Completing The Test; Instantaneous Residual Overcurrent Protection Efpioc - ABB RET670 Commissioning Manual

Section 11
Testing functionality by secondary injection
11.5.2.2
11.5.3
174
If reverse directional function is selected, set the injection current to lag
the polarizing voltage by an angle equal to 260° (equal to 80° + 180°).
3.2. Increase the injected current, note the operate value of the tested step of
the function and compare it to the set value.
3.3. Decrease the current slowly, note the reset value and compare it to the
reset ratio 95%.
4. If the test has been performed by injection of current in phase L1, repeat the
test, injecting current into phases L2 and L3 with polarizing voltage
connected to phases L2, respectively L3 (1 out of 3 currents for operation).
5. If the test has been performed by injection of current in phases L1 – L2,
repeat the test, injecting current into phases L2 – L3 and L3 – L1 with the
appropriate phase angle of injected currents.
6. Connect a trip output contact to a timer.
7. 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 txMin.
8. Check that all operate and start contacts operate according to the
configuration (signal matrixes).
9. Reverse the direction of the injected current and check that the protection
does not operate.
10. If 2 out of 3 or 3 out of 3 currents are chosen for operation: Check that the
function will not operate with current in one phase only.
11. Repeat the above described tests for the higher set stages.
12. 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.

Instantaneous residual overcurrent protection EFPIOC

Prepare the IED for verification of settings outlined in Section
to verify settings".
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
1MRK 504 165-UEN A
SEMOD56287-118 v4
"Preparing the IED
Transformer protection RET670 2.2 IEC
Commissioning manual
SEMOD52967-3 v7