How to wire a soft starter motor? What is the function of a soft starter motor?

How to connect the soft start motor

Soft start motors generally use star-delta starting method, and the wiring method is as follows:

1. Check the motor parameters: Before wiring the soft start motor, first check the parameters of the motor itself to ensure that its withstand voltage, power level and other parameters meet the requirements of the soft start motor to avoid damage to the motor or soft starter.

2. Wiring sequence: Connect the U, V, and W three-phase power supply to the soft starter's incoming line terminals, and pay attention to the correct connection sequence. Generally speaking, the motor's U phase is connected to L1 of the soft starter, the V phase is connected to L2, and the W phase is connected to L3.

3. Star-delta connection: Connect the output terminals of the soft starter to the corresponding power terminals of the motor. Specifically, the R of the soft starter should be connected to the U phase of the motor, S to the V phase of the motor, and T to the W phase of the motor, and mark them.

4. Grounding wire: Carefully check the wiring diagram of the motor and soft starter, correctly connect the grounding wire to the equipment in time, and do not connect it to the power phase line.

In short, the correct soft start motor wiring method can ensure that the motor can start normally, reduce the current impact of the motor during the startup process, extend the life of the equipment, and improve the reliability of the equipment. However, it is necessary to pay attention to follow the relevant electrical safety regulations, and perform safety work before operating electrical equipment, such as cutting off the relevant power supply and touching the leakage of the equipment.

The role of soft start motor

A soft start motor is a motor that can start relatively smoothly. Compared with traditional motor starting, a soft start motor has the following functions:

1. Reduce the impact of starting: Traditional starting methods may cause large instantaneous current, which may easily cause grid pressure fluctuations and equipment vibration, which will bring huge impact to the equipment. The soft start motor can gradually increase the voltage and current, reduce the impact during the starting process, extend the motor starting time, make the starting action smoother, and protect the equipment or system.

2. Accelerate the start time: The traditional start method needs a certain amount of time to start completely. The soft start motor can start the motor by slowly increasing the voltage, which takes less time and starts faster, thus improving production efficiency.

3. Energy saving: In the traditional starting mode, the motor needs to generate peak current in a short time when starting, and the power consumption is huge. However, the soft start motor can limit the current at starting and realize automatic control to minimize energy consumption.

4. Reduce maintenance costs: In traditional starting methods, the instantaneous impact of starting current will cause great damage to the motor and equipment. However, soft start motors use a variety of protection measures to reduce damage to equipment and reduce the maintenance cost of the motor.

In summary, the main function of the soft start motor is to reduce the impact of the starting process, increase the starting speed, save energy and reduce maintenance costs. Because this type of motor is more stable and reliable, it is widely used in industry, metallurgy, power transmission and transformation and other fields.