ABB Relion 670 series, Technical Reference Manual, Page: 553 / 1232

Function Enable
TEST-ACTIVE
AND
TEST
OR
PU_V_A
PU_V_B
PU_V_C
tPulse
AND
AND
OR
AND
only 1 or 2 phases are low for
at least 10 s (not three)
OR
AND
OR
Reset Enable
Set Enable
OR
Line restored for
at least 3 s
Latched
Enable
ANSI07000089_2_en.vsd
PICKUP
TRIP
0-tTrip
0
0-tBlock
0
0-tRestore
0
CBOPEN
VTSU
BLOCK
Blocked = Yes
ANSI07000089 V2 EN
Figure 279: Simplified diagram of Loss of voltage check LOVPTUV (27)
8.6.3 Function block
ANSI07000039-2-en.vsd
LOVPTUV (27)
V3P*
BLOCK
CBOPEN
VTSU TRIP
PICKUP
ANSI07000039 V2 EN
Figure 280: LOVPTUV (27) function block
1MRK505222-UUS C
Section 8
Voltage protection
547
Technical reference manual