Values of the logical signals for LOVPTUV (27) are available on the local HMI under
Main menu/Tests/Function status/Voltage/LOVPTUV(27,U<)/LOVPTUV:1. The
Signal Monitoring in PCM600 shows the same signals that are available on the local HMI.
6.4.4.1 Measuring the operate limit of set values
1. Check that the input logical signals BLOCK, CBOPEN and BLKU are logical zero.
2. Supply a three-phase rated voltage in all three phases and note on the local HMI that
the TRIP logical signal is equal to the logical 0.
3. Switch off the voltage in all three phases.
After set tTrip time a TRIP signal appears on the corresponding binary output or on
the local HMI.
Note that TRIP at this time is a pulse signal, duration should be
according to set tPulse.
4. Inject the measured voltages at rated values for at least set tRestore time.
5. Activate the CBOPEN binary input.
6. Simultaneously disconnect all the three-phase voltages from the IED.
No TRIP signal should appear.
7. Inject the measured voltages at rated values for at least set tRestore time.
8. Activate the BLKU binary input.
9. Simultaneously disconnect all the three-phase voltages from the IED.
No TRIP signal should appear.
10. Reset the BLKU binary input.
11. Inject the measured voltages at rated values for at least set tRestore time.
12. Activate the BLOCK binary input.
13. Simultaneously disconnect all the three-phase voltages from the IED.
No TRIP signal should appear.
14. Reset the BLOCK binary input.
6.4.4.2 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/Voltage/LOVPTUV(27,U<)/LOVPTUV: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.
Section 6 1MRK 505 293-UUS A
Testing functionality
80
Commissioning manual
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