11.4.16 Completing the test
GUID-8BD66BC8-AAC3-41C4-B819-B159361688D2 v4
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.
11.5 Current protection
SEMOD53531-1 v1
11.5.1 Instantaneous phase overcurrent protection 3-phase output
PHPIOC
M11754-3 v8
Prepare the IED for verification of settings outlined in Section "Preparing the IED
to verify settings".
Values of the logical signals for PHPIOC are available on the local HMI under
Main menu/T
ests/Function status/Current protection/
InstPhaseOverCurrent(50,3I>>)/PHPIOC(50;3I>>):x, where x = 1, 2, and 3.
The Signal Monitoring in PCM600 shows the same signals that are available on the
local HMI.
To verify the settings the following fault type should be tested:
• Phase-to-earth fault
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 operate 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 TRLn (n=1–3) signal
appears.
4. Switch the fault current off.
1MRK 505 378-UEN A Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 171
Commissioning manual
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