Completing The Test; Directional Phase Overcurrent Protection, Four Steps Oc4Ptoc; Verifying The Settings - ABB RED670 Commissioning Manual

Section 11
Testing functionality by secondary injection
11.5.1.2
11.5.2
11.5.2.1
172
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.

Completing the test

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.
Directional phase overcurrent protection, four steps
OC4PTOC
Prepare the IED for verification of settings outlined in Section
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.

Verifying the settings

The verification of the non-directional phase overcurrent function is
done as instructed below, but without applying any polarizing
voltage.
1. Connect the test set for current injection to the appropriate IED phases.
If there is any configuration logic that is used to enable or block any of the
four available overcurrent steps, make sure that the step under test is enabled
(for example, end fault protection).
If 1 out of 3 currents are chosen for operation: Connect the injection current
to phases L1 and neutral.
If 2 out of 3 currents are chosen for operation: Connect the injection current
into phase L1 and out from phase L2.
1MRK 505 378-UEN A
"Preparing the IED
Line differential protection RED670 2.2 IEC
Commissioning manual
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