Multipurpose Protection; General Current And Voltage Protection Cvgapc; Built-In Overcurrent Feature (Non-Directional) - ABB rec670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.7
10.7.1
10.7.1.1
132

Multipurpose protection

General current and voltage protection CVGAPC

Prepare the IED for verification of settings as outlined in section
section "Preparing for test"
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.

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
to be tested is unblocked and other functions that might disturb the evaluation of
the test are blocked.
2. Connect the test set for injection of three-phase currents to the appropriate
current terminals of the IED.
3. Inject current(s) in a way that relevant measured current (according to setting
parameter CurrentInput) is created from the test set. Increase the current(s) until
the low set stage operates and check against the set operate value.
4. Decrease the current slowly and check the reset value.
5. Block high set stage if the injection current will activate the high set stage when
testing the low set stage according to below.
6. Connect a TRIP output contact to the timer.
7. Set the current to 200% of the operate value of low set stage, switch on the
current and check the time delay.
For inverse time curves, check the operate time at a current equal to 110% of the
operate current at tMin.
in this chapter.
1MRK 511 360-UEN A
"Requirements" and
Bay control REC670 2.1 IEC
Commissioning manual