9.5.3
Function block
ANSI07000033 -3-en.vsd
STEFPHIZ (59THD)
NEUTVOLT*
TERMVOLT*
52A
BLOCK
BLOCK3RD
BLOCKVN
TRIP
TRIP3H
TRIP_VN
PICKUP
PU_3H
PU_VN
DV3
BV3
ANSI07000033 V3 EN
Figure 143:
STEFPHIZ (59THD) function block
9.5.4
Signals
Table 178:
STEFPHIZ (59THD) Input signals
Name
Type
Default
Description
NEUTVOLT
GROUP
SIGNAL
-
Voltage connection neutral side
TERMVOLT
GROUP
SIGNAL
-
Open-Delta connection on Terminal side
52a
BOOLEAN
1
Input 1 (TRUE) means breaker between gen. & tr. is
closed
BLOCK
BOOLEAN
0
Complete block of the stator ground fault protecion
function
BLOCK3RD
BOOLEAN
0
Block of the 3rd harmonic-based parts of the protection
BLOCKVN
BOOLEAN
0
Block of the fund. harmonic-based part of the protection
Table 179:
STEFPHIZ (59THD) Output signals
Name
Type
Description
TRIP
BOOLEAN
Main, common trip command
TRIP3H
BOOLEAN
Trip by one of two 3rd harmonic voltage-based prot.
TRIP_VN
BOOLEAN
Trip by fund. freq. neutral over-voltage protection
PICKUP
BOOLEAN
Main, common pick up signal
PU_3H
BOOLEAN
Start by one of two 3rd harmonic voltage-based prot.
PU_VN
BOOLEAN
Pick up signal by fund. freq. neutral over-voltage prot.
DV3
REAL
Diff. between 3rd harm. volt. at both sides of gen.
BV3
REAL
Bias voltage, a part of UN3
1MRK 502 048-UUS A
Section 9
Voltage protection
311
Technical manual