Use the TRIP signal from the configured binary output to stop the timer.
7. Compare the measured time with the setting for tCoor
d.
8. Activate the BLOCK digital input.
9. Switch the fault current on (110% of the set operating current) and wait for a
period longer than the set value tCoord.
No TRIP signal should appear.
10. Switch the fault current and the polarizing voltage off.
1
1.
Reset the CR binary input and the BLOCK digital input.
11.11.5.2 Completing the test
M13926-71 v5
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.
11.11.6 Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH
M13936-2 v8
Prepare the IED for verification of settings as outlined in section
"Requirements"
and section "Preparing for test" in this chapter.
V
alues of the logical signals for ECRWPSCH are available on the Local HMI
under Main menu/Tests/Function status/Scheme communication/ECRWPSCH(85)/
ECRWPSCH:1.
The Signal Monitoring in PCM600 shows service values that are available on the
Local HMI as well.
First, test the four step residual overcurrent protection function EF4PTOC and then
the current reversal and weak-end infeed logic according to the corresponding
instructions. Then continue with the instructions below.
11.11.6.1 Testing the current reversal logic
M13936-9 v7
1. Inject the polarizing voltage 3U0 to 5% of UBase and the phase angle
between voltage and current to 155°, the current leads the voltage.
2. Inject current (180° — AngleRCA) in one phase to about 110% of the set
operating current of the four step residual overcurrent protection (IN>Dir).
3. Check that the IRVL output is activated in the disturbance recorder after the
set time tPickUpRev.
1MRK 505 378-UEN A Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 245
Commissioning manual
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