ABB Relion 670 Series Technical Reference Manual page 589

1MRK505222-UUS C
Selected voltage
PickupVolt_UV1
Operation_UV1=On
BLKUV1
ANSI05000752 V1 EN
Figure 298: Simplified internal logic diagram for built-in first undervoltage step UV1 (step UV2 has the same
internal logic)
10.1.3
Technical reference manual
a
b>a
b
AND
Inverse time
Function block
CVGAPC
I3P* TRIP
V3P* TROC1
BLOCK TROC2
BLKOC1 TRUC1
BLKOC1TR TRUC2
ENMLTOC1 TROV1
BLKOC2 TROV2
BLKOC2TR TRUV1
ENMLTOC2 TRUV2
BLKUC1 PICKUP
BLKUC1TR PU_OC1
BLKUC2 PU_OC2
BLKUC2TR PU_UC1
BLKOV1 PU_UC2
BLKOV1TR PU_OV1
BLKOV2 PU_OV2
BLKOV2TR PU_UV1
BLKUV1 PU_UV2
BLKUV1TR BLK2ND
BLKUV2 DIROC1
BLKUV2TR DIROC2
VDIRLOW
CURRENT
ICOSFI
VOLTAGE
VIANGLE
ANSI05000372-2-en.vsd
ANSI05000372 V2 EN
Figure 299: CVGAPC function block
DEF time
0-DEF
selected
0
Inverse
selected
Section 10
Multipurpose protection
BLKTRUV1
AND
OR
en05000752_ansi.vsd
TRUV1
PU_UV1
583