ABB Relion 670 series - Page 694

There is a risk that the current into the generator at inadvertent energization will be limited so
that the “normal” overcurrent or underimpedance protection will not detect the dangerous
situation. The delay of these protection functions might be too long. For big and important
machines, fast protection against inadvertent energizing should, therefore, be included in the
protective scheme.
11.1.3 Function block
M13748-3 v3
ANSI05000372-2-en.vsd
CVGAPC
I3P*
V3P*
BLOCK
BLKOC1
BLKOC1TR
ENMLTOC1
BLKOC2
BLKOC2TR
ENMLTOC2
BLKUC1
BLKUC1TR
BLKUC2
BLKUC2TR
BLKOV1
BLKOV1TR
BLKOV2
BLKOV2TR
BLKUV1
BLKUV1TR
BLKUV2
BLKUV2TR
TRIP
TROC1
TROC2
TRUC1
TRUC2
TROV1
TROV2
TRUV1
TRUV2
PICKUP
PU_OC1
PU_OC2
PU_UC1
PU_UC2
PU_OV1
PU_OV2
PU_UV1
PU_UV2
BLK2ND
DIROC1
DIROC2
VDIRLOW
CURRENT
ICOSFI
VOLTAGE
VIANGLE
ANSI05000372 V2 EN-US
Figure 370: CVGAPC function block
11.1.4 Signals
PID-3857-INPUTSIGNALS v6
Table 403: CVGAPC Input signals
Name Type Default Description
I3P GROUP
SIGNAL
- Group signal for current input
V3P GROUP
SIGNAL
- Group signal for voltage input
BLOCK BOOLEAN 0 Block of function
BLKOC1 BOOLEAN 0 Block of over current function OC1
BLKOC1TR BOOLEAN 0 Block of trip for over current function OC1
ENMLTOC1 BOOLEAN 0 When activated, the current multiplier is in use for OC1
BLKOC2 BOOLEAN 0 Block of over current function OC2
BLKOC2TR BOOLEAN 0 Block of trip for over current function OC2
ENMLTOC2 BOOLEAN 0 When activated, the current multiplier is in use for OC2
BLKUC1 BOOLEAN 0 Block of under current function UC1
Table continues on next page
Section 11 1MRK 502 066-UUS B
Multipurpose protection
688
Technical manual