ABB RES670 2.1, Commissioning Manual

Page: 151 / 202

Verification of voltage band limit check logic
1. Ensure that the settings in the IED are appropriate to the default settings, especially
the PickupCurrentLevel , FreqHighLimit , FreqLowLimit , VHighLimit and
VLowLimit settings.
2. Ensure that the EnaVoltCheck is enabled.
3. Supply the IED with three-phase currents and voltages at their rated values.
4. Check that the
VOLTOK
signal appears.
5. Slowly decrease the frequency of the applied voltage until the
BFI_3P
signal
appears.
6. Slowly decrease the positive-sequence voltage of the injected voltage below the
VLowLimit value until the BFI_3P signal disappears.
7. Check that the
VOLTOK
signal disappears.
8. Compare the reset value to the set voltage low limit value.
9. Readjust the positive-sequence voltage of the applied voltage to a value within the set
voltage band limits.
10. Check that the
BFI_3P
signal reappears.
11. Slowly increase the positive-sequence voltage of the injected voltage above the
VUHighLimit value until the
BFI_3P
signal disappears.
12. Compare the reset value to the set voltage high limit value.
11.6.4.2 Completing the test
• Continue to test another function or end the test by changing the Test mode setting to
Disabled .
• Restore connections and settings to their original values if they were changed for
testing purposes.
11.7 Multipurpose protection
11.7.1 General current and voltage protection CVGAPC
Prepare the IED for verification of settings as outlined in section "Requirements" 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-
1MRK 511 366-UUS -
Section 11
Testing functionality by secondary injection
145
Commissioning manual