Completing The Test; Thermal Overload Protection, Two Time Constants Trpttr (49); Checking Trip And Reset Values - ABB Relion 670 Series Commissioning Manual

1MRK 511 403-UUS Rev. K
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 LFPTTR/LCPTTR (26)protection 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, PICKUP and TRIP should disappear.
8. Reset the BLOCK binary input.
9. Check the reset limit (TdReset).
Monitor the signal PICKUP 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 Disabled.
11.4.7.2

Completing the test

Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.4.8

Thermal overload protection, two time constants TRPTTR (49)

Prepare the IED for verification of settings as outlined in section
for test" in this chapter.
11.4.8.1

Checking trip and reset values

1. Connect symmetrical three-phase currents to the appropriate current terminals of the IED.
2. Set the Time constant 1 (Tau1) and Time Constant 2 (Tau2) temporarily to 1 minute.
3. Set the three-phase injection currents slightly lower than the set trip value of stage IBase1,
increase the current in phase A until stage IBase1 trips and note the trip value.
4. Decrease the current slowly and note the reset value.
Check, in the same way, the trip and reset values of IBase1 for phases B and C.
5. Activate the cooling input signal, thus switching to base current IBase2.
6. Check the trip and reset values (for all three phases) for IBase2 in the same way as described
above for stage IBase1.
7. Deactivate the input signal for stage IBase2.
8. Set the time constant for IBase1 in accordance with the setting plan.
9. Set the injection current for phase A to 1.50 · IBase1.
10. Connect a trip output contact to the timer and monitor the output of contacts ALARM1 and ALARM2
to digital inputs in test equipment.
Read the heat content in the thermal protection from the local HMI and wait until the content is
zero.
Bay control REC670
Commissioning manual
Observe the maximum permitted overloading of the current circuits in the IED.
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Testing functionality by secondary injection
"Requirements" and section
Section 11
M14950-48 v5
SEMOD53632-3 v5
"Preparing
SEMOD53632-11 v7
103