Connecting Power for 3-phase Motors
1.Be certain the power to the branch you are connecting is off, and locked out, so power cannot be reestablished, accidentally.
2.Connect the ground wires. Thse wires will be either green, or green with a white trace.
3.Connect the remaining three cable wires to the three power wires in the service branch.
4.Reestablish power to the branch.
5.Turn the machine on. The motor should be turning
be turning clockwise. If this is the case, the machine can be considered wired correctly. If the motor is not turning in the correct direction, take the following corrective action:
6.Disconnect power in the branch again and be certain it cannot be accidentally turned on while you correct the wiring.
7.Reverse ANY TWO of the power wires to the machine.
8.Reestablish power in the service branch to the machine.
9.Turn on the machine again. The motor should now be turning in the correct direction.
Figure 12: Schematic diagram for single phase motor with 3-wire cable. Note: this schematic provided for use with older sanders, only. All machines are now shipped with a 4-wire cable whether single phase or 3-phase.
Figure 13: Schematic diagram for single phase motor with 4-wire cable.
Figure 14: Schematic diagram for 3-phase motor.
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