1-24
ALPS Advanced Line Protection System
GE Power Management
1.8 PROTECTION SCHEMES
1 PRODUCT DESCRIPTION
1
Figure 1–10: STEP DISTANCE LOGIC DIAGRAM
F A U L T
D E T E C T O R
L I N E P I C K U P
( C A N C L )
(RI)
B
0
8
1 0
( Z O N E 2 )
T L 2 G
B
0
B = 0.2 to 3.0 sec.
T L 2 P
P H A S E
D I S T A N C E
G R O U N D
D I S T A N C E
R E M O T E
O P E N
P H A S E
D I S T A N C E
G R O U N D
D I S T A N C E
G R O U N D
B A C K U P
5 0 G
5 1 G
O V E R -
C U R R E N T
S U P E R V I S I O N
IT
IB
P H A S E
D I S T A N C E
G R O U N D
D I S T A N C E
P H A S E
D I S T A N C E
G R O U N D
D I S T A N C E
P H A S E
B A C K U P
5 0 P
O S B A L L
C
0
C
0
D
0
D
0
T L 4 G
T L 4 P
T L 3 G
T L 3 P
1 3
2 8
1 2
1 1
O S B
1
4
1 1
1 1
C = 0.4 to 6 sec.
D = 0.4 to 6 sec.
( Z O N E 4 )
O S B
O S B
( Z O N E 3 )
REVERSIBLE
ZONE 4
ZONE 3
ZONE 1
OVERREACHING ZONE /
ZONE 2
1 3
O S B
S T P _ D S T 3 . V S D
O U T O F S T E P
B L O C K I N G
L O G I C
O S B
Settings 1601 to 1607
( C N F T R P )
C O N F I G U R A B L E
T R I P B U S
8
R E C L O S E C A N C E L
R E C L O S E I N I T I A T E
B L O C K
R E C L O S I N G
Settings 801-810
9
( T R I P )
T R I P
B U S
4 4
7
7
6
S U P E R V I S E
Z O N E 4
F F B
Setting 714
9