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Characteristic
Value
df/dt
<120 ms
Reset time
<150 ms
Operate time accuracy
±1.0% of the set value or ±30 ms
4.6
Power protection
4.6.1
Three-phase power directional element DPSRDIR
4.6.1.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase power directional ele-
ment
DPSRDIR
I1->
32P
4.6.1.2
Function block
RELEASE
I1
DPSRDIR
U1
BLOCK
Figure 228: Function block
4.6.1.3
Functionality
The three-phase power directional element DPSRDIR is used to detect positive-
sequence power direction. The output of the function is used for blocking or
releasing other functions in protection scheme.
The directional positive-sequence power protection contains a blocking
functionality which blocks function output and resets Timer.
4.6.1.4
Operation principle
The function can be enabled and disabled with the
Operation setting. The
corresponding parameter values are “On” and “Off”.
The operation of DPSRDIR can be described with a module diagram. All the modules
in the diagram are explained in the next sections.
1MRS758755 C
Protection functions
REC615 & RER615
Technical Manual
467
Содержание Relion REC615
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