Checking The Operation Of The Du/Dt And Di/Dt Based Function; Completing The Test - ABB Relion 650 Series Commissioning Manual

Section 5
Testing functionality
5.6.2.4
5.6.2.5
68
×
3 U = U + U
0 L1 L2
IEC00000276 V1 EN
Where:
U , U and U
L1 L2 L3
IEC00000275 V1 EN
4. Compare the result with the set value (consider that the set value 3U0> is in
percentage of the base voltage of the zero sequence operating voltage.

Checking the operation of the du/dt and di/dt based function

Check the operation of the du/dt and di/dt based function, if included in the IED.
Procedure
1. Simulate normal operating conditions with the three-phase currents in phase
with their corresponding phase voltages and with all of them equal to their
rated values.
2. Connect the nominal dc voltage to the CBCLOSED binary input.
3. Change the voltages and currents in all three phases simultaneously.
The voltage change should be greater then set DU> and the current change
should be less than the set DI<.
• The BLKU and BLKZ signals appear without any time delay. The
BLKZ signal will be activated , only if the internal deadline detection is
not activated at the same time.
• 3PH should appear after 5 seconds, if the remaining voltage levels are
lower than the set UDLD<VDLDPU of the DLD function.
4. Apply normal conditions as in
The BLKU, BLKZ and 3PH signals should reset, if activated, see
5. Change the voltages and currents in all three phases simultaneously.
The voltage change should be greater then set DU> and the current change
should be greater then the set DI<.
The BLKU, BLKZ and 3PH signals should not appear.
6. Disconnect the dc voltage to the CBCLOSED binary input.
7. Apply normal conditions as in
8. Repeat step 3 .
9. Connect the nominal voltages in all three phases and feed a current below the
operate level in all three phases.
10. Keep the current constant. Disconnect the voltage in all three phases
simultaneously.
The BLKU, BLKZ and 3PH signals should not appear.

Completing the test

Continue to test another function or end the testing by setting the parameter
TestMode to Off under Main menu/Tests/IED test mode/1:TESTMODE. If
+ U
L3
step 1 .
step 1 .
1MRK 511 209-UEN -
(Equation 16)
= the measured phase voltages.
step 3 .
REC650
Commissioning Manual