7.2.8 Technical data
Table 122: OV2PTOV (59) technical data
Function
Range or value Accuracy
Operate voltage, step 1
and 2
(1-200)% of
VBase
± 0.5% of V
n
at V < V
n
± 0.5% of V at V > V
n
Reset ratio >98% -
Inverse time
characteristics for steps 1
and 2, see table 576
-
See table 576
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 0 to 2 x V
set
-
Reset time, pickup
function
40 ms typically at 2 to 0 x V
set
-
Critical impulse time 10 ms typically at 0 to 2 x V
set
-
Impulse margin time 15 ms typically -
7.3 Two step residual overvoltage protection ROV2PTOV
(59N)
7.3.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Two step residual overvoltage
protection
ROV2PTOV
IEC10000168 V1 EN
59N
7.3.2 Functionality
Residual voltages may occur in the power system during ground faults.
Two step residual overvoltage protection ROV2PTOV (59N) function calculates the
residual voltage from the three-phase voltage input transformers or measures it from a
1MRK 511 287-UUS A Section 7
Voltage protection
181
Technical manual
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