This IED is designed for a maximum continuous current of four times the rated
current.
Please observe the measuring accuracy of the IED, the test equipment and the
angular accuracy for both of them.
Please consider the configured logic from the function block to the output
contacts when measuring the operate time.
After intense testing, it is important that the IED is not immediately restarted,
which might cause a faulty trip due to flash memory restrictions. Some time
must pass before the IED is restarted. For more information about the flash
memory, refer to section “Configuring the IED and changing settings”.
11.1.2
Preparing the IED to verify settings
M11741-2 v11
If a test switch is included, start preparation by making the necessary connections to the test
switch. This means connecting the test equipment according to a specific and designated IED
terminal diagram.
Put the IED into the test mode to facilitate the test of individual functions and prevent
unwanted operation caused by other functions. The busbar differential protection is not
included in the test mode and is not prevented to operate during the test operations. The test
switch should then be connected to the IED.
Verify that analog input signals from the analog input module are measured and recorded
correctly by injecting currents and voltages required by the specific IED.
To make testing even more effective, use PCM600. PCM600 includes the Signal monitoring
tool, which is useful in reading the individual currents and voltages, their amplitudes and
phase angles. In addition, PCM600 contains the Disturbance handling tool. The content of
reports generated by the Disturbance handling tool can be configured which makes the work
more efficient. For example, the tool may be configured to only show time tagged events and
to exclude analog information and so on.
Check the disturbance report settings to ensure that the indications are correct.
For information about the functions to test, for example signal or parameter names, see the
technical manual. The correct initiation of the disturbance recorder is made on start and/or
release or trip from a function. Also check that the wanted recordings of analog (real and
calculated) and binary signals are achieved.
Parameters can be entered into different setting groups. Make sure to test
functions for the same parameter setting group. If needed, repeat the tests for
all different setting groups used. The difference between testing the first
parameter setting group and the remaining is that there is no need for testing
the connections.
During testing, observe that the right testing method, that corresponds to the actual
parameters set in the activated parameter setting group, is used.
Section 11
1MRK 502 067-UEN B
Testing IED operation
86
Commissioning manual
