CYG PRS-7367 User Manual

Protection Functions
PRS-7367 55
The evaluation of the backward directionality is according to the equation:
)5(270arg)5(90







o
U
jRCA
e
o
I
5
o

is the max angle margin.
0
I
and
0
U
are the current and voltage of the Self-polarizing. RCA
is the Relay characteristic angle, which is used to turn the direction element to best comply with
the fault situation.
The directionality of the operation can be selected with the 67G_Dir_Mod setting. The user can
select either "Non-directional", "Forward" or "Reverse" operation.
The directionality also can be use in double circuit line by negative current and voltage, it can be
enable or disable by setting 67G1_PolU, when 67G1_PolU=1, the condition is following:
Self-polarizing is used (I
2
-(-U
2
)) to determine the fault direction.
The evaluation of the forward directionality is according to the equation:
2
90 ( 5 ) arg 90 ( 5 )
2
jRCA
Ie
U
    

The evaluation of the backward directionality is according to the equation:
2
90 ( 5 ) arg 270 ( 5 )
2
jRCA
Ie
U
   

 Voltage control element
1
67G_Vol_Ena=1SET
Uo>67G_Vol_StrANA
&
67G_VCE_Str
FLG
67G_Vol_Ena=0SET
Figure 3.5-3 The voltage control logic diagram
 PTS Alarm Blocking of 67G
The PTS alarm can be set by PTS_Blk setting, if PTS_Blk=1 and the PTS Alm signal is 1, the 67G

CYG PRS-7367 Specifications

General

Brand	CYG
Model	PRS-7367
Category	Control Unit
Language	English