ABB Relion 670 Series Commissioning Manual page 166

Section 11
Testing functionality by secondary injection
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
1. Inject a phase current into the IED with an initial value below the set value of
make sure that the set value
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
4. Compare the measured operating current with the set value.
11.5.3.2 Completing the test
continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.5.4 Four step residual overcurrent protection, (Zero sequence or
negative sequence directionality) EF4PTOC (51N/67N)
Prepare the IED for verification of settings outlined in Section
settings".
Values of the logical signals for D2PTOC are available on the local HMI under Main menu/Tests/
Function status/Current protection/ResidualOverCurr4Step(51N_67N,4(IN>))/
EF4PTOC(51N_67N;4(IN>)):x, where x = instance number.
The Signal Monitoring in PCM600 shows the same signals that are available on the local HMI.
11.5.4.1 Four step directional ground fault protection
160
IN>> is in between IN>>Min and IN>>Max .
Do not exceed the maximum permitted overloading of the current circuits in
the IED.
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1MRK 506 371-UUS E
IN>> and also
TESTMODE setting to Disabled .
"Preparing the IED to verify
Line distance protection REL670
Commissioning manual
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