Measuring The Trip Value For The Dead Line Detection Function; Checking The Operation Of The Dv/Dt And Di/Dt Based Function - ABB Relion 670 Series Commissioning Manual

1MRK 504 165-UUS Rev. J
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ANSIEQUATION00020 V1 EN-US
7. Compare the result with the set value of the zero-sequence trip current. Consider that the set value
3I0< is in percentage of the base current IBase.
11.10.2.4

Measuring the trip value for the dead line detection function

1. Apply three-phase voltages with their rated value and zero currents.
2. Decrease the measured voltage in one phase until the DLD1PH signal appears.
3. This is the point at which the dead line condition is detected. Check the value of the decreased
voltage with the set value VDLDPU (VDLDPU is in percentage of the base voltage VBase).
4. Apply three-phase currents with their rated value and zero voltages.
5. Decrease the measured current in one phase until the DLD1PH signal appears.
6. This is the point at which the dead line condition is detected. Check the value of the decreased
current with the set value IDLDPU (IDLDPU is in percentage of the base current IBase).
11.10.2.5

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

Check the operation of the dv/dt and di/dt based function if included in the IED.
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. Change the voltages and currents in all three phases simultaneously.
The voltage change must be higher than the set value DVPU and the current change must be lower
than the set value DIPU.
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•
3. Apply normal conditions as in step 1.
The BLKV, BLKZ and 3PH signals should reset, if activated, see step
4. Change the voltages and currents in all three phases simultaneously.
The voltage change must be higher than the set value DVPU and the current change must be
higher than the set value DIPU.
The BLKV, BLKZ and 3PH signals should not appear.
5. Repeat step 2.
6. Connect the nominal voltages in all three phases and feed a current below the trip level in all three
phases.
7. Keep the current constant. Disconnect the voltage in all three phases simultaneously.
The BLKV, BLKZ and 3PH signals should not appear.
8. Change the magnitude of the voltage and current for phase 1 to a value higher than the set value
DVPU and DIPU.
9. Check that the pickup output signals PU_DV_A and PU_DI_A and the general pickup signals
PU_DV or PU_DI are activated.
10. Check that the pickup output signals for the current and voltage phases 2 and 3 are activated by
changing the magnitude of the voltage and current for phases 2 and 3.
Transformer protection RET670
Commissioning manual
,
I and I
A B C
The BLKV 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
VDLDPU of the dead line detection function.
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Testing functionality by secondary injection
are the measured phase currents
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1 and 2.
Section 11
M1405-96 v12
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