11.5.2.2 Completing the test
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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.
11.5.3 Instantaneous residual overcurrent protection EFPIOC
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Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
Values of the logical signals for EFPIOC are available on the local HMI under
Main menu/T
ests/Function status/Current protection/
InstResidualOverCurrent(50N,IN>>)/EFPIOC(50N;IN>>):x, where x = 1, 2,
and 3.
The Signal Monitoring in PCM600 shows the same signals that are available on the
local HMI.
To verify the settings the following fault type should be tested:
• Phase-to-earth fault
Ensure that the maximum continuous current, supplied from the current source
used for the test of the IED, does not exceed four times the rated current value of
the IED.
11.5.3.1 Measuring the operate limit of set values
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1. Inject a phase current into the IED with an initial value below the set value of
IN>> and also make sure that the set value IN>> is in between IN>>Min and
IN>>Max.
2. Increase the injected current in the Ln or in the neutral (summated current
input) phase until the TRIP signal appears.
3. Switch the fault current off.
Do not exceed the maximum permitted overloading of the
current circuits in the IED.
4. Compare the measured operating current with the set value.
11.5.3.2 Completing the test
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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.
Section 11 1MRK 505 378-UEN A
Testing functionality by secondary injection
174 Line differential protection RED670 2.2 IEC
Commissioning manual
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