12 Lead Motor Star Delta Wiring Diagram: A Comprehensive Guide

Electric motors are an essential component of most machinery used in various industries. These motors are expected to run smoothly and continuously, but they require regular maintenance to keep them functioning properly. One of the most common types of electric motors used in industrial applications is the 12 lead motor. In this article, we will discuss the 12 lead motor star delta wiring diagram in detail to help you understand this type of motor and how it works.

What is a 12 Lead Motor?

A 12 lead motor is a type of three-phase motor that has 12 different connections or leads that can be connected to the power supply in various ways. These connections provide flexibility in the wiring of the motor, enabling it to operate at different voltages and speeds. The 12 lead motor is commonly used in applications where a high torque is required, such as compressors, conveyors, and pumps.

The 12 lead motor has six terminals on each end of the winding. These terminals are grouped in sets of three, with each set corresponding to a particular winding within the motor. The sets of terminals are labeled T1, T2, T3, T4, T5, and T6, respectively.

What is Star Delta Wiring Diagram?

The star delta wiring diagram is a type of motor connection that allows a three-phase motor to start and run smoothly. In this wiring diagram, the motor is connected in a star configuration during the starting phase and then switched to a delta configuration during the running phase. The star delta wiring diagram is also known as the wye-delta starter or the Y-Δ starter.

When the motor is connected in star configuration, the voltage applied to each winding is reduced to one-third of the full voltage. This helps reduce the starting current and torque, which is essential to prevent the motor from overheating or tripping the circuit breaker. Once the motor reaches its maximum speed, the contactor switches the configuration to delta, which increases the voltage applied to the motor’s windings to full voltage.

12 Lead Motor Star Delta Wiring Diagram

The 12 lead motor can be wired in a star delta configuration to achieve different speed and torque levels. The star delta wiring diagram for the 12 lead motor is shown below:

Terminal Star Connection Delta Connection
T1 L1 T1 – T6 connected
T2 L2 T2 – T4 – T5 connected
T3 L3 T3 – T5 – T6 connected
T4 L1 T2 – T4 – T5 connected
T5 L2 T3 – T5 – T6 connected
T6 L3 T1 – T6 connected

The star delta wiring diagram above shows how the 12 lead motor’s terminals are connected for both star and delta configurations. When the motor is connected in star configuration, terminals T1, T2, and T3 are connected to the power supply, while terminals T4, T5, and T6 are connected together. When the motor is connected in delta configuration, terminals T1, T4, and T6 are connected to the power supply, while terminals T2, T3, and T5 are connected together.

FAQ

1. What is a 12 lead motor?

A 12 lead motor is a type of three-phase motor that has 12 different connections or leads that can be connected to the power supply in various ways. These connections provide flexibility in the wiring of the motor, enabling it to operate at different voltages and speeds.

2. What is a star delta wiring diagram?

The star delta wiring diagram is a type of motor connection that allows a three-phase motor to start and run smoothly. In this wiring diagram, the motor is connected in a star configuration during the starting phase and then switched to a delta configuration during the running phase.

3. Why is the star delta wiring diagram important?

The star delta wiring diagram is important because it helps reduce the starting current and torque of the motor, which is essential to prevent the motor from overheating or tripping the circuit breaker. It also enables the motor to operate at different speeds and torque levels.

4. What are the benefits of using a 12 lead motor?

The benefits of using a 12 lead motor include its ability to operate at different voltages and speeds, its high torque capacity, and its versatility in various industrial applications.

5. What are the common applications of a 12 lead motor?

The common applications of a 12 lead motor include compressors, conveyors, pumps, and other applications where a high torque is required.

Conclusion

The 12 lead motor star delta wiring diagram is an essential component of most industrial applications that use three-phase motors. It provides flexibility in the wiring of the motor, enabling it to operate at different voltages and speeds. By understanding how the 12 lead motor is wired in star delta configuration, you can ensure that your motor operates smoothly and efficiently. Use the information provided in this article to help you understand the 12 lead motor star delta wiring diagram and its importance in industrial applications.