Check in the same way as the operate and reset values of
IBase1
for phases
L2 and L3.
5.
Activate the digital input for cooling input signal to switch over to base
current
IBase2
.
6.
Check for all three phases the operate and reset values for
IBase2
in the same
way as described above for stage
IBase1
7.
Deactivate the digital 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 L1 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.
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 (
Tau1
).
With setting Itr = 101%
IBase1
and injection current 1.50 ·
IBase1
, the trip
time from zero content in the memory shall be 0.60 · Time Constant 1 (
Tau1
).
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 digital input for cooling input signal to switch over to base
current
IBase2
.
Wait 5 minutes to empty the thermal memory and set Time Constant 2 (
Tau2
)
in accordance with the setting plan.
15. Test with injection current 1.50 ·
IBase2
the thermal alarm level, the operate
time for tripping and the lockout reset in the same way as described for stage
IBase1
.
16. Finally check that start and trip information is stored in the event menu.
6.4.5.2
Completing the test
Continue to test another function or end the testing by setting the parameter
TestMode
to
Off
under
Main menu/Tests/IED test mode/1:TESTMODE
. If
another function is tested, then set the parameter
Blocked
to
No
under
Main menu/
Tests/Function test modes/Current/TRPTTR(49,T>)/X:TRPTTR
for the
function, or for each individual function in a chain, to be tested next. Remember to
set the parameter
Blocked
to
Yes
, for each individual function that has been tested.
6.4.6
Breaker failure protection CCRBRF
Prepare the IED for verification of settings as outlined in
.
Values of the logical signals for CCRBRF are available on the local HMI under
Main menu/Tests/Function status/Current/CCRBRF(50BF)/1:CCRBRF
. The
1MRK 504 126-UEN -
Section 6
Testing functionality
49
Commissioning Manual