Residual Overvoltage Protection Rovptov; Identification; Function Block; Functionality - ABB RELION 611 Series Technical Manual

Section 4
Protection functions
4.5.3
4.5.3.1
4.5.3.2
4.5.3.3
4.5.3.4
268

Residual overvoltage protection ROVPTOV

Identification

Function description
Residual overvoltage protection

Function block

A070766 V3 EN
Figure 126: Function block

Functionality

The residual overvoltage protection function ROVPTOV is used in distribution
networks where the residual overvoltage can reach non-acceptable levels in, for
example, high impedance earthing.
The function starts when the residual voltage exceeds the set limit. ROVPTOV
operates with the definite time (DT) characteristic.
The function contains a blocking functionality. It is possible to block function outputs,
the definite timer or the function itself, if desired.

Operation principle

The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The operation of ROVPTOV can be described by using a module diagram. All the
modules in the diagram are explained in the next sections.
A070748 V2 EN
Figure 127: Functional module diagram
IEC 61850 IEC 60617
identification identification
ROVPTOV Uo>
1MRS757454 D
ANSI/IEEE C37.2
device number
59G
611 series
Technical Manual