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1MRK 504 165-UEN Rev. K
1.
Confirm that OperationPAR is set to MF for each transformer in the parallel group.
2.
Review the setting for VTmismatch and tVTmismatch.
3.
Inject a voltage U
(VTmismatch · USet)) for Transformer 2.
4.
This condition should result in a VTmismatch which will mutually block the operation of the
automatic voltage control for tap changer, parallel control function TR8ATCC for all
transformers connected in the parallel group, which can be confirmed through interrogation of
the local HMI.
5.
Confirm that the automatic voltage control for tap changer, parallel control function TR8ATCC
responds in accordance with the setting for CircCurrBk.
11.11.5.9
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.
11.11.6
Single command, 16 signals SINGLECMD
For the single command function block, it is necessary to configure the output signal to
corresponding binary output of the IED. The operation of the single command function
(SINGLECMD) is then checked from the local HMI by applying the commands with Mode = Off,
Steady or Pulse, and by observing the logic statuses of the corresponding binary output. Command
control functions included in the operation of different built-in functions must be tested at the same
time as their corresponding functions.
11.11.7
Interlocking
Prepare the IED for verification of settings as outlined in section
section
Values of the logical signals are available on the local HMI under Main menu /Tests /Function
status /Control /Apparatus control /Interlocking . The Signal Monitoring in PCM600 shows the
same signals that are available on the local HMI.
The interlocking function consists of a bay-level part and a station-level part. The interlocking is
delivery specific and is realized by bay-to-bay communication over the station bus. For that reason,
test the function in a system, that is, either in a complete delivery system as an acceptance test (FAT/
SAT) or as parts of that system.
11.12
Scheme communication
11.12.1
Scheme communication logic for distance or overcurrent
protection ZCPSCH
Prepare the IED for verification of settings as outlined in section
section
Check the scheme logic during the secondary injection test of the impedance or overcurrent
protection functions.
Activation of the different zones verifies that the CS signal is issued from the intended zones. The CS
signal from the independent tripping zone must have a tSendMin minimum time.
Transformer protection RET670
Commissioning manual
equal to USet for Transformer 1 and a voltage less than (USet –
B
"Preparing for test"
in this chapter.
"Preparing for test"
in this chapter.
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Testing functionality by secondary injection
"Requirements"
and
"Requirements"
and
Section 11
SEMOD175185-374 v4
SEMOD172444-5 v3
M11755-2 v9
SEMOD53569-1 v1
M13868-2 v7
249
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