Hitachi RER670 Commissioning Manual page 124

Section 10
Testing functionality by secondary injection
10.8.2.2 Measuring the operate value for the dead line detection function
1. Apply two-phase voltages with their rated value and zero currents.
2. Decrease the measured voltage in both phases until the DLD2PH 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 percent of the base voltage UBase).
4. Apply two-phase currents with their rated value and zero voltages.
5. Decrease the measured current in both phases until the DLD2PH 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 percent of the base current IBase).
10.8.2.3 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 two-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 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.
3. Apply normal conditions as in step
The BLKU and BLKZ signals should reset, if activated, see step
4. Change the voltages and currents in all 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 and BLKZ signals should not appear.
5. Repeat step 2.
6. Connect the rated voltages in all phases and feed a current below the operate level in all
phases.
7. Keep the current constant. Disconnect the voltage in both two phases simultaneously.
The BLKU and BLKZ signals should not appear.
10.8.2.4 Completing the test
Continue to test another function or end the test by changing the TestMode setting to Off. Restore
connections and settings to their original values, if they were changed for testing purposes.
10.8.3 Voltage based delta supervision DELVSPVC
Prepare the IED for verification of settings outlined in Section
10.8.3.1 Function revision history
Document
revision
C
D
E
Table continues on next page
118
Product History
revision
2.2.2 -
2.2.3 The function's initial blocking of 11 cycles is removed. For the first time changed delta
from zero signal value to a value higher than the minimum level and if this change is
higher than delta level settings, then the function will release the start signal.
2.2.3 -
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1
"Preparing the IED to verify
1MRK 506 377-UEN Rev. L
GUID-0CF1BA07-57BF-410F-BE8F-C3CDA5635E36 v2
GUID-102B7334-0E33-45AE-A353-869ED527770A v2
1 and 2.
GUID-E265B56C-4064-40DD-A39C-26CBE54F6227 v1
GUID-FBFEC9C5-1B76-4688-A00D-9EEB33326966 v1
settings".
GUID-383C6822-E9FC-475E-82B3-0D4E247AEF72 v2
Railway application RER670
Commissioning manual