6. Slowly decrease the positive-sequence voltage of the injected voltage below the
ULowLimit
value until the
START
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
START
signal reappears.
11. Slowly increase the positive-sequence voltage of the injected voltage above the
UHighLimit
value until the
START
signal disappears.
12. Compare the reset value to the set voltage high limit value.
12.7.4.2
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.
12.8
Multipurpose protection
12.8.1
General current and voltage protection CVGAPC
Prepare the IED for verification of settings as outlined in section
and
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.
1MRK502053-UEN B
Section 12
Testing functionality by secondary injection
Generator protection REG670 2.0 IEC
193
Commissioning manual
Содержание REG670 2.0 IEC
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