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1MRK 504 165-UEN Rev. K
11.6.3.3
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.6.4
Overexcitation protection OEXPVPH
Prepare the IED for verification of settings outlined in Section
11.6.4.1
Verifying the settings
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.
Wait until the thermal memory is emptied, set the cooling time constant according to the setting
plan and check another point on the inverse time curve injecting a voltage 1.3 · V/Hz>.
14.
Finally check that START and TRIP information is stored in the event menu.
11.6.4.2
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.6.5
Voltage differential protection VDCPTOV
Prepare the IED for verification of settings as outlined in section
"Preparing for test"
Transformer protection RET670
Commissioning manual
in this chapter.
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Testing functionality by secondary injection
"Preparing the IED to verify
"Requirements"
and section
Section 11
SEMOD54358-38 v4
M6583-45 v5
settings".
M6583-49 v4
M6583-85 v4
SEMOD175258-3 v2
197
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