Preparing The Ied To Verify Settings - Hitachi 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 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 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.
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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 trip 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 On for the
access point where the merging unit is configured.
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1MRK506371-UUS Rev. M
M11741-2 v13
Line distance protection REL670
Commissioning manual