GE Industrial Solutions MX350 Instruction manual - 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