Preparing The Ied To Verify Settings - ABB Relion 670 Series Commissioning Manual

Section 10
Testing IED operation
10.1.2

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
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This IED is designed for a maximum continuous current of four times the rated
current.
All references to CT and VT must be interpreted as analog values received from
merging units (MU) via IEC/UCA 61850-9-2LE communication protocol, analog
values received from the transformer input module, or analog values received
from the LDCM.
When using a MU test simulator, make sure it is set to the correct SVID and that
the system frequency is set to the same as in the IED.
Please observe the measuring accuracy of the IED, the test equipment and the
angular accuracy for both of them.
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".
If the IED is used together with a merging unit and no time synchronization is
available, for example, in the laboratory test, the IED will synchronize to the SV
data stream. During the re-synchronization, the protection functions will be
blocked once a second for about 45 ms, and this will continue for up to 10
minutes. To avoid this, configure PTP (IEEE 1588) to
where the merging unit is configured.
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