Test Of Point Re (R Fwdr , X Fwdx ) - ABB RET670 Commissioning Manual

1MRK 504 165-UEN A
11.4.12.2
Transformer protection RET670 2.2 IEC
Commissioning manual
Testing functionality by secondary injection
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
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.
Test of point RE (R
FwdR
The trajectory of the impedance does not enter the lens
characteristic.
Preliminary steady state test at 50 Hz
• 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
VT s
,
V 1 1 . V
= × ×
ts t FwdZ ,
V
VT p ,
EQUATION14057 V1 EN-US
, X )
FwdX
0 1 .
1 1 11931 . 95 1 .
= × × =
13 8 .
Section 11
GUID-1752CE04-7C0F-4D37-9602-B22D8096DD2D v1
GUID-911D370F-8767-4D6C-9621-8663DD26006C v1
GUID-5C5E9BEB-AA60-474E-ACEC-B972ACFE6FA2 v1
GUID-8F95CCCC-3282-48E8-9F5E-3F3E77CCCAAE v1
V
(Equation 17)
151