GE L30 User Manual

GE Multilin L30 Line Current Differential System 8-17
8 THEORY OF OPERATION 8.2 OPERATING CONDITION CHARACTERISTICS
8
Figure 8–7: RESTRAINT CHARACTERISTICS
831726A1.CDR
(Angle between loc and rem is
ideally 0 for internal fault)
II
o
1 - For rem =1.5 pu and angle 0-360 with respect to locII
o
2 - For rem =3 pu and angle 0-360 with respect to locII
o
OPERATE
Iloc
Irem
-3
IIloc - rem
180
150
120
90
60 30
-30
-60
-90
-120
-150
-180
1
2
3
4
0
I
I
loc
rem
RESTRAINT
RESTRAINT
1
2
Boundary point (angle between loc and rem about 130 )II
o
Trip point (angle between
loc and rem 0 )II
o
Boundary point (angle between loc and rem about 140 )II
o
OPERATE
1
2
I
I
loc
rem
Imaginary
-2
2
3
1
2
3
4
I
I
loc
rem
Real
-1
-2
Restraint point (angle between
loc and rem 180 )II
o
-3
-4
1
-1
RESTRAINT
0

GE L30 Specifications

General

Brand	GE
Model	L30
Category	Relays
Language	English