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Asynchronous induction motors with a squirrel cage winding have traditionally had issues with safe starting. Although "soft start" methods have long been theoretically developed, in practice, starting the motor without overload has been quite difficult until recently. However, the situation has changed recently due to the emergence of soft starters.
Why are Soft Starters Needed?
These devices are designed to ensure a smooth start for asynchronous motors and elements directly associated with the motor shaft. During a standard motor start, an excessive current is supplied, which negatively impacts its operation. This leads to voltage drops that can cause winding burnouts, wear, and other issues. Standard starting can also lead to dips in the network that cause discomfort and disrupt the stability of other electrical devices.
Altistart 22 Device
One effective solution for soft starting and braking of motors is the Altistart 22, developed by Schneider Electric. This device allows for a soft start and gradual braking of motors. The Altistart 22 features a bypass that significantly reduces the thermal loss of the device. Additionally, it has a built-in terminal window that allows all necessary parameters to be configured according to the user's requirements.
Areas of Application for the Device
Soft start devices, such as the Altistart 22, are often used in construction, infrastructure projects, and industry to provide smooth start and braking of electric motors. It is best suited for controlling:
- Fans
- Conveyors
- Pumps
- Compressors
Examples of Device Applications
The Altistart 22 can be installed on:
- Centrifugal Pump: controls braking and phase discrepancies.
- Piston Pump: regulates the proper distribution of phases.
- Turbine: reduces the destructiveness of the braking torque through softer braking.
- Conveyor: helps control the operation of the conveyor and shuts off the motor in case of overload.
Advantages of Altistart 22
Why is Altistart 22 better than its competitors? This soft starter operates with three-phase power and has a built-in bypass. The motor power determines the power rating of the device, making it easy to connect the electric motor to the Altistart 22.
- Reduction of load on the grid: Standard starting causes dips in the network, while the Altistart 22 prevents current spikes and voltage drops.
- Reduction of operating costs: The device reduces mechanical stress on the motor, extending its lifespan and decreasing maintenance needs.
The Altistart 22 also allows for current limiting, configuring it according to motor requirements, and setting the stopping tempo of electrical devices.