Thermal Overload Protection, Two Time Constants Trpttr (49); Checking Operate And Reset Values - ABB Relion 650 Series Commissioning Manual

1MRK 505 289-UUS B
be tested next. Remember to set the parameter
has been tested.
7.4.3

Thermal overload protection, two time constants TRPTTR (49)

Prepare the IED for verification of settings as outlined in the section
settings".
Values of the logical signals for TRPTTR (49) are available on the local HMI under Main menu/
Tests/Function status/Current/TRPTTR(49,T>)/TRPTTR:X. The Signal Monitoring in PCM600
shows the same signals that are available on the local HMI.
7.4.3.1

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 A 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 A 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
Wait 5 minutes to empty the thermal memory and set Time Constant 2 (
with the setting plan.
15. Test with injection current 1.50 ·
and the lockout reset in the same way as described for stage
16. Finally check that pickup and trip information is stored in the event menu.
Busbar protection REB650
Commissioning manual
Tau1 ) and Time Constant 2 ( Tau2 ) temporarily to 1 minute.
Observe the maximum permitted overloading of the current circuits in the
IED.
IBase1 .
IBase1 in accordance with the setting plan.
Tau1 ).
IBase1 and injection current 1.50 · IBase1 , the trip time from zero
IBase2 the thermal alarm level, the operate time for tripping
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Blocked to Yes , for each individual function that
IBase1 for phases B and C.
IBase2 in the same way as
IBase2 .
IBase1 .
Tau1 ).
Testing functionality
SEMOD53632-3 v5.1.1
"Preparing the IED to verify
IBase2 .
IBase2 .
Tau2 ) in accordance
IBase1 .
Section 7
SEMOD53632-11 v6
47