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

1MRK 504 165-UEN E
11.9.2.4

Measuring the operate 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 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 ).
11.9.2.5

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.
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
be lower than the set value
•
•
3. Apply normal conditions as in step 1.
The BLKU, 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
be higher than the set value
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.
8. Change the magnitude of the voltage and current for phase 1 to a value higher than the
set value
9. Check that the start output signals STDUL1 and STDIL1 and the general start signals
STDU or STDI are activated.
10. Check that the start 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.
11.9.2.6

Completing the test

continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
Transformer protection RET670
Commissioning manual
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.
DI< .
DU> and DI< .
© Copyright 2017 ABB. All rights reserved
Testing functionality by secondary injection
GUID-4ABF1FD4-F6D3-4109-AFE5-552875E558A0 v4
DU> and the current change must
1 and 2.
DU> and the current change must
TESTMODE setting to Off .
Section 11
M1405-96 v12
M1405-130 v5
207