GE LPS-O - Page 35

GE Power Management LPS-O Line Protection System 1-
21
1 PRODUCT DESCRIPTION 1.8 PROTECTION SCHEME DESCRIPTIONS
1
Figure 1–8: STEP DISTANCE LOGIC DIAGRAM
FAULT DETECTOR
LINE PICKUP
8
10
(ZONE 2)
B
0
B = 0.2- 3.0 SEC
TL2P
PHASE
DISTANCE
REMOTE
OPEN
PHASE
DISTANCE
GROUND
BACKUP
50G
51G
OVER-
CURRENT
SUPERVISION
IT
IB
PHASE
DISTANCE
PHASE
DISTANCE
PHASE
BACKUP
50P
OSBALL
C
0
D
0
TL4P
TL3P
13
28
11
OSB
4
11
C = 0.4-6 SEC
D = 0.4-6 SEC
(ZONE 4)
OSB
OSB
(ZONE 3)
ZONE 4
ZONE 3
ZONE 1
ZONE 2
13
OSB
STP_DST3.VSD
OUT OF STEP
BLOCKING LOGIC
OSB
SETT#
1601-1607
(CNFTRP)
CONFIGURABLE
TRIP BUS
(TRIP)
TRIP
BUS
44
7
7
6
SUPERVISE
ZONE 4
FFB
SETT# 705