ABB ret650 - Technical Data; Two Step Residual Overvoltage Protection ROV2 PTOV; Identification; Functionality

9.2.8 Technical data
Table 141: OV2PTOV technical data
Function
Range or value Accuracy
Operate voltage,
step 1 and 2
(1-200)% 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
steps 1 and 2, see
table
562
-
See table 562
Definite time delay,
step 1
(0.00 - 6000.00) s ± 0.5% ± 25 ms
Definite time delays,
step 2
(0.000-60.000) s ± 0.5% ± 25 ms
Minimum operate
time, Inverse
characteristics
(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 2 x U
set
-
Impulse margin time 15 ms typically -
9.3 Two step residual overvoltage protection
ROV2PTOV
9.3.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Two step residual overvoltage
protection
ROV2PTOV
3U0>
IEC10000168 V1 EN
59N
9.3.2 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.
Section 9 1MRK 504 135-UEN A
Voltage protection
216
Technical manual