Section IV
Multiple Unit Configurations
006-0006452 MPC-1500 Operator Guide
Rev P
26 of 48
03/03/2021 www.synqor.com
Section IV
Multiple Unit Configurations
General Considerations
The MPC supports two different paralleling schemes for the AC output: standard paralleling
and expanded paralleling. With standard paralleling, up to three MPC units can be combined
to function as a single machine. A fault on any one unit will cause the entire system to shut
down. With expanded paralleling, up to 32 MPC units can be combined to form high power
single phase, split-phase and 3-Phase systems. An electronic breaker on the hot AC output wire
provides fault-tolerant, glitch-free operation should one MPC unit fail. This allows users to add
extra MPC units to the system for N+1 redundancy, or more generally N+M redundancy.
Standard vs. expanded paralleling is determined by the “AC Output Neutral Wire” option in
the MPC part number. See the table below. Standard paralleling units cannot be mixed with
redundant parallel units in multi-unit systems.
Ordering Information: Standard Vs. Redundant Parallel
AC Output Neutral Wire option
Example PN
Single Unit (no paralleling)
-G
MPC-1500-S-1U-W1
G
S00-ECE
Standard Parallel
-F
MPC-3000-S-2U-W1
F
S00-ECE
Expanded Parallel
-R
MPC-1500-S-1U-W2
R
S00-ECE
Note: When combining MPC units into the configurations described in this section, each MPC
must internally have the neutral wire of its AC OUTPUT floating, rather than connected to its
chassis. This requires that all the MPC units have the “F” option for standard parallel units and
“R” option for expanded parallel units regarding the AC OUTPUT neutral wire connection. Check
the MPC part numbers to be sure this is the case before ordering.
Wiring Caution
WARNING: LETHAL VOLTAGES MAY BE PRESENT ON MPC AC OUTPUT CONNECTIONS.
ALWAYS REMOVE AND INPUT POWER BEFORE MAKING MULTI-UNIT AC OUTPUT
CONNECTIONS. ALL AC OUTPUT CABLE CONNECTORS MUST BE INSTALLED DURING
OPERATION AS A DISCONNECTED CABLE CONNECTOR MAY HAVE EXPOSED VOLTAGE
PRESENT FROM ANOTHER UNIT IN THE GROUP .
