CYG PRS-7367 - Reverse power protection 32 R

Protection Functions
150 PRS-7367
location greatly decreases the downtime of the protected lines and increases the total availability
of a power system. 21FL provides the distance to the fault together with the information about the
measuring loop that has been used in the calculation. Also, an estimate for the fault resistance at
the fault point is calculated.
3.28.4 21FL Settings
Table 3.28-3 21FL Settings
No.
Name
Range
Unit
Step
Default
Description
1
21FL_LineLen
0-655
KM
0.01
100
The whole line length
2
21FL_PosZ
(0.05~655)/In
OHM
0.1
10
The positive sequence impendence
amplitude
3
21FL_PosAng
30~89
°
0.001
80
The positive sequence impendence
angle
4
21FL_ZeroCoe
0~2
-
0.001
0.67
The zero sequence impendence
coefficient
5
21FL_Ena
0~1
-
1
0
Operation Enable/Disable
3.29 Reverse power protection 32R
3.29.1 32R Overview
The feeder relay provides a two-stage power protection with independent definite time delay
characteristics, and each stage has the same protection logics.
This function contains a blocking functionality. It is possible to block the function outputs, timer
or the function itself, if desired.
3.29.1.1 Function Block
The function block of the protection is as below.
U3P
32R
Block
Str
Op
I3P
Figure 3.29-1 Function block
3.29.1.2 Signals
Table 3.29-1 Input Signals
Signal
Description