Thermal Overload Protection, One Time Constant, Celsius/Fahrenheit Lcpttr/Lfpttr; Measuring The Operate And Time Limit Of Set Values; Completing The Test; Breaker Failure Protection, Phase Segregated Activation And Output Ccrbrf - ABB Relion 650 Series Commissioning Manual

Section 9
Testing functionality by secondary injection
9.5.5 Thermal overload protection, one time constant, Celsius/
Fahrenheit LCPTTR/LFPTTR
Prepare the IED for verification of settings as outlined in section
section
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.
9.5.5.1

Measuring the operate and time limit of set values

Testing the protection without external temperature compensation (NonComp)
1. Quickly set the measured current (fault current) in one phase to about 300% of IRef (to
minimise the trip time), and switch the current off.
2. Reset the thermal memory on the local HMI under Main menu /Reset /Reset temperature /
ThermalOverload1TimeConst(PTTR,26) /LFPTTR:x , Main menu /Reset /Reset
temperature /ThermalOverload1TimeConst(PTTR,26) /LCPTTR:x ,
3. 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) /LFPTTR:x /TEMP , Main menu /Test /Function
status /Current protection /ThermOverLoad1TimeConst(PTTR,26) /LCPTTR:x /TEMP ,
4. 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.
5. Measure the LCPTTR/LFPTTRprotection trip time.
Use the TRIP signal from the configured binary output to stop the timer.
6. Take the TEMP readings.
Compare with the setting of TripTemp.
7. Activate the BLOCK binary input.
The signals ALARM, START and TRIP should disappear.
8. Reset the BLOCK binary input.
9. 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.
10. Compare the measured trip time with the setting according to the formula.
11. Reset the thermal memory.
12. Continue to test another function or end the test by changing the test mode setting to Off.
9.5.5.2

Completing the test

Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
9.5.6 Breaker failure protection, phase segregated activation and
output CCRBRF
Prepare the IED for verification of settings outlined in Section
The Breaker failure protection, 3-phase activation and output function CCRBRF should normally be
tested in conjunction with some other function that provides a start signal. An external START signal
can also be used.
94
"Preparing for test" in this chapter.
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"Requirements" and
"Preparing the IED to verify
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