6.5.4.1
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.
6.5.4.2
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/1:TESTMODE
. If another
function is tested, then set the parameter
Blocked
to
No
under
Main menu/Tests/
Function test modes/Voltage/LOVPTUV(27,U<)/1:LOVPTUV
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 506 331-UUS A
Testing functionality
94
Commissioning Manual
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