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

1MRK 505 339-UEN B
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
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.
10.3.2.2

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.
10.3.3 Four step residual overcurrent protection, (Zero sequence or
negative sequence directionality) EF4PTOC
Prepare the IED for verification of settings as outlined in the section
this chapter.
10.3.3.1

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
(default 5% of Ur) and set the injection current to lag the voltage by an angle equal to the
set reference characteristic angle (
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
operates.
4. Decrease the current slowly and note the reset value.
5. If the test has been performed by injection of current in phase L1, repeat the test,
injecting current into terminals L2 and L3 with a polarizing voltage connected to
terminals L2, respectively L3.
6. Block lower set steps when testing higher set steps according to the instructions that
follow.
7. Connect a trip output contact to a timer.
8. Set the injected current to 200% of the operate level of the tested step, 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
9. Check that all operate and start contacts operate according to the configuration (signal
matrixes)
Commissioning manual
tmin .
txMin .
Testing functionality by secondary injection
AngleRCA ), if the forward directional function is
Section 10
SEMOD128616-83 v2
TestMode setting to Off .
SEMOD53296-3 v8
"Preparing for test" in
SEMOD53296-208 v6
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