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 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.
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 first parameter setting group and the remaining is that there
is no need for testing the connections.
1MRK 502 049-UEN A
Section 5
Testing IED operation
35
Commissioning manual
