ABB 615 Series ANSI, Technical Manual

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Section 4
1MAC050144-MB C
Protection functions
280 615 series ANSI
Technical Manual
4.4 Power protection
4.4.1 Three phase directional power protection
The directional positive sequence power protection (32P) function detects power direction
for phase directional power. Release signal is given if the angle difference polarizing and
operating quantity is in predefined direction (forward or reverse direction). The release
signal is given with definite time delay.
4.4.1.1 Identification
4.4.1.2 Function block
Figure 131: Function block
4.4.1.3 Functionality
The directional positive sequence power protection (32P) function is used to detect
positive sequence power direction. The output of the function is used for blocking or
releasing other functions in protection scheme.
This function contains a blocking functionality which blocks function output and resets the
timer.
4.4.1.4 Operation principle
The function can be enabled and disabled with the Operation setting. The corresponding
parameter values are “On” and “Off”.
The operation of 32P can be described by using a module diagram (see Figure 132). All
the modules in the diagram are explained in the next sections.
Functional description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Directional positive sequence power
protection
DPSRDIR P>-> 32P
RELEASE
I1
32P
V1
BLOCK