U1> Set start voltage for step 1
8. Repeat the test for Step 2 of the function.
11.6.3.2 Completing the test
SEMOD54358-38 v4
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.
11.6.4 Overexcitation protection OEXPVPH
M6583-45 v5
Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
11.6.4.1 Verifying the settings
M6583-49 v4
1.
Enable function.
2. Connect a symmetrical three-phase voltage input from the test set to the
appropriate connection terminals of the overexcitation protection OEXPVPH
is configured for a three-phase voltage input.
A single-phase injection voltage is applied if the function is configured for a
phase-to-phase voltage input.
OEXPVPH is conveniently tested using rated frequency for the injection
voltage and increasing the injection voltage to get the desired overexcitation
level.
3. Connect the alarm contact to the timer and set the time delay tAlarm
temporarily to zero.
4. Increase the voltage and note the operate value V/Hz>.
5. Reduce the voltage slowly and note the reset value.
6. Set the alarm time delay to the correct value according to the setting plan and
check the time delay, injecting a voltage corresponding to 1.2 · V/Hz>.
7. Connect a trip output contact to the timer and temporarily set the time delay
tMin to 0.5s.
8. Increase the voltage and note the V/Hz>> operate value
9. Reduce the voltage slowly and note the reset value.
10. Set the time delay to the correct value according to the setting plan and check
the time delay tMin, injecting a voltage corresponding to 1.2 · V/Hz>>.
11. Check that trip and alarm contacts operate according to the configuration
logic.
12. Set the cooling time constant temporarily to min value (1min.) to quickly
lower the thermal content.
13. Wait for a period equal to 6 times Tcooling switch 20 minutes on a voltage
1.15 · V/Hz> and check the inverse operate time.
Section 11 1MRK 505 378-UEN A
Testing functionality by secondary injection
200 Line differential protection RED670 2.2 IEC
Commissioning manual
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