Vector shift and rate of change of frequency are two parallel criteria typically used
for detection of Loss of Mains.
Chosen protection criteria can be included in the Application Configuration tool to
create multicriteria loss of mains alarm or trip.
4.5.9.7
Signals
VVSPPAM Input signals
Table 862: VVSPPAM Input signals
Name
Type
Default
Description
U3P
SIGNAL
-
Three-phase voltages
BLOCK
BOOLEAN
0=False
Block signal for acti-
vating the blocking
mode
VVSPPAM Output signals
Table 863: VVSPPAM Output signals
Name
Type
Description
OPERATE
BOOLEAN
Operate
INT_BLKD
BOOLEAN
Protection function internally
blocked
4.5.9.8
VVSPPAM Settings
Table 864: VVSPPAM Group settings (Basic)
Parameter
Values (Range)
Unit
Step
Default
Description
Start value
2.0...30.0
deg
0.1
6.0
Start value for vec-
tor shift
Table 865: VVSPPAM Group settings (Advanced)
Parameter
Values (Range)
Unit
Step
Default
Description
Over Volt Blk value
0.40...1.50
xUn
0.01
1.20
Voltage above
which function
will be internally
blocked
Under Volt Blk value 0.15...1.00
xUn
0.01
0.80
Voltage below
which function
will be internally
blocked
Table 866: VVSPPAM Non group settings (Basic)
Parameter
Values (Range)
Unit
Step
Default
Description
Operation
1=on
5=off
1=on
Operation Off / On
Protection functions
1MRS759142 F
912
REX640
Technical Manual