Section 4
Testing IED operation
4.1
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 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 analogue (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.
•
Set and configure the functions before testing.
Most functions are highly flexible and permit a choice of functional and tripping
modes. The various modes are checked at the factory as part of the design
verification. In certain cases, only modes with a high probability of coming into
operation need to be checked when commissioned to verify the configuration and
settings.
Requirements for testing the function.
1MRS756801 E
Section 4
Testing IED operation
630 series
23
Commissioning Manual