Section IV
Multiple Unit Configurations
006-0006452 MPC-1500 Operator Guide
Rev P
32 of 48
03/03/2021 www.synqor.com
Series Split Phase Connection of AC OUTPUTS
Two MPC units can have their AC OUTPUTS connected in series to create an output voltage that
is twice that of the output voltage of the individual MPC units. For instance, if the MPC units each
create an 115Vac output, the series configuration will create a 230Vac output at twice the power
level of a single unit. Or, if the MPC units each create a 230Vac output, the series configuration
will create a 460Vac output at twice the power level of a single unit.
The center node between the two outputs in the series configuration should be considered the
“neutral” wire, and therefore kept at a potential close to Protective Earth Ground (PEGND).
The other two AC OUTPUT wires (one from each MPC unit) are electrically “hot” (meaning at
a high potential relative to the neutral or PEGND). One will be phase- shifted by 180 degrees
(one-half cycle) from the other, meaning that when one hot wire is at its positive peak the other
is at its negative peak, and vice versa. The voltage between these two hot wires is therefore
twice that of either hot wire compared to the neutral wire. This configuration is called “Split
Phase”. When ordering, select the “F: Floating” option for MPC units configured in this manner.
Contact the SynQor factory for N+1 redundant Split Phase systems.
The wiring diagram for the AC OUTPUT cables and the CONFIGURATION cable for the Split Phase
configuration is shown below:
AC OUTPUT
AC OUTPUT
REAR PANEL
REAR PANEL
L2 L1
N
TO LOAD
PEGND
Line 2
Line 1
L2
N
PEGND
L1
N
PEGND
CONFIGURATION cable SYN-9313
If the user is providing the AC OUTPUT cable, all the cable sections should have the following
minimum wire size, depending on whether the AC OUTPUT of the individual MPC units is 115
Vac or 230 Vac.
MPC AC Output Voltage
Cable Minimum Wire Size
115 Vac
#14 AWG (2.5 mm
2
)
230 Vac
#16 AWG (1.5 mm
2
)