10.10.4.2
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.
10.10.5
Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH
Prepare the IED for verification of settings as outlined in the section
""
.
Values 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.
10.10.5.1
Testing the current reversal logic
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
.
4.
Abruptly reverse the current to
AngleRCA
setting lagging the voltage, to operate
the forward directional element.
5.
Check that the IRVL output still is activated after the reversal with a time delay
that complies with the setting
tDelayRev
.
6.
Switch off the polarizing voltage and the current.
10.10.5.2
Testing the weak-end infeed logic
If setting
WEI = Echo
1.
Inject the polarizing voltage 3U0 to (180° —
AngleRCA
) 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 setting
operating current (
IN>Dir
).
3.
Activate the CRL binary input.
Section 10
1MRK 511 360-UEN A
Testing functionality by secondary injection
174
Bay control REC670 2.1 IEC
Commissioning manual
