13.11 Logic
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13.11.1 Tripping logic, common 3-phase output SMPPTRC (94)
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Prepare the IED for verification of settings outlined in Section "Preparing the IED to
verify 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.
13.11.1.1 3 phase operating mode
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1. Check that AutoLock and TripLockout are both set to Disabled.
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.
13.11.1.2 1p/3p operating mode
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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 TripLockout and AutoLock are both set to Disabled.
2. Initiate different single-phase-to-ground faults one at a time.
3. Initiate different phase-to-phase and three-phase faults.
Consider using an adequate time interval between faults, to overcome a reset
time, which is activated by SMBRREC (79). A three-pole trip should occur for
each separate fault and all of the trips. Functional outputs TRIP, all TR_A, TR_B,
TR_C and TR3P should be active at each fault.
Section 13 1MRK 502 073-UUS A
Testing functionality by secondary injection
270 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual
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