9.1.2
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.
Set and configure the function(s) 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.
1MRK 505 372-UEN A
Section 9
Testing IED operation
Busbar protection REB670 2.2 IEC
69
Commissioning manual
