How To Connect 3 Phase Electric Motor
We all are aware of the advantages and diverse applications of three-phase motors in the professional industry. But do you know industries consume more than 52% of the power generated, and induction motors consume about 60% of the power used in industries?
This concludes that three-phase motors are well-known for their high efficiency, functionality, and durability. These motors operate on three-phase main supply and convert electrical energy into mechanical power.
However, connecting 3 phase motor accurately could be a daunting task for a beginner. So, if you are considering buying a 3-phase motor for your industrial operation, you must find out how to connect 3 phase electric motor.
In this guide, we will help you understand the three-phase motor connection. You will also learn how to test the motor after connection to ensure efficient and precise working. Let’s dive deep into it.
How to connect 3 phase electric motor in star and delta connection?
Before we jump into establishing the connection of a three-phase motor, you must analyze the connection configuration. A three-phase motor usually has two types of connections; star and delta.
Figure 1: Star connection for 3-phase electric motor
It is one of the most common types of motor connection used for different industrial applications to ensure smooth and reliable performance. In this specific type, the motor lead wires are connected in such a way that it creates a star or “Y” shape.
To maintain a star connection, you can either connect the start or finish ends of three windings together. Connect the ends of coils T4, T5, and T6 at a common point and leave the starting wires as leads.
In another way, connect the beginning winding T1, T2, and T3 at a common point called “neutral,” keeping the end wires for leads.
Figure 2: Delta connection for 3-phase electric motor
Delta connection is maintained by connecting the end of the first winding to the start of the second winding, connecting the end of the second winding to the start of the third winding, and finally, connecting the end of the third winding to the start of the first winding. It will appear similar to the delta ∆ (Greek letter).
Connect the terminals with three phases as follows;
- Connect phase A (T4) to the start of phase B (T2).
- Connect phase B (T5) to the start of phase C (T3).
- Now, connect the end of phase C (T6) to the beginning of phase A (T1).
You must understand that each phase is connected to two adjacent phases in the delta connection, making a closed circuit. Therefore, the line voltage and phase voltage are always the same in this connection type.
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How to connect 3 phase electric motor accurately?
Are you wondering how to connect 3 phase electric motor that works precisely without failure? Follow these 5 easy steps to ensure your connection is safe and operates efficiently;
- Analyze the phase configuration, voltage rating, and current rating.
- Determine the leads of three phases: U, V, and W or T1, T2, and T3.
- Connect the leads to the terminal box of the motor.
- Check if you have connected wires accurately.
- Now, connect the motor to the 3-phase power supply and perform routine motor testing to ensure the motor is running without faults.
Related Guide: How To Test A Three Phase Electric Motor (Easy Guide)
If you were confused about how to connect 3 phase electric motor correctly, we hope you have found your answer. With two types of connection and an accurate method, your three-phase motor can work reliably without any malfunction.
Xinnuo Motor is the leading electric motor manufacturer that delivers high-quality, functional three-phase electric motors. We manufacture motors with 100% stainless steel and a copper coil. We have a diverse range of motors, including Single-phase electric motors, OEM motors, and Explosion-proof motors.
For further assistance, feel free to contact us.