•
49.5 Hz for the test as generator in the quadrant 1 and 2 of the R-X plane
•
50.5 Hz for the test as generator in the quadrant 3 and 4 of the R-X plane
When the trajectory of the impedance, that is seen by the protection function,
traverses the lens characteristic then a pole slipping is detected. The present
procedure avoids tests of points of the line SE-RE that are too close to the R-
axis because in that case the voltage is close to zero and, therefore, the
impedance may approach a not defined quantity 0/0.
The accuracy of the impedance reach is ±2% of the base impedance; that is
considered while evaluating the test results.
For the test as motor the frequency current may have 50.5 Hz in the quadrant 1
and 2 of the R-X plane and 49.5 Hz in the quadrant 3 and 4.
Verifying the settings by secondary injection
GUID-1752CE04-7C0F-4D37-9602-B22D8096DD2D v1
It is advised to connect the analog output channels of the function block OOSPPAM to the
internal disturbance recorder (and in particular to the function block A4RADR) in order to
perform a better analysis of the tests.
If the device is in test mode, the recording of the disturbances are enabled by the setting in
Main menu/Settings/IED Settings/Monitoring/Disturbance report/DisturbanceReport/
DRPRDRE:1: set the parameter
OpModeTest to On.
1.
Check the Application Configuration: verify that hardware voltage and current channels of
the IED are properly connected to SMAI function blocks, and that the proper analog
outputs of SMAI’s are connected to the analog inputs of the function block OOSPPAM.
2.
Connect three-phase voltage channels of the test set to the appropriate IED terminals.
3.
Connect in parallel two groups of three-phase currents of the test set to the appropriate
IED terminals.
4. Connect the appropriate trip output of the IED to the input channel of the test set that
monitors the trip.
5. Go to Main menu/Settings/IED Settings/Impedance protection/OutOfStep(78,Ucos)/
OOSPPAM(78,Ucos):1, and make sure that the function is enabled, that is,
Operation is set
to
On.
12.4.11.2
Test of point RE (R
FwdR
, X
FwdX
)
GUID-911D370F-8767-4D6C-9621-8663DD26006C v1
The trajectory of the impedance does not enter the lens characteristic.
GUID-5C5E9BEB-AA60-474E-ACEC-B972ACFE6FA2 v1
Preliminary steady state test at 50 Hz
GUID-8F95CCCC-3282-48E8-9F5E-3F3E77CCCAAE v1
•
Go to Main menu/Test/Function status/Impedance protection/OutOfStep(78,Ucos)/
OOSPPAM(78,Ucos):1/Outputs to check the available service values of the function block
OOSPPAM.
•
Apply the following three-phase symmetrical quantities (the phase angle is related to
phase L1):
V
V
V
V
V
ts
t FwdZ
VT s
VT p
=
×
×
=
×
×
=
1 1
1 1 11931
0 1
13 8
95 1
.
.
.
.
.
,
,
,
EQUATION14057 V1 EN-US
(Equation 17)
1MRK 502 067-UEN B
Section 12
Testing functionality by secondary injection
135
Commissioning manual
