Technical Revision History; Negative-Sequence Overvoltage Protection Nsptov; Identification; Function Block - ABB RELION 611 Series Technical Manual

Section 4
Protection functions
4.5.3.10
4.5.4
4.5.4.1
4.5.4.2
4.5.4.3
272
Characteristic
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Residual voltage before fault = 0.0 × U
from random phase angle, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact

Technical revision history

Table 294: ROVPTOV Technical revision history
Technical revision
B
C
D

Negative-sequence overvoltage protection NSPTOV

Identification

Function description
Negative-sequence overvoltage
protection

Function block

GUID-F94BCCE8-841F-405C-B659-3EF26F959557 V1 EN
Figure 128: Function block

Functionality

The negative-sequence overvoltage protection function NSPTOV is used to detect
negative sequence overvoltage conditions. NSPTOV is used for the protection of
machines.
The function starts when the negative sequence voltage exceeds the set limit.
NSPTOV operates with the definite time (DT) characteristics.
The function contains a blocking functionality. It is possible to block function outputs,
the definite timer or the function itself, if desired.
Value
<35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f
, f = 50 Hz, residual voltage with nominal frequency injected
n n
Change
Added a setting parameter for the "Measured Uo"
or "Calculated Uo" selection
Internal improvement
Internal improvement
IEC 61850 IEC 60617
identification identification
NSPTOV U2>
1MRS757454 D
, where n = 2, 3, 4, 5,...
n
ANSI/IEEE C37.2
device number
47O-
611 series
Technical Manual