GE ALPS Instruction Manual page 27

1 PRODUCT DESCRIPTION
ALPS WITH THREE-PHASE TRIPPING:
O S B 3 P . V S D
A N Y C O O R D I N A T I N G Z O N E
( P H A S E O R G R O U N D )
A N Y M O B
ALPS WITH SINGLE-PHASE TRIPPING:
PHASE A
O P E N
204
PHASE B
O P E N
205
P H A S E C
O P E N
206
GE Power Management
X
SWING IMPEDANCE
LOCUS
Figure 1–7: OSB R-X DIAGRAM
202
202
201
M T
A - B
M O B
A - B
202
M T
B - C
M O B
B - C
203
M T
C - A
M O B
C - A
Figure 1–8: OSB LOGIC DIAGRAMS
ALPS Advanced Line Protection System
1.4 AUXILIARY PROTECTION FUNCTIONS
MT (ZONE 2 / 3 / 4)
MOB
R
OSBRXDiag.CDR
TL1
*
* 30 ms. INITIAL PICKUP TIME
ADAPTIVE AFTER FIRST SLIP CYCLE
201
207
202
* 30 ms. INITIAL PICKUP TIME
ADAPTIVE AFTER FIRST SLIP CYCLE
203
O S B
50
TL1
*
O S B
50
O S B 1 P . V S D
1-15
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