Technical Data; Two Step Residual Overvoltage Protection Rov2Ptov; Identification; Functionality - ABB Relion 650 Series REB650 Technical Manual

Section 8
Voltage protection
8.2.8
8.3
8.3.1
8.3.2
140

Technical data

Table 78: OV2PTOV technical data
Function Range or value
Operate voltage, (1-200)% of
step 1 and 2
Reset ratio >98%
Inverse time -
characteristics for
steps 1 and 2, see
table 464
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 505 288-UEN A
Accuracy
± 0.5% of U at U < U
r r
± 0.5% of U at U > U
r
-
See table 464
± 0.5% ± 25 ms
± 0.5% ± 25 ms
± 0.5% ± 25 ms
-
-
-
-
ANSI/IEEE C37.2
device number
59N
3U0>
Technical manual