ABB Relion 670 series - Completing the Test; Instantaneous Residual Overcurrent Protection EFPIOC (50 N); Measuring the Trip Limit of Set Values; Four Step Residual Overcurrent Protection, (Zero Sequence or Negative Sequence Directionality) EF4 PTOC (51 N;67 N)

10. If 2 out of 3 or 3 out of 3 currents are chosen for operation: Check that the function will not trip with
current in one phase only.
11. Repeat the above described tests for the higher set stages.
12. Check that pickup and trip information is stored in the event menu .
11.5.2.3 Completing the test
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Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.5.3 Instantaneous residual overcurrent protection EFPIOC (50N)
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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 /Tests /
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-ground 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 trip 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. Disable the fault current
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 Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.5.4 Four step residual overcurrent protection, (Zero sequence or
negative sequence directionality) EF4PTOC (51N/67N)
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Prepare the IED for verification of settings outlined in Section "Preparing the IED to verify settings".
Section 11 1MRK 504 165-UUS Rev. J
Testing functionality by secondary injection
170 Transformer protection RET670
Commissioning manual
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