Section 5
Testing IED operation
5.1
Preparing the IED to verify settings
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 test functions and test and signal parameter names, see the technical manual. The
correct initiation of the disturbance recorder is made on pickup and/or release or trip from
a function. Also check that the wanted recordings of analog (real and calculated) and
binary signals are achieved.
The IEDs in the 650 series can have between 1 and 4 individual parameter setting groups
prepared with full sets of different parameters for all functions. The purpose of these
groups is to be able to handle different power system load conditions to optimize the
parameters settings of the different functions for these different power systems conditions
(for example summer/winter and day/night).
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
1MRK 505 293-UUS A
Section 5
Testing IED operation
37
Commissioning manual
