Function Range or value Accuracy
Minimum operate time (0.000-60.000) s ± 0.2% or ± 45 ms
whichever is greater
Operate time, start at 0 to 2 x U
set
Min. = 15 ms
Max. = 30 ms
-
Reset time, start at 2 x U
set
to 0 Min. = 15 ms
Max. = 30 ms
-
Operate time, start at 0 to 1.2 x U
set
Min. = 20 ms
Max. = 35 ms
-
Reset time, start at 1.2 x U
set
to 0 Min. = 5 ms
Max. = 25 ms
-
Critical impulse time 10 ms typically at 0 to 2 x U
set
-
Impulse margin time 15 ms typically -
7.4 Loss of voltage check LOVPTUV
SEMOD171453-1 v3
7.4.1 Identification
SEMOD171954-2 v2
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Loss of voltage check LOVPTUV - 27
7.4.2 Functionality
SEMOD171457-5 v8
Loss of voltage check (LOVPTUV ) is suitable for use in networks with an
automatic system restoration function. LOVPTUV issues a three-pole trip
command to the circuit breaker, if all three phase voltages fall below the set value
for a time longer than the set time and the circuit breaker remains closed.
The operation of LOVPTUV is supervised by the fuse failure supervision
FUFSPVC.
7.4.3 Function block
SEMOD171785-4 v4
IEC07000039-2-en.vsd
LOVPTUV
U3P*
BLOCK
CBOPEN
VTSU
TRIP
START
IEC07000039 V2 EN-US
Figure 87: LOVPTUV function block
Section 7 1MRK 505 384-UEN A
Voltage protection
198 Breaker protection REQ650 2.2 IEC
Technical manual
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