Polyphase Induction Motors

Figure 1: A typical three phase motor.

                                                     

9 Leads Terminal Wiring Guide for Dual Voltage Star (Wye) Connected AC Induction Motor

It is of utmost importance to firstly understand the internal wiring configuration of a 9 leads AC induction motor before doing the actual wiring connection.  All 9 leads motors are most commonly made for dual voltage application, this means that the motor was manufactured specifically for dual voltage operation which can be connected in either 220 volts or 440 volts configuration.