9 Leads Terminal Wiring Guide for Dual Voltage Delta Connected AC Induction Motor

As mentioned in our previous article, another variation of the 9 leads AC induction motor aside from the star (wye) configuration is the delta configuration. It is important to take extra precautionary measure to determine first as to which type of internal coil winding the 9 leads motor is configured before attempting any wiring connection and installing power to run the 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.

Internal Wiring Configuration for Dual Voltage Dual Rotation Single Phase Capacitor Start AC Motor

Wiring a 110 or 220 volts split phase capacitor start AC motor to achieve a dual voltage 110 and 220 volts connection and to be able to run the motor in both forward and reverse direction can be achieved by knowing the order and arrangement of its internal coil winding connection and its associated internal electrical components.

Running a Three Phase AC Induction Motor on Single Phase Supply Source Voltage

In some strange occurrences, you may sometimes end up in certain emergency cases where you are caught unexpectedly in urgent situations that would demand immediate action. One of such unexpected situation in the field of industrial technology is the absence of three phase power source to supply a three phase motor, where the only available means is the most commonly found single phase power supply voltage.

Why does a 3 phase AC induction motor have to be connected in star delta (or wye delta) configuration - What is the significance and advantage of using star and delta in motor connection

Three phase AC induction motors are known to have a very high start-up surge current. The most practical approach to reduce the high start-up inrush current is by firstly implementing a star (or wye) configuration to the motor's 6 leads wiring terminal during the start-up run of the motor. When the motor slowly picks up speed and a significant decrease in the amount of current is achieved then the motor's 6 leads wiring terminal is then reconfigured to a delta connection.