Technical Data; Two Step Residual Overvoltage Protection Rov2Ptov; Identification; Functionality - ABB REG650 Technical Manual

Section 8
Voltage protection
8.2.8
8.3
8.3.1
8.3.2
230

Technical data

Table 137: OV2PTOV technical data
Function Range or value
Operate voltage, low (1-200)% of
and high step
Reset ratio >95%
Inverse time -
characteristics for
low and high step,
see table 484
Definite time delay, (0.00 - 6000.00) s
step 1
Definite time delays, (0.000-60.000) s
step 2
Minimum operate (0.000-60.000) s
time, Inverse
characteristics
Operate time, start 30 ms typically at 0 to 2 x U
function
Reset time, start 40 ms typically at 2 to 0 x U
function
Critical impulse time 10 ms typically at 0 to 2 x U
Impulse margin time 15 ms typically
Two step residual overvoltage protection
ROV2PTOV

Identification

Function description
Two step residual overvoltage
protection

Functionality

Residual voltages may occur in the power system during earth faults.
Two step residual overvoltage protection ROV2PTOV function calculates the
residual voltage from the three-phase voltage input transformers or measures it
from a single voltage input transformer fed from an open delta or neutral point
voltage transformer.
UBase
set
set
set
IEC 61850 IEC 60617
identification identification
ROV2PTOV
IEC10000168 V1 EN
1MRK 502 034-UEN -
Accuracy
± 0.5% of U at U < U
r r
± 0.5% of U at U > U
r
-
See table 484
± 0.5% ± 25 ms
± 0.5% ± 25 ms
± 0.5% ± 25 ms
-
-
-
-
ANSI/IEEE C37.2
device number
59N
3U0>
Technical Manual