10.5.3 Instantaneous residual overcurrent protection EFRWPIOC
GUID-419ED874-6302-401C-B5CF-4D413963664D v1
Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
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.
10.5.3.1 Measuring the operate limit of set values
SEMOD52967-11 v9
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 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 IN>>
10.5.3.2 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.
10.5.4 Two step residual overcurrent protection EF2PTOC
GUID-B4C584F3-485B-4B33-9E30-D6BEA8D3AE3E v2
Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
10.5.4.1 Directional Stage
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1. Connect the test set for single current injection to the appropriate IED
terminals.
Connect the injection current to terminals L1 and neutral.
2. Set the injected polarizing voltage slightly larger than the set minimum
polarizing voltage (default 2% of Ur) and set the injection current to lag the
1MRK 506 377-UEN C Section 10
Testing functionality by secondary injection
Railway application RER670 2.2 IEC 107
Commissioning manual
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