9.6.4
Signals
Table 298:
STEFPHIZ Input signals
Name
Type
Default
Description
U3PNEUT
GROUP
SIGNAL
-
Voltage connection neutral side
U3PTERM
GROUP
SIGNAL
-
Open-Delta connection on Terminal side
CBCLOSED
BOOLEAN
1
TRUE means breaker between gen. & trafo is
closed
BLOCK
BOOLEAN
0
Complete block of the stator earth fault protecion
function
BLOCK3RD
BOOLEAN
0
Block of the 3rd harmonic-based parts of the
protection
BLOCKUN
BOOLEAN
0
Block of the fund. harmonic-based part of the
protection
Table 299:
STEFPHIZ Output signals
Name
Type
Description
TRIP
BOOLEAN
Main, common trip command
TRIP3H
BOOLEAN
Trip by one of two 3rd harmonic voltage-based prot.
TRIPUN
BOOLEAN
Trip by fund. freq. neutral over-voltage protection
START
BOOLEAN
Main, common start signal
START3H
BOOLEAN
Start by one of two 3rd harmonic voltage-based
prot.
STARTUN
BOOLEAN
Start signal by fund. freq. neutral over-voltage prot.
UT3
REAL
Mag. of 3rd harm. voltage at generator terminal
side, Volts
UN3
REAL
Mag. of 3rd harm. voltage at generator neutral side,
Volts
E3
REAL
Total induced stator 3rd harmonic voltage, primary
Volts
ANGLE
REAL
Angle between 3rd harmonic votage phasors,
radians
DU3
REAL
Diff. between 3rd harm. volt. at both sides of gen.,
Volts
BU3
REAL
Bias voltage, a part of voltN3rdHarmonic, primary
Volts
UN
REAL
Fund. frequency voltage at generator neutral,
primary Volts
Section 9
1MRK502052-UEN B
Voltage protection
534
Technical manual
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