Completing The Test; Four Step Phase Overcurrent Protection 3-Phase Output Oc4Ptoc; Verifying The Settings - ABB rec670 Commissioning Manual

1MRK 511 360-UEN A
10.4.1.2
10.4.2
10.4.2.1
Bay control REC670 2.1 IEC
Commissioning manual
Testing functionality by secondary injection
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.
Check - no operation.

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.
Four step phase overcurrent protection 3-phase output
OC4PTOC
Prepare the IED for verification of settings outlined in section
verify settings".

Verifying the settings

Verification of the non-directional phase overcurrent function is done
as instructed below, 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 for operation is chosen: Connect the injection current to
phases L1 and neutral.
If 2 out of 3 currents for operation is chosen: Connect the injection current into
phase L1 and out from phase L2.
If 3 out of 3 currents for operation is chosen: Connect the symmetrical three-
phase injection current into phases L1, L2 and L3.
2. Connect the test set for the appropriate three-phase voltage injection to the IED
phases L1, L2 and L3. The protection shall be fed with a symmetrical three-
phase voltage.
3. Block higher set stages when testing lower set stages by following the procedure
described below:
3.1. Set the injected polarizing voltage slightly larger than the set minimum
polarizing voltage (default is 5% of UBase) and set the injection current to
lag the appropriate voltage by an angle of about 80° if forward directional
function is selected.
Section 10
"Preparing the IED to
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