ABB Relion 670 Series Commissioning Manual page 244

Section 11
Testing functionality by secondary injection
1. Connect the test set for three-phase current injection to the appropriate IED terminals.
2. Inject a symmetrical three-phase current larger than the set value I<.
3. Decrease the injected current in phase A and note the operated value (pickup value) of the
studied step of the function.
4. Increase the current slowly and note the reset value.
5. Connect a trip output contact to a timer.
6. Decrease the injected current step-wise to 50% of the operate level and check the time delay.
7. Check that all trip and pickup contacts operate according to the configuration (signal
matrices).
8. Finally check that pickup and trip information is stored in the event memory.
9. Repeat steps 2 – 7 for phases B and C.
Completing the test
continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.12 Logic
11.12.1 Tripping logic, common 3-phase output SMPPTRC (94)
Prepare the IED for verification of settings outlined in Section
settings".
This function is functionality tested together with other protection functions (line differential
protection, ground-fault overcurrent protection, and so on) within the IED. It is recommended that
the function is tested together with the autorecloser function, when built into the IED or when a
separate external unit is used for reclosing purposes.
11.12.1.1 3 phase operating mode
1. Check that
2. Initiate a three-phase fault.
An adequate time interval between the faults should be considered, to overcome a reset time
caused by the possible activation of the autorecloser function SMBRREC (79). The function
must issue a three-pole trip in all cases when trip is initiated by any protection or some other
built-in or external function. The following functional output signals must always appear
simultaneously: TRIP, TR_A, TR_B, TR_C and TR3P.
11.12.1.2 1p/3p operating mode
In addition to various other tests, the following tests should be performed. They depend on the
complete configuration of an IED:
Procedure
1. Make sure that
2. Initiate different single-phase-to-ground faults one at a time.
3. Initiate different phase-to-phase and three-phase faults.
238
AutoLock and TripLockout are both set to Disabled .
TripLockout and AutoLock are both set to Disabled .
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1MRK 506 371-UUS E
TESTMODE setting to Disabled .
"Preparing the IED to verify
Line distance protection REL670
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