ABB RELION RET670, Руководство по вводу в эксплуатацию, Страница: 97 / 328

included in the test mode and is not prevented to trip 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 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.
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.
10.2 Activating the test mode
Put the IED into the test mode before testing. The test mode blocks all protection functions
and some of the control functions in the IED, and the individual functions to be tested can
be unblocked to prevent unwanted operation caused by other functions. In this way, it is
possible to test slower back-up measuring functions without the interference from faster
measuring functions. The test switch should then be connected to the IED.Test mode is
indicated when the yellow PickupLED flashes.
1MRK 504 165-UUS -
Section 10
Testing IED operation
Transformer protection RET670 2.2 ANSI 91
Commissioning manual