GE ALPS - Page 44

1-32 ALPS Advanced Line Protection System
GE Power Management
1.8 PROTECTION SCHEMES 1 PRODUCT DESCRIPTION
1
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
closed when the associated carrier set is removed from service to prevent overtripping on external faults.
Figure 1–16: INTERCONNECTION DIAGRAM FOR BLOCKING SCHEME WITH CS28A
Figure 1–17: INTERCONNECTION DIAGRAM FOR BLOCKING SCHEME WITH CS61C
(+) BATTERY
(-) BATTERY
RATB1
(RECEIVER
OUTPUT)
(SWITCHED POSITIVE BATTERY)
(SWITCHED NEGATIVE BATTERY)
17
13
938
14
26
417
318
510
37 8
B21
B5
KT1
NOTE:
NC CONTACTS ARE
ALSO AVAILABLE FOR CARRIER
START/STOP.
D18
D2
CC1
(RECEIVED
CARRIER)
ALPS
ALPS SET FOR BLOCKING SCHEME
PICKSCHEME
= 4 (BLOCKING)
CS28A
INTERCONNECT DIAGRAM
FOR PILOT BLOCKING SCHEME
USING CS28A CARRIER SET
AND
ALPS RELAY SYSTEM
1413
239
340
U13
U12
U11
U10
B6
B23
KT2
START
STOP
(START)
(STOP)
(REDUCED
POWER)
(SUPERVISORY)
SHOWN FOR THE DEFAULT
ALPS I/O ASSIGMENTS
(+) BATTERY
(-) BATTERY
TB2 TA
SATB3
('U' LOGIC
OUTPUT)
(SWITCHED POSITIVE BATTERY)
(SWITCHED NEGATIVE BATTERY)
KEY
TRANSMITTER
TO TRIP
DC
ISOL.
83
4
510
9
92
65
79
96
87
B21
B5
KT1 KEY TRANSMITTER D18
D2
CC1
(RECEIVED
TRIP SIGNAL)
ALPS
ALPS SET FOR HYBRID SCHEME
PICKSCHEME
= 3 (HYBRID)
CS61C
INTERCONNECT DIAGRAM
FOR HYBRID SCHEME
USING CS61C UNBLOCKING CARRIER SET
AND ALPS RELAY SYSTEM
SHOWN FOR THE DEFAULT
ALPS I/O ASSIGMENTS