1. Check that AutoLock and TripLockout are both set to Disabled.
2. Initiate a three-phase fault
The functional output TRIP should be active at each fault. The output CLLKOUT
must not be set.
3. Activate the automatic lockout function, set AutoLock = Enabled and repeat.
4. Reset the lockout signal by shortly thereafter activating the reset lockout
(RSTLKOUT) signal.
5. Activate the TRIP signal lockout function, set TripLockout = Enabled and repeat.
The output TRIP must be active and stay active after each fault, CLLKOUT must be
set.
6. Reset the lockout.
All functional outputs should reset.
7. Deactivate the TRIP signal lockout function, set TripLockout = Disabled and the
automatic lockout function, set AutoLock = Disabled if not used.
6.8.2.3 Completing the test
Continue to test another function or end the testing by setting the parameter TestMode to
Disabled under Main menu/Tests/IED test mode/TESTMODE:1. If another function is
tested, then set the parameter Blocked to No under Main menu/Tests/Function test
modes/Logic/SPTPTRC(94,1->0)/SPTPTRC:1 for the function, or for each individual
function in a chain, to be tested next. Remember to set the parameter Blocked to Yes, for
each individual function that has been tested.
6.9 Testing monitoring functions
6.9.1 Event counter CNTGGIO
The event counter function CNTGGIO can be tested by connecting a binary input to the
counter under test and applying pulses to the counter. The speed of pulses must not exceed
10 per second. Normally the counter will be tested in connection with tests on the function
that the counter is connected to, such as trip logic. When configured, test it together with
the function that operates it. Trig the function and check that the counter result
corresponds with the number of operations.
6.9.2 Limit counter L4UFCNT
The Limit counter function L4UFCNT can be tested by connecting a binary input to the
counter and applying pulses to the counter. The speed of the pulses must not exceed the
cycle time of the function. Normally the counter will be tested when testing the function
that the counter is connected to, such as the trip function. When the function is configured,
1MRK 505 293-UUS A Section 6
Testing functionality
115
Commissioning manual
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