GE ALPS Instruction Manual page 44

1.8 PROTECTION SCHEMES
The BLOCK PILOT TRIPPING signal is assigned to CC4 in the default settings. BLOCK PILOT TRIPPING disables the
pilot scheme logic, while allowing the backup Zone 1, Zone 2, etc. to function. Typically, an external contact wired to CC4 is
1
closed when the associated carrier set is removed from service to prevent overtripping on external faults.
C S 2 8 A
(RECEIVER
OUTPUT)
(SWITCHED POSITIVE BATTERY)
(START)
(STOP)
( R E D U C E D
P O W E R )
(SUPERVISORY)
(SWITCHED NEGATIVE BATTERY)
Figure 1–16: INTERCONNECTION DIAGRAM FOR BLOCKING SCHEME WITH CS28A
C S 6 1 C
('U' LOGIC
OUTPUT)
(SWITCHED POSITIVE BATTERY)
(SWITCHED NEGATIVE BATTERY)
KEY
TRANSMITTER
TO TRIP
Figure 1–17: INTERCONNECTION DIAGRAM FOR BLOCKING SCHEME WITH CS61C
1-32
T B 1 R A
40 3
39 2
13 14
14 13
38 9
1 7
U11
2 6
U10
4 17
U13
3 18
U12
5 10
37 8
T B 3 S A
9 4
10 5
T B 2 T A
8 3
9 2
6 5
7 9
9 6
D C
ISOL.
8 7
ALPS Advanced Line Protection System
( + ) B A T T E R Y
(-) BATTERY
A L P S S E T F O R B L O C K I N G S C H E M E
PICKSCHEME = 4 (BLOCKING)
S H O W N F O R T H E D E F A U L T
A L P S I / O A S S I G M E N T S
B 5
K T 1
S T A R T
B 2 3
B 2 1
K T 2 S T O P
B 6
N O T E : N C C O N T A C T S A R E
A L S O A V A I L A B L E F O R C A R R I E R
S T A R T / S T O P .
I N T E R C O N N E C T D I A G R A M
F O R P I L O T B L O C K I N G S C H E M E
U S I N G C S 2 8 A C A R R I E R S E T
A N D
A L P S R E L A Y S Y S T E M
A L P S S E T F O R H Y B R I D S C H E M E
PICKSCHEME = 3 (HYBRID)
( + ) B A T T E R Y
S H O W N F O R T H E D E F A U L T
A L P S I / O A S S I G M E N T S
(-) BATTERY
B 5
K T 1 K E Y T R A N S M I T T E R
B 2 1
I N T E R C O N N E C T D I A G R A M
F O R H Y B R I D S C H E M E
U S I N G C S 6 1 C U N B L O C K I N G C A R R I E R S E T
A N D A L P S R E L A Y S Y S T E M
1 PRODUCT DESCRIPTION
A L P S
D 2
( R E C E I V E D
C C 1
C A R R I E R )
D 1 8
A L P S
D 2
( R E C E I V E D
C C 1
TRIP SIGNAL)
D 1 8
GE Power Management