A Motor Starting reactor is used in electrical systems to limit the high inrush current that occurs when starting large electric motors. When an electric motor starts, it initially draws a high current due to the low resistance and impedance of the motor windings. This inrush current can be several times higher than the motor’s normal operating current approximately 7-10 times.
Reactors > Special Application Reactor
Motor Starting Reactors
The Motor Starting reactor is installed in series with the motor during the starting process. Its primary function is to limit the rate of rise of current and control the inrush current, preventing damage to the motor windings and other connected equipment. By introducing impedance into the circuit, the reactor helps to reduce the impact of the high starting current.
Key features and functions of a motor-starting reactor include:
- Impedance Control: The reactor provides a controlled level of impedance to the circuit during motor startup, limiting the current surge.
- Voltage Drop: The reactor may cause a slight voltage drop during the starting process, but it is typically designed to be within acceptable limits.
- Time Delay: Some motor starting reactors may have a time delay feature to provide a gradual increase in current, reducing the mechanical stress on the motor and associated equipment.
- Protection: The reactor helps protect the motor from damage that could result from excessive inrush current.
ˇMotor Starting reactors are commonly used in industrial applications where large motors are employed, such as in pumps, compressors, and other heavy machinery. The use of these reactors is part of good engineering practice to ensure the reliable and safe operation of electrical systems.
