ABB REB650, Technical Manual

Page: 135 / 504

8.1.8 Technical data
Table 70: UV2PTUV (27) technical data
Function Range or value Accuracy
Operate voltage, low and
high step
(1–100)% of VBase ± 0.5% of V
n
Reset ratio <105% -
Inverse time
characteristics for low
and high step, see
table 408
- See table 408
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, pickup
function
30 ms typically at 1.2 to 0.5 x V
set
-
Reset time, pickup
function
40 ms typically at 0.5 to 1.2 xV
set
-
Critical impulse time 10 ms typically at 1.2 to 0.8 x V
set
-
Impulse margin time 15 ms typically -
8.2 Two step overvoltage protection OV2PTOV (59)
8.2.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Two step overvoltage protection OV2PTOV
2U>
SYMBOL-C-2U-SMALLER-THAN
V1 EN
59
8.2.2 Functionality
Overvoltages may occur in the power system during abnormal conditions such as
sudden power loss, tap changer regulating failures, open line ends on long lines etc.
1MRK 505 277-UUS C
Section 8
Voltage protection
129
Technical Manual