
function
0 Block of the 3rd harmonic-based parts of the
protection
0 Block of the fund. harmonic-based part of the
protection
Section 8
Voltage protection
CB 1 may not exist CB 1 may not exist
CB 1 CB 1
T T
Transformer
uT uT
Samples of the
terminal voltage
from which the
3rd harmonic
voltage is filtered
out
IEC10000202-1-en.vsd
CB 2 CB 2
247