BECKWITH ELECTRIC M-4272, Instruction Book

Page: 144 / 217

System Setup and Setpoints – 4
4–33
Figure 4-32 Single-Phase Source Side, Phase-Phase, Three-Phase Bus Side Open Delta Three-
Line Connection Diagram
A
B
C
MOTOR
MOTOR
52S1 52S2
A
B
C
A B C A B C
SOURCE 1 (S1) SOURCE 2(S2)
97 96
I
S1
99 98
I
S2
1
1
M-4272 M-4272
STATION BUS SYSTEM
1 CT-S1 and CT-S2 are single phase CTs. They both must be connected to the same phase,
either Phase A, Phase B or Phase C.
VT-S2 One VT
Phase-Phase
Connection
2
VT-S1 One VT
Phase-Phase
Connection
2
2 VT-S1 and VT-S2 are single phase VTs. They both must be connected to the same
phase, either Phase A-To-Phase B, Phase B-To-Phase C or Phase A-To -Phase C.
VT-B Two VT Open-Delta Connection
CT-S1 Single Phase CT CT-M2 Single Phase CT
95 93 91
M-4272
V
AB
V
BC
V
CA
90 92 94
83
81
79
M-4272
V
AB
V
BC
V
CA
78
80
82
89
87
85
M-4272
V
AB
V
BC
V
CA
84
86
88