ABB REG670 - Completing the Test; Four Step Residual Overcurrent Protection, (Zero Sequence or Negative Sequence Directionality) EF4 PTOC (51 N;67 N); Four Step Directional Ground Fault Protection

Do not exceed the maximum permitted overloading of the current
circuits in the IED.
4. Compare the measured operating current with the set value.
13.5.3.2 Completing the test
SEMOD52967-24 v5
Continue to test another function or end the test by changing the TESTMODE setting to
Disabled. Restore connections and settings to their original values, if they were
changed for testing purposes.
13.5.4 Four step residual overcurrent protection, (Zero sequence or
negative sequence directionality) EF4PTOC (51N/67N)
SEMOD53296-3 v9
Prepare the IED for verification of settings outlined in Section "Preparing the IED to
verify 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.
13.5.4.1 Four step directional ground fault protection
SEMOD53296-208 v7
1. Connect the test set for single current injection to the appropriate IED terminals.
Connect the injection current to terminals A and neutral.
2. Set the injected polarizing voltage slightly larger than the set minimum polarizing
voltage (5% of Vn) and set the injection current to lag the voltage by an angle
equal to the set reference characteristic angle (AngleRCA), if the forward
directional function is selected.
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 trips.
4. Decrease the current slowly and note the reset value.
5. If the test has been performed by injection of current in phase A, repeat the test,
injecting current into terminals B and C with a polarizing voltage connected to
terminals B, respectively C.
1MRK 502 073-UUS A Section 13
Testing functionality by secondary injection
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 191
Commissioning manual