As the operating voltage is adjusted on the stabilizing resistor
and with the setting of the resistor value in the function this is
essential for the measurement of the expected value. Normally
a slightly higher operating value is no problem as the
sensitivity is not influenced much.
2.
Connect the trip contact to the test set to stop the test set for measurement of
trip times below.
3.
Increase the voltage and make note of the operate value
U>Trip
. This is done
with manual test and without trip of the test set.
4.
Reduce the voltage slowly and make note of the reset value. The reset value
must be high for this function.
5.
Check the operating time by injecting a voltage corresponding to 1.2 ·
U>Trip
level. Make note of the measured trip time.
6.
If required, verify the trip time at another voltage. Normally 2 ·
U>Trip
is
selected.
7.
If used, measure the alarm level operating value. Increase the voltage and
make note of the operate value
U>Alarm
. This is done with manual test and
without trip of the test set.
8.
Measure the operating time on the alarm output by connecting the stop of the
test set to an output from
tAlarm
. Inject a voltage 1.2 ·
U>Alarm
and measure
the alarm time.
9.
Check that trip and alarm outputs operate accordingly to the configuration logic.
10. Finally check that start and alarm information is stored in the event menu and
if a serial connection to the SA is available verify that the correct and only the
required signals are presented on the local HMI and on the SCADA system.
Information on how to use the event menu is found in the operator's
manual.
6.3.3.2
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/Differential/HZPDIF(87,IdN)/X:HZPDIF
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.
1MRK 504 126-UEN -
Section 6
Testing functionality
43
Commissioning Manual