Releasing The Function To Be Tested - ABB Relion 670 Series Commissioning Manual

Section 9
Testing IED operation
9.5
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ANSI09000652 V1 EN
Figure 10: Connection example of the test equipment to the IED when test
equipment is connected to the transformer input module

Releasing the function to be tested

Release or unblock the function to be tested. This is done to ensure that only the
function or the chain of functions to be tested are in operation and that other functions
are prevented from operating. Release the tested function(s) by setting the
corresponding Blocked parameter under Function test modes to No in the local HMI.
When testing a function in this blocking feature, remember that not only the actual
function must be activated, but the whole sequence of interconnected functions (from
measuring inputs to binary output contacts), including logic must be activated. Before
starting a new test mode session, scroll through every function to ensure that only the
function to be tested (and the interconnected ones) have the parameters Blocked and
eventually EvDisable set to No and Yes respectively. Remember that a function is also
blocked if the BLOCK input signal on the corresponding function block is active,
which depends on the configuration. Ensure that the logical status of the BLOCK input
signal is equal to 0 for the function to be tested. Event function blocks can also be
individually blocked to ensure that no events are reported to a remote station during the
test. This is done by setting the parameter EvDisable to Yes.
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ANSI09000652-1-en.vsd
1MRK 505 304-UUS -
Busbar protection REB670 2.0 ANSI
Commissioning Manual