ABB RED670 - Direct Transfer Trip Logic; Compensated Over- and Undervoltage Protection COUVGAPC; Low Active Power and Power Factor Local Criteria LAPPGAPC

11.11.7 Direct transfer trip logic
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11.11.7.1
Low active power and power factor local criteria LAPPGAPC
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Prepare the IED for verification of settings as outlined in section "Requirements"
and section "Preparing for test" in this chapter.
1.
Connect the test set for three-phase current injection and three-phase voltage
to the appropriate IED terminals.
2. Inject symmetrical phase voltages equal to the rated voltage.
3. Decrease the injected current in phase L1 and note the operated value (start
value) of the studied step of the function. This current shall have the same
phase angle as the injected phase voltage. The active power for operation is
calculated as:
ph ph
P U I= ×
(single-phase active power).
4. Increase the current slowly and note the reset value.
5.
Connect a trip output contact to a timer.
6. Set the injected current to 50% of the operate level in the tested stage. Switch
on the current and check the time delay.
7. Check that all trip and start contacts operate according to the configuration
(signal matrices).
8. Finally check that start and trip information is stored in the event memory.
Repeat steps 3 – 6 for phases L2 and L3.
9. Inject symmetrical phase voltages and phase currents in all three phases,
equal to SBase (rated voltage and current).
10. Increase the phase angle between the injected phase voltages and phase
current, and note the operate value φ. The corresponding power factor is
equal to
cospf
j =
.
11.
Decrease the phase angle and note the reset value.
12. Set the phase angle of the injected current slightly higher than the operate
value. Switch on the current and check the time delay.
13. Check that all trip and start contacts operate according to the configuration
(signal matrices).
14. Finally check that start and trip information is stored in the event memory.
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.
11.11.7.2 Compensated over- and undervoltage protection COUVGAPC
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Prepare the IED for verification of settings as outlined in section
"Requirements"
and section "Preparing for test" in this chapter.
Section 11 1MRK 505 378-UEN A
Testing functionality by secondary injection
248 Line differential protection RED670 2.2 IEC
Commissioning manual