Phase voltage inputs (io_b module), Load, Chapter 2: installation electrical installation – GE Industrial Solutions MX350 Instruction manual User Manual
Page 27

CHAPTER 2: INSTALLATION
ELECTRICAL INSTALLATION
MX350 AUTOMATIC TRANSFER CONTROL SYSTEM – INSTRUCTION MANUAL
2–11
Phase voltage inputs
(IO_B module)
The MX350 has three channels for AC voltage inputs. There are no internal fuses or ground
connections on the voltage inputs. Polarity is critical for correct power measurement and
voltage phase reversal operation.
Figure 12: Wye voltage connection
Figure 13: Delta voltage connection
A
C
B
–
+
D1
D2
D4
D3
Phase voltage inputs
Auto Transfer Control
D5
D6
D7
VT1
VT2
VT3
Control power
L
N
D8
N/C
–
+
C1
C2
C4
C3
Phase voltage inputs
Auto Transfer Control
889735A1.CDR
C5
C6
C7
VT1
VT2
VT3
Control power
L
N
C8
N/C
N
Typically
generator
Typically
utility
LOAD
A
C
B
–
+
D1
D2
D4
D3
Phase voltage inputs
Auto Transfer Control
D5
D6
VT1
VT2
VT3
Control power
L
N
D7
D8
N/C
–
+
C1
C2
C4
C3
Phase voltage inputs
Auto Transfer Control
889736A1.CDR
C5
C6
VT1
VT2
VT3
Control power
L
N
C7
C8
N/C
From
Source 2
(generator)
From
Source 1
(utility)
LOAD
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