GE LPS-O - Page 147

GE Power Management LPS-O Line Protection System 5-
19
5 FUNCTIONAL TESTS (FACTORY SETTINGS) 5.3 PHASE-TO-PHASE ZONE REACH TESTING
5
Figure 5–3: PHASE-REACH TIMER TEST CONNECTIONS
3 PHASE, 4 WIRE
VOLTAGE SOURCE
PHASE SEQUENCE:
A, B, C
SINGLE PHASE
CURRENT SOURCE
RATED DC POWER
SUPPLY
48, 125, 230 V DC
A25
A9
C10
C11
C12
X
Y
C4
C6
C9
A18
A2
N
I
op
N
VC
VB
VA
VA
VB
VC
+
CASE GROUND
SURGE GROUND
Pro
g
rammable
Contact A1
RELAY
UNDER
TEST
START
STOP
A1
A17
C2
PRECISION TIMER
STOP
START
X and Y are connected
to
p
roduce a
p
hase-to-
p
hase fault. See the
Table below.
Phase
under test
INPUT Y
(terminal
block number)
INPUT X
(terminal
block number)
AB C1 C3
BC C3 C5
CA C5 C1