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first action should be to split the network into two parts, after line protection action. If
this fails there should be operation of the generator PSPPPAM in zone 2, to prevent
further damages to the generator, shaft and turbine.
7.5.3
Function block
IEC10000045-1-en.vsd
PSPPPAM
I3P*
U3P*
BLOCK
BLKGEN
BLKMOTOR
EXTZONE1
TRIP
TRIP1
TRIP2
START
ZONE1
ZONE2
GEN
MOTOR
SFREQ
SLIPZOHM
SLIPZPER
UCOS
UCOSPER
IEC10000045 V1 EN
Figure 106:
PSPPPAM function block
7.5.4
Signals
Table 99:
PSPPPAM Input signals
Name
Type
Default
Description
I3P
GROUP
SIGNAL
-
Current group connection
U3P
GROUP
SIGNAL
-
Voltage group connection
BLOCK
BOOLEAN
0
Block of function
BLKGEN
BOOLEAN
0
Block operation in generating direction
BLKMOTOR
BOOLEAN
0
Block operation in motor direction
EXTZONE1
BOOLEAN
0
Extension of zone1 with zone2 region
Table 100:
PSPPPAM Output signals
Name
Type
Description
TRIP
BOOLEAN
Common trip signal
TRIP1
BOOLEAN
Trip1 after the N1Limit slip in zone1
TRIP2
BOOLEAN
Trip2 after the N2Limit slip in zone2
START
BOOLEAN
Common start signal
ZONE1
BOOLEAN
First slip in zone1 region
ZONE2
BOOLEAN
First slip in zone2 region
GEN
BOOLEAN
Generator is faster than the system
MOTOR
BOOLEAN
Generator is slower than the system
Table continues on next page
1MRK502052-UEN B
Section 7
Impedance protection
253
Technical manual
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