ABB Relion 650 Series Technical Manual page 260

Section 7
Voltage protection
LOSS OF VOLTAGE CHECK FUNCTION
TEST
TEST-ACTIVE
BlockLOV = Yes
BLOCK
PU_V_A
PU_V_B
PU_V_C
CBOPEN
BLKV
ANSI08000011 V2 EN-US
Figure 129: Simplified diagram of Loss of voltage check LOVPTUV (27)
7.4.7 Technical data
Table 187: LOVPTUV (27) technical data
Function
Operate voltage
Reset ratio
Pulse timer
Timers
254
AND
>1
A
N
D
Latched
Enable
tBlock
>1
t
>1
Range or value
(0–100)% of VBase
<105%
(0.050–60.000) s
(0.000–60.000) s
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Function Enable
A
N
D
only 1 or 2 phases are low for
at least 10 s (not three)
A
N
D
>1
tRestore
Set Enable
t
Line restored for
at least 3 s
Accuracy
± 0.5% of V
-
± 0.5% ± 25 ms
± 0.5% ± 25 ms
1MRK 506 326-UUS B
PICKUP
tTrip tPulse
t
Reset Enable
A
N
D
>1
Reclosing_Reclaim_and_
Inhibit_timers%3DANSI1
0000257%3D1%3Den%3
DOriginal[1].vsd
n
Line distance protection REL650
Technical manual
TRIP
SEMOD175210-2 v4