7.1.8 Technical data
Table 116: 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 <102% -
Inverse time
characteristics for low and
high step, see table 577
-
See table 577
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 0.5V
set
-
Reset time, pickup
function
25 ms typically at 0 to 2 x V
set
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 -
7.2 Two step overvoltage protection OV2PTOV (59)
7.2.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Two step overvoltage protection OV2PTOV
SYMBOL-C-2U-SMALLER-THAN
V2 EN
59
7.2.2 Functionality
Overvoltages may occur in the power system during abnormal conditions such as sudden
power loss, tap changer regulating failures, and open line ends on long lines.
1MRK 511 287-UUS A Section 7
Voltage protection
173
Technical manual
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