Name
Type
Description
X
REAL
Imaginary part of measured positive-seq impedance %
of VBase/(sqrt(3)*IBase)
SLIPFREQ
REAL
Slip frequency in Hz
ROTORANG
REAL
Rotor angle as estimated by the out-of-step function
VCOSPHI
REAL
Estimated Ucos(Phi) voltage during pole slip, in V
7.2.5
Settings
Table 85:
OOSPPAM (78) Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Disabled
Enabled
-
-
Disabled
Operation Disabled/Enabled
OperationZ1
Disabled
Enabled
-
-
Enabled
Operation Zone1 Enable/Disable
ReachZ1
1.00 - 100.00
% ZFw
0.01
50.00
Percentage part of total forward impedance;
defines Z1 reach
OperationZ2
Disabled
Enabled
-
-
Enabled
Operation Z2 Enable/Disable
tBreaker
0.000 - 1.000
s
0.001
0.040
Breaker opening time; use default 0s value if it
is unknown
Table 86:
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
Table 87:
OOSPPAM (78) Non group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
GlobalBaseSel
1 - 12
-
1
1
Selection of one of the Global Base Value
groups
ForwardR
0.00 - 1000.00
%ZB
0.01
1.00
Real part of total forward impedance for Z2, in
% of VBase/(sqrt(3)*IBase)
ForwardX
0.00 - 1000.00
%ZB
0.01
10.00
Imag. part of total forward impedance for Z2, in
% of VBase/(sqrt(3)*IBase)
Table continues on next page
1MRK 511 365-UUS A
Section 7
Impedance protection
Phasor measurement unit RES670 2.1 ANSI
157
Technical manual
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