Danfoss Soft Starters
Danfoss soft starters offer a total motor starting solution. Accelerating and decelerating a motor are the two most stressing operations in a motor's working life. Controlled soft starting and stopping of a motor reduce stress on the motor and load, and eliminate electrical surges that can harm motor components. Because they are so effective at gently, yet firmly controlling the starting and stopping sequences of pumps, fans, and compressors, Danfoss soft starters are used in a wide variety of industries from HVAC to water treatment to shipping.
They have motors that are protected in advanced ways. That is to say, they have excellent overload protection and good thermal monitoring, which ensures that the motors will run safely even when various, and sometimes trying, conditions are thrown at them. Danfoss soft starters are also user-friendly; they have interfaces that are at least as easy to use as the motor protection features are effective, which means that you can set them up to work with the specific demands of your application without too much fuss and bother.
Products
More Information about Danfoss Soft Starters
Whether the environment is standard or demanding, Danfoss soft starters reliably perform and provide robust control of motor start/stop sequences. They protect motors from all kinds of electrical disturbances, ensuring that the system will operate smoothly and efficiently. A soft starter from Danfoss is a critical component in any motor-driven system where energy efficiency matters.
FAQs
Do Danfoss soft starters have a reset function and are spare parts available?
Yes, Danfoss soft starters have a reset function and spare parts are available to ensure ongoing maintenance and reliable operation.
Motor Starters, Soft Starters and VFDs
Motor Starters
Motor starters safely start and stop a motor in industrial applications. They are designed with a contactor, overload and circuit protection. They are used when basic motor control is required, where torque on the motor is not a concern and speed control is not needed. The advantages of motor starters include: lower cost, allows for remote operation, allows for monitoring of motor state (with the use of auxiliary contacts) and they are safe and efficient. The disadvantages include: high inrush current that can cause fuses to blow and breakers to trip if the inrush is too high, and the starter will allow a full torque to start the motor which can cause the motor to ramp up to full speed very quickly potentially causing the motor to wear and degrade prematurely.
Soft Starters
Soft starters protect motors from inrush current by gently ramping up the motor to full speed. They provide all of the same functions as a traditional motor starter. The advantages of soft starters include: they are less expensive than a VFD when only startup control is needed, they are a smaller system than a VFD where space is a concern and they prevent unwanted torque upon startup, prolonging the life of the motor. The disadvantages include: they are more expensive than a traditional motor starter and they do not allow for full speed control.
VFDs
Variable Frequency Drives (VFDs) allow for the slow ramp up of a motor during startup and the slowing down of the motor during shutdown. They also allow for full speed control during the entire run cycle of the motor. VFDs provide the same functions as both the traditional motor starters and soft starters. The advantages of VFDs include: full speed control (start, stop and in-between), more custom control and monitoring, energy savings due to efficient motor usage and less wear and tear on the motors. The disadvantages include: they are more expensive and larger than other motor control options and they generate heat that may require fans or AC units.