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1.8 PROTECTION SCHEMES
1
P H A S E
D I S T A N C E
1
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
T L 2 G
G R O U N D
D I S T A N C E
R E M O T E
O P E N
T L 3 P
C = 0.4 to 6 sec.
C
P H A S E
D I S T A N C E
0
T L 3 G
C
G R O U N D
D I S T A N C E
T L 4 P
P H A S E
D
D I S T A N C E
T L 4 G
D
G R O U N D
D I S T A N C E
0
D = 0.4 to 6 sec.
P H A S E
5 0 P
B A C K U P
5 0 G
G R O U N D
B A C K U P
5 1 G
LINE PICKUP
FAULT
D E T E C T O R
IT
O V E R -
C U R R E N T
IB
S U P E R V I S I O N
O U T O F S T E P
B L O C K I N G
L O G I C
1-24
4
O S B
B = 0.2 to 3.0 sec.
T L 2 P
B
0
B
0
( Z O N E 2 )
8
10
O S B
( Z O N E 3 )
11
11
0
O S B
( Z O N E 4 )
0
12
11
O S B
28
S U P E R V I S E
Z O N E 4
O S B
Settings 1601 to 1607
Figure 1–10: STEP DISTANCE LOGIC DIAGRAM
ALPS Advanced Line Protection System
O S B A L L
13
13
F F B
Setting 714
6
9
8
9
B L O C K
R E C L O S I N G
Settings 801-810
1 PRODUCT DESCRIPTION
( 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
44
(TRIP)
7
7
T R I P
B U S
(RI)
R E C L O S E I N I T I A T E
( C A N C L )
R E C L O S E C A N C E L
S T P _ D S T 3 . V S D
GE Power Management
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