this value is equal to:
(
)
injected
injected
injected
injected
L
L
xy
cp
U
U
U
U
I
j
j
R
jX
X
X
=
-
-
+
×
+
æ
ö
ç
÷
è
ø
14. Repeat step 13 for phases L2 and L3.
15. Set
OperationOV
to
On
.
16. Connect the test set for three-phase current injection and three-phase voltage to
the appropriate IED terminals.
17. Inject symmetrical phase voltages equal to the rated voltage.
18. Increase the injected voltage in phase L1 and note the operated value (start
value) of the function.
19. Decrease the voltage slowly and note the reset value.
20. Connect a trip output contact to a timer.
21. Increase stepwise the injected voltage to 110% of the operate level, and check
the time delay.
22. Check that all trip and start contacts operate according to the configuration
(signal matrices).
23. Finally check that start and trip information is stored in the event memory.
Repeat steps 17 – 22 for phases L2 and L3.
If voltage compensation will be used do the following steps:
24. Set
EnShuntReactor
to
On
and activate input signal SWIPOS.
25. Check that the line impedance (R1 and X1) and reactor impedance (Xc) are set
to the correct values.
26. Inject symmetrical phase voltages equal to 120% of the rated voltage.
27. Increase the injected current (same phase angle as the injected voltage) in phase
L1 from zero and note the operated value (start value) of the function. Check that
this value is equal to:
(
)
injected
injected
injected
injected
L
L
xy
cp
U
U
U
U
I
j
j
R
jX
X
X
=
-
-
+
×
+
æ
ö
ç
÷
è
ø
Completing the test
Continue to test another function or end the test by changing the
TestMode
setting to
Off
. Restore connections and settings to their original values, if they were changed for
testing purposes.
10.11.7.3
Sudden change in current variation SCCVPTOC
Prepare the IED for verification of settings as outlined in section
and
in this chapter.
1.
Set
Operation
to
On
.
2.
Connect the test set for three-phase current injection to the appropriate IED
terminals.
3.
Inject symmetrical phase currents equal to half the rated current.
1MRK 506 355-UEN A
Section 10
Testing functionality by secondary injection
Line distance protection REL670 2.1 IEC
223
Commissioning manual
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