1. Connect the test set for three-phase voltage injection to the appropriate IED
terminals as shown in Figure 54
2. Increase the injected voltage and note the operated value (
start value) of the
studied step of the function.
3. Decrease the voltage slowly and note the reset value.
4. Connect a trip output contact to a timer.
5. Set the injected voltage to 110% of the operate level of the tested stage.
Switch on the current and check the time delay.
6. Check that all trip and start contacts operate according to the configuration
(signal matrices).
7. 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.
11.11.7.6 Zero sequence overvoltage protection LCZSPTOV
GUID-6289688A-6F66-4173-9F49-A67D3E311513 v1
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 voltage injection (L1, L2, L3) or residual
voltage injection (N) to the appropriate IED terminals. This depends on how
the IED is fed from the VT.
2. Increase the injected zero sequence voltage and note the operated value (start
value) of the studied step of the function.
3. Decrease the voltage slowly and note the reset value.
4. Connect a trip output contact to a timer.
5. Set the injected voltage to 110% of the operate level in the tested stage,
switch on the current and check the time delay.
6. Check that all trip and start contacts operate according to the configuration
(signal matrices).
7. 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.
11.11.7.7 Negative sequence overcurrent protection LCNSPTOC
GUID-46AA65BF-07F0-4E2B-B00F-D3B2057093DB v1
Prepare the IED for verification of settings as outlined in section
"Requirements"
and section "Preparing for test" in this chapter.
1MRK 505 378-UEN A Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 253
Commissioning manual
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