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1MRK 505 378-UEN Rev. K
11.11.7.10
Three phase undercurrent LCP3PTUC
Prepare the IED for verification of settings as outlined in section
"Preparing for test"
1.
Connect the test set for three-phase current injection to the appropriate IED terminals.
2.
Inject a symmetrical three-phase current larger than the set value I<.
3.
Decrease the injected current in phase L1 and note the operated value (start value) of the
studied step of the function.
4.
Increase the current slowly and note the reset value.
5.
Connect a trip output contact to a timer.
6.
Decrease the injected current step-wise to 50% of the operate level and check the time delay.
7.
Check that all trip and start contacts operate according to the configuration (signal matrices).
8.
Finally check that start and trip information is stored in the event memory.
9.
Repeat steps 2 – 7 for phases L2 and L3.
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.12
Logic
11.12.1
Tripping logic, common 3-phase output SMPPTRC
Prepare the IED for verification of settings outlined in Section
This function is functionality tested together with other protection functions (line differential protection,
earth-fault overcurrent protection, and so on) within the IED. It is recommended that the function is
tested together with the autorecloser function, when built into the IED or when a separate external
unit is used for reclosing purposes.
11.12.1.1
Function revision history
Document
revision
A
B
C
D
E
F
G
H
11.12.1.2
3 phase operating mode
1.
Check that AutoLock and TripLockout are both set to Off .
2.
Initiate a three-phase fault.
Line differential protection RED670
Commissioning manual
in this chapter.
Product
History
revision
2.2.1
STN (Start neutral) output added. IEC 61850 mapping is made for the added output.
2.2.1
-
2.2.2
-
2.2.3
-
2.2.3
-
2.2.4
-
2.2.4
Added TRINN (Trip neutral) input and TRN (trip neutral) outputs. TRINALL (Trip all
phases) input is changed from TRIN. IEC 61850 mapping is made for the added output.
The block logic is corrected for the lockout functionality.
2.2.5
-
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Testing functionality by secondary injection
GUID-8C3BA5FB-5878-4B87-BDF0-5DCDF72870B4 v1
"Requirements"
and section
"Preparing the IED to verify
GUID-ADA72CE6-B6ED-48B3-A897-A7B42ECDEBB4 v2
Section 11
SEMOD53577-1 v1
SEMOD54375-102 v10
settings".
SEMOD54375-106 v10
233
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