ABB Relion 670 Series Commissioning Manual page 208

Section 11
Testing functionality by secondary injection
Where:
I
ANSIEQUATION00020 V1 EN-US
7. Compare the result with the set value of the zero-sequence trip current. Consider that the set
value
11.9.2.4 Measuring the
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 ).
11.9.2.5 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
lower than the set value
•
•
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
higher than the set value
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.
202
,
I and I
A B C
3I0< is in percentage of the base current IBase .
trip value for the dead line detection function
DIPU .
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.
DIPU .
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are the measured phase currents
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DVPU and the current change must be
1 and 2.
DVPU and the current change must be
Line distance protection REL670
1MRK 506 371-UUS E
M1405-96 v12
Commissioning manual