Measuring The Operate Limit Of Set Values; Completing The Test; Four Step Residual Overcurrent Protection, (Zero Sequence Or Negative Sequence Directionality) Ef4Ptoc - ABB Relion 650 Series Commissioning Manual

Section 9
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-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.
9.5.3.1

Measuring the operate limit of set values

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.
4. Compare the measured operating current with the set value.
9.5.3.2

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.
9.5.4 Four step residual overcurrent protection, (Zero sequence or
negative sequence directionality) EF4PTOC
Prepare the IED for verification of settings outlined in Section
Values of the logical signals for D2PTOC are available on the local HMI under Main menu/Test/
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.
92
Do not exceed the maximum permitted overloading of the current circuits in the
IED.
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"Preparing the IED to verify
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