10.5.5.2 Completing the test
SEMOD175060-148 v4
continue to test another function or end the test by changing the TESTMODE
setting to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
10.5.6 Thermal overload protection, one time constant, Celsius
LPTTR
GUID-3BCDAD80-BBFE-4D98-97B1-8EF11B109304 v1
Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
Check that the input logical signal BLOCK is logical zero and that on the local
HMI, the logical signal TRIP, START and ALARM are equal to logical zero.
10.5.6.1 Measuring the operate and time limit of set values
M14950-8 v3
Testing the protection without external temperature compensation
(NonComp)
M14950-10 v10
1. Reset the thermal memory on the local HMI under Main menu/Reset/Reset
temperature/ThermalOverload1TimeConst(PTTR,26)/LPTTR:x,
2. Switch the fault current on and take note of the temperature, available on the
local HMI under Main menu/Test/Function status/Current protection/
ThermOverLoad1TimeConst(PTTR,26)/LPTTR:x/TEMP
3. Check the time until the actual temperature TEMP has reached the
AlarmTemp level during injection.
Monitor the signal ALARM until it appears on the corresponding binary
output or on the local HMI.
4. Measure the LPTTR protection trip time.
Use the TRIP signal from the configured binary output to stop the timer.
5. Take the TEMP readings.
Compare with the setting of TripTemp.
6. Activate the BLOCK binary input.
The signals ALARM, START and TRIP should disappear.
7. Reset the BLOCK binary input.
8. Check the reset limit (TdReset).
Monitor the signal START until it disappears on the corresponding binary
output or on the local HMI, take the TEMP readings and compare with the
setting of ReclTemp.
9. Compare the measured trip time with the setting according to the formula.
10. Reset the thermal memory.
11. Continue to test another function or end the test by changing the test mode
setting to Off.
Section 10 1MRK 506 377-UEN C
Testing functionality by secondary injection
114 Railway application RER670 2.2 IEC
Commissioning manual
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