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Soft Starters

Soft Starters
Soft Starters
A soft starter is a device used to temporarily reduce load and torque during motor startup.

A motor typically draws inrush current up to 10 times higher than their running current during startup, and up to 3 times higher torque. This kind of mechanical stress dramatically reduces the motorís service life, and the large power draw can propagate to other equipment in the system. Soft starters are designed to eliminate these undesired side effects of motor startup.

Soft starters reduce starting torque by temporarily reducing voltage or current input, allowing the motor to accelerate smoothly. Soft starters are also able to control motor deceleration, reverse motor direction, and provide overload protection. They are an ideal alternative to drives where a more cost-effective, simple solution is required.

PSR Series Image
  • 208~600VAC Input
  • Up to 46.2 Normal Duty Amps
  • Up to 15 HP @ 230V
  • Up to 30 HP @ 460V
  • UL; cUL; CE Approvals
The PSR Sofstarter is compact and easily accessible for installation in places where space is limited. This series covers motor currents from 3 to 45 A. Further, the system concept includes MMS and the softstarters are available for remote control connection using the FieldBusPlug as an accessory. All sizes include a Run signal relay. With standard performance the PSR Softstarters handle ten starts per hour.
  • Open Type
  • Prepared for Fieldbus Communication
PSE Series Image
  • Wide Rated Operational Voltage 208 ~ 600 VAC
  • Wide Rated Control Supply Voltage 100 ~ 250 VAC
  • Coated Circuit Boards for Reliable Operation in Harsh Environment
  • Optional External Keypad, IP66
  • Torque Control for Excellent Control of Pumps
The PSE soft starter is the world's first compact soft starter with both built-in electronic overload for motor protection and torque control for an excellent control of pumps. The compact design with the most important functionality integrated provides a very efficient starting solution. The illuminated language neutral display and the four button keypad make it easy to take advantage of all the advanced functionality in the soft starter. The display will also provide all the necessary information both during ramping and continuous operation.
  • Motor Underload Protection to Detect Pumps Running Dry
  • Locked Rotor Protection, Detecting Jammed Pumps
  • Kick Start to Start Jammed Pumps or Conveyor Belts
S801+ Series Image
  • Adjustable torque control
  • Built-in overload protection
  • Adjustable kick start control
  • Built-in run bypass contactor
  • Programmable overload settings, 31Ė100% (3.2:1) of rated current for the unit
Eatonís S801+ line of reduced voltage soft starters is very compact, multifunctional, easy to install and easy to program. Designed to control acceleration and deceleration of three-phase motors, the line is available for current ranges from 11A all the way through 1000A applications, and is suitable for mounting in motor control centers or in enclosed control.
PST Series Image
  • 208~600 or 690VAC Input
  • Up to 1062 Normal Duty Amps
  • Up to 450 HP @ 230V
  • Up to 900 HP @ 460V
  • UL Approvals
The PST range is a microprocessor-based softstarter designed with the latest technology for soft start and soft stop of motors. The PST Softstarter has several advanced motor protection features as standard. The four-button keypad and the logic structure of the menu make the installation, commissioning and operation easy. The PST Softstarter can be used with or without a by-pass contactor. The larger sized models include a built-in bypass contactor. The PST Softstarter can be selected according to the rated motor power in normal duty applications like pumps, compressors, elevators, escalators, short conveyor belts and bow thrusters.
  • Open Type
  • Built-In Bypass Contactor
  • Prepared for Fieldbus Communication
SSW05 Series Image
  • 220~460 VAC Input
  • Up to 85 Normal Duty Amps
  • Up to 30 HP @230V
  • Up to 60 HP @460V
  • UL; cUL; CE Approvals
The WEG SSW05 soft starter is a super compact, fully digital soft starter with a state of the art DSP controller. Its digital construction provides optimum operation, diagnostics capability, and full motor protection. Simplicity in set-up and operation is assured since all parameters and set up selections are made via dip switches and potentiometers. Status LEDs alert the user of the operational status of the SSW05. Simplicity, ease of set up, and the micro size assures quick and easy installation and operation.
  • Built-In Bypass Contacts
  • Built-In Overload Protection
  • DIN Rail Mounting
SSW07 Series Image
  • 220~575 VAC Input
  • Up to 1400 Normal Duty Amps
  • Up to 550 HP @ 230V
  • Up to 1200 HP @ 460V
  • UL; cUL; CE
Soft starters are static starting switches, designed for the acceleration, deceleration and protection of the three phase, electric induction motor through the control of the voltage applied to the motor. The SSW07, with DSP control (Digital Signal Processor), was designed to provide great performance at motor starts and stops with excellent cost-benefit relation. Easy to set up, it simplifies start up activities and daily operation. The SSW07 is compact, contributing to optimized space in electric panels. The SSW07 incorporates all electric motor protection and adapts to customer needs through its easy to install optional accessories. Thus, a keypad, a communication interface, or a motor PTC input can be added to the product.
  • Built-In Bypass Contacter
  • Built-In Overload Protection
  • Built-In Electronic Thermal Relay
S801 Series Image
  • 200~600 or 200~690VAC Input
  • Up to 1000 Normal Duty Amps
  • Up to 400 HP @ 230V
  • Up to 800 HP @ 460V
  • UL; CSA; CE Approvals
The S801 Soft Starter is designed to be the smallest, most compact soft starter in the market today. With this small size, it can easily fit in place of existing soft starter designs, wye-delta starters or across the-line NEMA and IEC starters. This feature allows easy retrofits of existing Motor Control Centers or Enclosures and saves the expense of replacing existing structure or adding a new one to house a soft starter. The product is designed to work with 3-phase motors in a Delta (3-lead) configuration.
  • Open Type
  • Built-In Bypass Contactor
  • Built-In Overload Protection
  • Pump Control Options
  • Adjustable Ramp Times
  • Adjustable Torque Control
DS6 Series Image
  • Smallest Soft Start Controller in its Performance Class
  • Run Bypass Mode Greatly Reduces the Internal Heating Created by the Power Dissipation Across the SCRs
  • LED Displays Device Status and Provides Fault Indication
  • Variable Ramp Times and voltage Control (Torque Control) Settings Provide Unlimited Starting Configurations, Allowing for Maximum Application Flexibility
  • Soft Stop Control Suits Applications where an Abrupt Stop of the Load is Not Acceptable
With a focus on small size and ease of installation, Eaton's DS6 line of reduced voltage solid-state soft start controllers is designed to meet your needs for reliable and efficient soft starting. Designed to control the acceleration and deceleration of three-phase motors, the DS6 Series is available for current ranges from 40 to 180 amps.
  • Soft Acceleration and Deceleration Reduces Wear on Belts, Gears, Chains, Clutches, Shafts and Bearings
  • Minimizes the Peak Inrush Current's Stress on the Power System
  • Minimizes Peak Starting Torque to Diminish Mechanical System Wear and Damage
  • 24 Vdc Control Module Enhances Personnel and Equipment Safety
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