Okay, let's break down RPC rotation and how to correct it.

Understanding RPC Rotation RPC Output

An RPC (Rotary Phase Converter) takes single-phase power and creates a simulated third phase. This "derived" phase is not identical to the two original phases, but it's close enough to run three-phase motors.

Motor Rotation

The direction a three-phase motor rotates depends on the sequence of the phases (A-B-C or A-C-B).

Troubleshooting Rotation1. Identify the Incoming Legs

Clearly mark your incoming single-phase legs (let's call them L1 and L2) and the derived phase (T3).2.

Motor Rotation is Incorrect

Confirm that your motor is rotating in the wrong direction.

Solutions The Correct Method

Swap two of the three legs at the motor. It doesn't matter which two.

Swapping the two single-phase legs

This will not change the rotation, since the generated leg is still in the same position in relation to the 2 single phase legs.

Swapping the single phase leg with the derived leg

This method is NOT recommended. The two single phase legs are what the generated leg is derived from, so you could easily cause damage to the RPC if you send one of the single phase legs back through the RPC.

Important Safety Notes Disconnect Power

ALWAYS disconnect power to the RPC and motor before making any wiring changes.

Qualified Electrician

If you are not comfortable working with electrical wiring, consult a qualified electrician. Incorrect wiring can be dangerous and damage equipment.

Check Voltage

Verify that the voltages are correct after making any changes.*

Lockout/Tagout

Follow proper lockout/tagout procedures to ensure the circuit remains de-energized while you are working on it.

In Summary: The most reliable and safest method is to swap two of the three legs at the motor. Flag for review