Preparing The Connection To The Test Equipment - ABB RET670 Installation And Commissioning Manual

1MRK 504 088-UEN C
13.2.2
Installation and commissioning manual
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.
The disturbance report settings must be checked to ensure that indications are correct.
Functions to test, signal and parameter names can be found in the technical
reference 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 the
tests must be repeated 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.
Observe during testing that the right method for testing must be used that
corresponds to the actual parameters set in the activated parameter setting group.
Set and configure the function(s) before the testing can start. 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.

Preparing the connection to the test equipment

The IED can be equipped with a test switch of type RTXP8, RTXP18 or RTXP24.
The test switch and its associated test plug handle (RTXH8, RTXH18 or RTXH24)
are a part of the COMBITEST system, which provides secure and convenient
testing of the IED.
When using the COMBITEST, preparations for testing are automatically carried
out in the proper sequence, that is for example, blocking of tripping circuits, short
circuiting of CT's, opening of voltage circuits, making IED terminals available for
secondary injection). Terminals 1 and 8, 1 and 18 as well as 1 and 12 of the test
switches RTXP8, RTXP18 and RTXP24 respectively are not disconnected as they
supply DC power to the protection IED.
The RTXH test-plug handle leads may be connected to any type of test equipment
or instrument. When a number of protection IEDs of the same type are tested, the
test-plug handle only needs to be moved from the test switch of one protection IED
to the test switch of the other, without altering previous connections.
Use COMBITEST test system to prevent unwanted tripping when the handle is
withdrawn, since latches on the handle secure it in the half withdrawn position. In
this position, all voltages and currents are restored and any reenergizing transients
Verifying settings by secondary injection
Section 13
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