3-Phase Synchronization and Signal Wiring
3-Phase Synchronization and Signal Wiring
L1
L2 1 2 3 4 5 6 7
Figure 2-103-Phase Sync Connection
Refer to Table 2-2 for the signal pinouts.
To achieve proper three-phase output, units configured for each phase need to be wired to the appropriate phase. Extra care should be exercised when multiple paralleled units are also wired for 3-phase operation. In this case it is advisable to group all parallel inverters belonging to the same phase together in a rack.
•First ensure power to the rack has been disconnected. Make connections to the CAN/SYNC connector using its screw-type wire clamps. It may be necessary to remove the mating connector to facilitate connections to the terminal.
•Twisted bundles of four multi-colored wires should be used for easier identification.
•Start with unit in Phase-1, wire from “SYNC-OUT 0” in this phase to “SYNC-OUT 120” of Phase-2 and “SYNC-OUT 240” of Phase-3.
•Next, Connect a different color wire from “SYNC-OUT 120” of Phase-1 to “SYNC-OUT 240” of phase-2 and “SYNC-OUT 0” of Phase-3.
•Connect a different color wire from “SYNC-OUT 240” of Phase-1 to “SYNC-OUT 0” of phase-2 and “SYNC-OUT 120” of Phase-3.
•Lastly, connect all “RETURN” lines together.
•See section on “Parallel Operation” on page 2–15 to connect additional units to each phase.
