ABB RELION REC650, Commissioning Manual

Page: 82 / 130

9.4.2.4 Measuring the operate value for the dead line detection function
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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 UDLD< (UDLD< is in percentage
of the base voltage
UBase ).
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 IDLD< (IDLD< is in percentage of
the base current
IBase ).
9.4.2.5 Checking the operation of the du/dt and di/dt based function
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Check the operation of the du/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
DU> and the current
change must be lower than the set value 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< of the dead line detection function.
3. Apply normal conditions as in step 1 .
The BLKU, BLKZ and 3PH signals should reset, if activated, see step 1 and
2 .
4. Change the voltages and currents in all three phases simultaneously.
The voltage change must be higher than the set value
DU> and the current
change must be higher than the set value DI< .
The BLKU, 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
operate level in all three phases.
7. Keep the current constant. Disconnect the voltage in all three phases
simultaneously.
The BLKU, BLKZ and 3PH signals should not appear.
Section 9
1MRK 511 425-UEN A
Testing functionality by secondary injection
76 Bay control REC650 2.2 IEC
Commissioning manual