To make sure that a low voltage soft starter works reliably, it must be installed correctly. If you prepare and install it correctly, the process can be simple and quick. This article gives you a step-by-step guidance on how to properly install a low voltage soft starter for use in industry.
Step 1: Preparation
Before you begin the installation, you must collect all the tools and materials you will need. You will need a screwdriver, wire strippers, pliers, a voltmeter, and of course, the low voltage soft starter. Also, make sure you have the installation guide for the model you are using. This guidebook will give you step-by-step directions and pictures to help you along the way.
Also, make sure that the power to the area where you will be putting in the soft starter is off. This will keep any electrical problems from happening while the installation is going on. You can move on to the following step once the power is off.
Step 2: Mounting the Soft Starter
The first thing you need to do to install the soft starter is to mount it. Pick a good spot for the soft starter that gets good air flow and is away from heat and dampness. You should use the mounting holes on the soft starter to attach it to a flat, strong surface. Use the right screws and washers to hold the soft starter in place.
When you put the soft starter on, make sure you pay attention to which way it is facing. The soft starter should be put in an upright position, with the front panel facing the front. This will make it easy to go to the display and controls.
Step 3: Connecting the Power Supply
Once the soft starter is mounted, you can start connecting the power supply. The power supply connection is a critical step, as it provides the electrical energy needed for the soft starter to function.
First, identify the input terminals on the soft starter. These terminals are usually labeled as L1, L2, and L3 for the three-phase power supply. Use the wire strippers to remove the insulation from the power supply wires, and then connect them to the corresponding input terminals on the soft starter. Make sure the connections are tight and secure to prevent any loose connections that could cause electrical problems.
After connecting the power supply, use a multimeter to check the voltage at the input terminals. This will ensure that the power supply is providing the correct voltage to the soft starter.
Step 4: Connecting the Motor
Once the soft starter has been securely mounted, the next step is to connect the power supply. This is a key stage in the installation process, as the soft starter depends on a stable power supply for proper operation.
Start by locating the input terminals on the soft starter. These are typically marked L1, L2, and L3, which are used for the three-phase power connection.Next, use wire strippers to remove the insulation from the power cables, then connect each wire to the corresponding input terminal on the soft starter. Make sure every connection is tight and secure, as loose or poor contact may lead to electrical faults during operation.
Once the power supply has been connected, use a multimeter to check the voltage at the input terminals. This step helps verify that the soft starter is receiving the correct supply voltage.
Step 5: Control Circuit Connection
The soft starter's functionality is controlled by the control circuit. It has parts like start and stop buttons, overload relays, and other controls.To connect the control circuit, you need to find the control terminals on the soft starter. Most of the time, these terminals include labels that tell you what they do. Following the wiring schematic in the installation manual, connect the control wires to the right terminals.
Use the right wire gauge for the control circuit to make sure that electricity flows through it correctly. Check all the connections again to make sure they are tight.


Step 6: Programming the Soft Starter
Once all the physical connections are made, it is time to program the soft starter. The programming process will vary depending on the model of the soft starter you are using. However, most soft starters come with a built-in display and programming interface that allows you to set various parameters such as starting time, stopping time, and current limit.
Refer to the installation manual for detailed instructions on how to program the soft starter. Make sure to set the parameters according to the requirements of your application.
Step 7: Testing the Installation
After programming the soft starter, it is important to test the installation to ensure that everything is working correctly. Before turning on the power, double-check all the connections and make sure there are no loose wires or other potential hazards.
Once you are confident that everything is in order, turn on the power supply to the soft starter. The soft starter should start up and display the appropriate status information on the display.
Next, test the start and stop functions of the soft starter using the control buttons. The motor should start and stop smoothly without any issues. If you encounter any problems during the testing process, refer to the troubleshooting section of the installation manual or contact our technical support team for assistance.
Step 8: Safety Precautions
Throughout the installation process, it is important to follow all safety precautions to prevent any electrical accidents. Always wear appropriate personal protective equipment (PPE) such as safety glasses and gloves. The parameters should be configured according to the requirements of your application. For more complex installation requirements, professional technical support may be required. Our team is available to provide installation guidance and application support when needed.
Conclusion
If you are looking for a low-voltage soft starter that offers stable performance and reliable quality, Renle offers a variety of product solutions to meet the needs of different applications. Our 22kW soft starter, in particular, is known for its stability and efficiency, making it a popular choice among many customers. We also offer products such as AC Soft Start Devices and Solid State Soft Starters, which can be tailored to various operating conditions and usage requirements.
