7.3.8 Technical data
Table 128: ROV2PTOV technical data
Function
Range or value Accuracy
Operate voltage,
step 1
(1-200)% of
UBase
± 0.5% of U
r
at U < U
r
± 0.5% of U at U > U
r
Operate voltage,
step 2
(1–100)% of
UBase
± 0.5% of U
r
at U < U
r
± 0.5% of U at U > U
r
Reset ratio > 98% -
Inverse time
characteristics for
low and high step,
see table
578
-
See table 578
Definite time setting,
step 1
(0.00–6000.00) s ± 0.5% ± 25 ms
Definite time setting,
step 2
(0.000–60.000) s ± 0.5% ± 25 ms
Minimum operate
time for step 1
inverse characteristic
(0.000-60.000) s
± 0.5% ± 25 ms
Operate time, start
function
30 ms typically at 0 to 2 x U
set
-
Reset time, start
function
40 ms typically at 2 to 0 x U
set
-
Critical impulse time 10 ms typically at 0 to 1.2 xU
set
-
Impulse margin time 15 ms typically -
7.4 Loss of voltage check LOVPTUV
7.4.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Loss of voltage check LOVPTUV - 27
7.4.2 Functionality
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 SDDRFUF.
1MRK 511 287-UEN A Section 7
Voltage protection
175
Technical manual
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