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

Section 11
Testing functionality by secondary injection
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
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 .
11.4.7.2

Completing the test

continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.4.8

Thermal overload protection, two time constants TRPTTR

Prepare the IED for verification of settings as outlined in section
section
11.4.8.1

Checking operate and reset values

1. Connect symmetrical three-phase currents to the appropriate current terminals of the
IED.
2. Set the Time constant 1 (
3. Set the three-phase injection currents slightly lower than the set operate value of stage
IBase1 , increase the current in phase L1 until stage IBase1 operates and note the operate
value.
4. Decrease the current slowly and note the reset value.
Check, in the same way, the operate and reset values of
5. Activate the cooling input signal, thus switching to base current
6. Check the operate and reset values (for all three phases) for
described above for stage
7. Deactivate the input signal for stage
8. Set the time constant for
9. Set the injection current for phase L1 to 1.50 ·
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.
11. Switch on the injection current and check that ALARM1 and ALARM2 contacts operate at
the set percentage level and that the operate time for tripping is in accordance with the
set Time Constant 1 (
With setting Itr = 101%
content in the memory shall be 0.60 · Time Constant 1 (
12. Check that all trip and alarm contacts operate according to the configuration logic.
13. Switch off the injection current and check from the service menu readings of thermal
status and LOCKOUT that the lockout resets at the set percentage of heat content.
14. Activate the cooling input signal to switch over to base current
104
"Preparing for test" in this chapter.
Tau1 ) and Time Constant 2 ( Tau2 ) temporarily to 1 minute.
Observe the maximum permitted overloading of the current circuits in the
IED.
IBase1 in accordance with the setting plan.
Tau1 ).
IBase1 and injection current 1.50 · IBase1 , the trip time from zero
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IBase1 .
IBase2 .
IBase1 .
1MRK 511 403-UEN E
ReclTemp .
TESTMODE setting to Off .
"Requirements" and
IBase1 for phases L2 and L3.
IBase2 .
IBase2 in the same way as
Tau1 ).
IBase2 .
Bay control REC670
Commissioning manual
M14950-48 v5
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