The Motor Starting Autotransformer is used to reduce the inrush current of electric motors, ensuring greater system protection and preventing voltage drops in the network. It is a robust and efficient solution, recommended for industrial applications that require safe, reliable starts with minimal electrical impact.
Technical Features
- Manufactured in standardized power ratings from 5 to 500 hp, with models above this range available upon request.
- Designed for common voltages of 220 V, 380 V, and 440 V, providing versatility for different industrial applications.
- Equipped with taps at 65% and 80% of nominal voltage, and available in thermal classes B (130 °C), F (155 °C), and H (180 °C), ensuring safety and durability under various operating conditions.
- Adjustable starting time options of 2, 5, 10, 15, 30, or 45 seconds, according to process requirements.
- Windings manufactured in aluminum or copper, with natural air cooling system (AN), ensuring reliable and efficient performance.
- Insulation class: 1.1 kV. Standard protection degree: IP00 (other configurations available upon request).
- Designed to operate at altitudes up to 1000 meters above sea level and ambient temperatures up to 40 °C.
- Custom designs available according to client specifications and project requirements.
Applications
Starting Autotransformers are used in motors operated by compensator starters, with the main function of reducing current peaks during startup.
This feature prevents significant voltage drops in the electrical network.
The process occurs through the connection of the autotransformer in series with the compensator switch, supplying the motor with a reduced voltage in its windings. After the motor accelerates, the supply automatically returns to nominal voltage, ensuring greater safety and system efficiency.