GE ALPS - Page 27

GE Power Management
ALPS Advanced Line Protection System 1-15
1 PRODUCT DESCRIPTION 1.4 AUXILIARY PROTECTION FUNCTIONS
1
Figure 1–7: OSB R-X DIAGRAM
Figure 1–8: OSB LOGIC DIAGRAMS
MT (ZONE 2 / 3 / 4)
MOB
SWING IMPEDANCE
LOCUS
X
R
OSBRXDiag.CDR
*
50
*
30 ms. INITIAL PICKUP TIME
ADAPTIVE AFTER FIRST SLIP CYCLE
TL1
OSB
202
202
ANY COORDINATING ZONE
(PHASE OR GROUND)
ANY MOB
OSB3P.VSD
*
50
MT
A - B
MOB
A - B
201
* 30 ms. INITIAL PICKUP TIME
ADAPTIVE AFTER FIRST SLIP CYCLE
TL1
OSB
PHASE A
OPEN
201
204
MT
B - C
MOB
B - C
202
PHASE B
OPEN
202
205
MT
C - A
MOB
C - A
203
PHASE C
OPEN
203
206
207
OSB1P.VSD
ALPS WITH SINGLE-PHASE TRIPPING:
ALPS WITH THREE-PHASE TRIPPING: