Verifying The Settings; Completing The Test; Four Step Residual Overcurrent Protection, (Zero Sequence Or Negative Sequence Directionality) Ef4Ptoc; Four Step Directional Earth Fault Protection - ABB REB670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.4.2.1
10.4.2.2
10.4.3
10.4.3.1
92

Verifying the settings

Procedure
1. Connect the test set for appropriate current injection to the appropriate IED
terminals.
If there is any configuration logic, which is used to enable or block any of 4
available overcurrent steps, make sure that step under test is enabled (that is,
end fault protection).
2. Increase the injected current and note the operated value of the studied step of
the function.
3. Decrease the current slowly and note the reset value.
4. Block higher set stages when testing lower set stages according to below.
5. Connect a trip output contact to a timer.
6. Set the injected current to 200% of the operate level of the tested stage,
switch on the current and check the time delay.
For inverse time curves, check the operate time at a current equal to 110% of
the operate current for tmin.
7. Check that all trip and start contacts operate according to the configuration
(signal matrixes)
8. Repeat the above described tests for the higher set stages.
9. Finally check that start and trip information is stored in the event menu.

Completing the test

Continue to test another function or end the test by changing the TESTMODE
setting to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
Four step residual overcurrent protection, (Zero sequence
or negative sequence directionality) EF4PTOC
Prepare the IED for verification of settings outlined in Section
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.

Four step directional earth fault protection

1MRK 505 372-UEN A
SEMOD128616-59 v3
SEMOD128616-83 v2
SEMOD53296-3 v9
"Preparing the IED
SEMOD53296-208 v7
Busbar protection REB670 2.2 IEC
Commissioning manual