Measuring The Operate Limit Of Set Values; Completing The Test; Four Step Residual Overcurrent Protection, (Zero Sequence Or Negative Sequence Directionality) Ef4Ptoc; Four Step Directional Earth Fault Protection - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
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.
11.4.3.1

Measuring the operate limit of set values

1. Inject a phase current into the IED with an initial value below the set value of
also 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. Switch the fault current off.
4. Compare the measured operating current with the set value.
11.4.3.2

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.
11.4.4 Four step residual overcurrent protection, (Zero sequence or
negative sequence directionality) EF4PTOC
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.
11.4.4.1

Four step directional earth fault protection

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
(5% of Ur) and set the injection current to lag the voltage by an angle equal to the set
reference characteristic angle (
If reverse directional function is selected, set the injection current to lag the polarizing
voltage by an angle equal to RCA+ 180°.
3. Increase the injected current and note the value at which the studied step of the function
operates.
4. Decrease the current slowly and note the reset value.
96
IN>> is in between IN>>Min and IN>>Max .
Do not exceed the maximum permitted overloading of the current circuits
in the IED.
AngleRCA ), if the forward directional function is selected.
© Copyright 2017 ABB. All rights reserved
1MRK 511 403-UEN E
IN>> and
TESTMODE setting to Off .
"Preparing the IED to verify
Bay control REC670
Commissioning manual
SEMOD52967-11 v9
SEMOD52967-24 v5
SEMOD53296-3 v9
SEMOD53296-208 v7