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11. Check that the protection does not operate when the polarizing voltage is zero.
12. Repeat the above described tests for the higher set steps.
13. Finally, check that start and trip information is stored in the event menu.
6.3.4.2
Four step non-directional residual overcurrent protection
1.
Do as described in
"Four step directional residual overcurrent protection"
,
but without applying any polarizing voltage.
6.3.4.3
Completing the test
Continue to test another function or end the testing by setting the parameter
TestMode
to
Off
under
Main menu/Tests/IED test mode/1:TESTMODE
. If
another function is tested, then set the parameter
Blocked
to
No
under
Main menu/
Tests/Function test modes/Current/EF4PTOC(51N67N,4IN>)/X:EF4PTOC
for the function, or for each individual function in a chain, to be tested next.
Remember to set the parameter
Blocked
to
Yes
, for each individual function that
has been tested.
6.3.5
Sensitive directional residual overcurrent and power
protection SDEPSDE
Prepare the IED for verification of settings as outlined in
Values of the logical signals for SDEPSDE are available on the local HMI under
Main menu/Tests/Function status/Current/SDEPSDE(67N,IN<->)/
1:SDEPSDE
. The Signal Monitoring in PCM600 shows the same signals that are
available on the local HMI.
shows the principal connection of the test set during the test of the
sensitive directional residual overcurrent protection. Observe that the polarizing
voltage is equal to -3U
0
.
6.3.5.1
Measuring the operate and time limit for set values
Operation mode 3I
0
· cosφ
Procedure
1.
Set the polarizing voltage to 1.2 ·
UNRel>
and the phase angle between
voltage and current to the set characteristic angle (
RCADir
), the current
lagging the voltage.
Take setting
RCAComp
into consideration if not equal to
0
.
2.
Measure that the operate current of the set directional element is equal to the
INcosPhi>
setting.
Section 6
1MRK 511 248-UEN -
Testing functionality
44
Commissioning Manual