4.4.3 Residual overvoltage protection ROVPTOV
4.4.3.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Residual overvoltage protection ROVPTOV Uo> 59G
4.4.3.2 Function block
A070766 V3 EN
Figure 216: Function block
4.4.3.3 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.
4.4.3.4 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 217: Functional module diagram
Section 4 1MRS758755 A
Protection functions
422 REC615 and RER615
Technical Manual
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