ABB Relion 670 series, Installation And Commissioning Manual

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15.8.3.2 Completing the test
Continue to test another function or end the test by changing the Test mode setting
to Off . Restore connections and settings to their original values, if they were
changed for testing purposes.
15.9 Multipurpose protection
15.9.1 General current and voltage protection CVGAPC
Prepare the IED for verification of settings as outlined in section "Overview" and
section "Preparing for test" in this chapter.
One of the new facilities within the general current and voltage protection function
CVGAPC is that the value, which is processed and used for evaluation in the
function, can be chosen in many different ways by the setting parameters
CurrentInput and VoltageInput .
These setting parameters decide what kind of preprocessing the connected three-
phase CT and VT inputs shall be subjected to. That is, for example, single-phase
quantities, phase-to-phase quantities, positive sequence quantities, negative
sequence quantities, maximum quantity from the three-phase group, minimum
quantity from the three-phase group, difference between maximum and minimum
quantities (unbalance) can be derived and then used in the function.
Due to the versatile possibilities of CVGAPC itself, but also the possibilities of
logic combinations in the application configuration of outputs from more than one
CVGAPC function block, it is hardly possible to define a fully covering general
commissioning test.
When inverse time overcurrent characteristic is selected, the
operate time of the stage will be the sum of the inverse time delay
and the set definite time delay. Thus, if only the inverse time delay
is required, it is of utmost importance to set the definite time delay
for that stage to zero.
15.9.1.1 Built-in overcurrent feature (non-directional)
Procedure
1. Go to Main menu/Test/Function test modes/Multipurpose protection/
GeneralCurrentVoltage(GAPC)/CVGAPC:x and make sure that CVGAPC
Section 15
1MRK 502 029-UEN A
Verifying settings by secondary injection
204
Installation and commissioning manual