Ensure that the maximum continuous current, supplied from the current source used for the test of the
IED, does not exceed four times the rated current value of the IED.
11.5.1.1 Measuring the trip limit of set values
M11754-11 v7
1. Set the operation mode to 1 out of 3.
2. Inject a phase current into the IED with an initial value below the set value of IP>> and also make
sure that the set value IP>> is in between IP>>Min and IP>>Max.
3. Increase the injected current in the Ln phase until the TR_A (TR_B or TR_C) signal appears.
4. Switch the fault current off.
Observe: Do not exceed the maximum permitted overloading of the current circuits
in the IED.
5. Compare the measured operating current with the set value.
6. Set the operation mode to 2 out of 3 and inject current into one of the phases and then check that
no TRLn signal appears.
11.5.1.2 Completing the test
M11754-24 v5
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.5.2 Directional phase overcurrent protection, four steps OC4PTOC
(51_67)
SEMOD56287-67 v9
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings".
Values of the logical signals for OC4PTOC are available on the local HMI under Main menu/Tests/
Function status/Current protection/PhaseOverCurrent4Step(51_67,4(3I>)) /
OC4PTOC(51_67;4(3I>)):x, where x = instance number.
The Signal Monitoring in PCM600 shows the same signals that are available on the local HMI.
11.5.2.1 Function revision history
GUID-154CAE8E-8FD4-460C-852D-6E5C93545F0D v1
Document
revision
Product
revision
History
A 2.2.1 -
B 2.2.1 -
C 2.2.2 -
D 2.2.3 -
E 2.2.3 -
F 2.2.4 -
Table continues on next page
Section 11 1MRK 504 165-UUS Rev. J
Testing functionality by secondary injection
168 Transformer protection RET670
Commissioning manual
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