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Table 71:
OOSPPAM (78) Output signals
Name
Type
Description
TRIP
BOOLEAN
Common trip, issued when either zone 1 or zone 2 trip
TRIPZ1
BOOLEAN
Zone 1 trip
TRIPZ2
BOOLEAN
Zone 2 trip
START
BOOLEAN
Set when measured impedance enters lens
characteristic
GENMODE
BOOLEAN
Generator rotates faster than the system during pole slip
MOTMODE
BOOLEAN
Generator rotates slower than the system during pole
slip
R
REAL
Real part of measured positive-sequence impedance %
of VBase/(sqrt(3)*IBase)
X
REAL
Imaginary part of measured positive-seq impedance %
of VBase/(sqrt(3)*IBase)
7.4.5
Settings
Table 72:
OOSPPAM (78) Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Disabled
Enabled
-
-
Disabled
Operation Enable/Disable
OperationZ1
Disabled
Enabled
-
-
Enabled
Operation Zone1 Enable/disable
ReachZ1
1.00 - 100.00
-
0.01
50.00
Percentage part of total forward impedance;
defines Z1 reach
OperationZ2
Disabled
Enabled
-
-
Enabled
Operation Zone2 Enable/disable
tBreaker
0.000 - 1.000
s
0.001
0.040
Breaker opening time; use default 0s value if it
is unknown
Table 73:
OOSPPAM (78) Group settings (advanced)
Name
Values (Range)
Unit
Step
Default
Description
NoOfSlipsZ1
1 - 20
-
1
1
Number of pole-slips in zone 1 required for
zone 1 trip
NoOfSlipsZ2
1 - 60
-
1
3
Number of pole-slips in zone 2 required for
zone 2 trip
tReset
1.000 - 60.000
s
0.001
6.000
Time without any slip required to completely
reset function
1MRK 502 048-UUS A
Section 7
Impedance protection
175
Technical manual
Summary of Contents for 650 series
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