ABB Relion, Technical Manual, Page: 305 / 778

9.3.8 Technical data
Table 171: ROV2PTOV (59N) technical data
Function Range or value Accuracy
Operate voltage, step 1 (1-200)% of
VBase
± 0.5% of V
n
at V < V
n
± 0.5% of V at V > V
n
Operate voltage, step 2 (1–100)% of
VBase
± 0.5% of V
n
at V < V
n
± 0.5% of V at V > V
n
Reset ratio > 98% -
Inverse time
characteristics for low and
high step, see table 579
- See table 579
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, pickup
function
30 ms typically at 0 to 2 x V
set
-
Reset time, pickup
function
40 ms typically at 2 to 0 x V
set
-
Critical impulse time 10 ms typically at 0 to 1.2 xV
set
-
Impulse margin time 15 ms typically -
9.4 Overexcitation protection OEXPVPH (24)
9.4.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Overexcitation protection OEXPVPH
U/f >
SYMBOL-Q V1 EN
24
9.4.2 Functionality
When the laminated core of a power transformer or generator is subjected to a magnetic
flux density beyond its design limits, stray flux will flow into non-laminated components
1MRK 502 048-UUS A
Section 9
Voltage protection
299
Technical manual