Hi everyone,

ABB softstarters are designed to provide smooth motor starting and stopping, reduce mechanical stress, and increase the longevity and reliability of motors. The key models in the ABB softstarter range include the PSR, PSE, and PSTX series. Here’s a detailed look at each series, their features, and applications based on the provided documents:

PSR Series - The Compact Range

- Features:
- Two-phase controlled
- Operational voltage: 208-600 V AC
- Rated operational current: 3-105 A
- Soft start and stop with voltage ramp
- Built-in bypass for energy saving and easy installation
- Easy set-up with three potentiometers
- Compact design ideal for limited spaces
- LED indicators for On/Ready and Run/Top of ramp

- Applications:
- Bow thruster
- Centrifugal pump
- Compressor
- Short conveyor belt
- Elevator
- Small to medium-sized motors

PSE Series - The Efficient Range

- Features:
- Two-phase controlled
- Operational voltage: 208-600 V AC
- Rated operational current: 18-370 A
- Soft start/stop with voltage ramp and torque control
- Built-in bypass for energy saving and easy installation
- Illuminated and language-neutral display for easy set-up
- External keypad rated IP66 (optional)
- Fieldbus communication options
- Motor protection features including overload and underload protection, locked rotor protection, and current limit

- Applications:
- Centrifugal pumps
- Compressors
- Fans
- Conveyors
- Crushers
- Mills
- Mixers

PSTX Series - The Advanced Range

- Features:
- Three-phase controlled
- Operational voltage: 208-690 V AC
- Rated operational current: 30-1250 A
- Advanced motor protection including overload, underload, overvoltage/undervoltage, phase reversal, and earth-fault protection
- Built-in bypass for energy saving and fast installation
- Detachable keypad with IP66 rating for front door mounting
- Extensive functionality including torque control, pump cleaning, motor brake, limp mode, dynamic braking, and sequence start
- Multiple start and stop ramps, current limit ramp, dual current limit
- Analog output and fieldbus communication built-in

- Applications:
- Heavy-duty applications
- Advanced motor control requirements
- High reliability and uptime demands

Evolution of ABB Softstarters

ABB softstarters have evolved significantly over the years to meet the increasing demands for more advanced motor control and protection. The evolution can be summarized as follows:

- Early Models: Basic softstarters with simple start/stop functions and minimal protection.
- PSR Series: Introduced compact, easy-to-install solutions suitable for small to medium-sized motors, focusing on space-saving and basic protection.
- PSE Series: Brought more advanced features like torque control, illuminated displays, and extensive motor protection, catering to more demanding applications like pumps and compressors.
- PSTX Series: The latest and most advanced range, offering comprehensive motor protection, advanced control features, and high flexibility for a wide range of applications, including heavy-duty industrial uses.

Common Applications and Benefits

- Pumps: Eliminates water hammering, prevents clogging, and avoids running dry with underload protection.
- Fans: Soft starting and stopping reduces current peaks and wear, and features like dynamic braking improve operational control.
- Compressors: Provides full control of starting currents and prevents motor damage due to phase reversal.
- Conveyors: Overload protection prevents overheating, and jog with slow speed improves positioning and control.
- General Industrial Use: Reduces mechanical and electrical stress, increases motor life, and enhances overall system reliability.

Installation and Configuration

- PSR Series: Simple set-up with three potentiometers for start/stop time and initial voltage, built-in bypass, and compact design for easy installation.
- PSE Series: Features an illuminated display for easy configuration, built-in bypass, and remote operation options with external keypad and fieldbus communication.
- PSTX Series: Advanced set-up with a detachable keypad, multiple ramp options, built-in bypass, and extensive diagnostic and protection features.

For more detailed technical specifications, installation guides, and configuration options, refer to the provided catalog and technical documentation. These documents offer comprehensive information on the operational parameters, configuration settings, and application-specific recommendations for each softstarter series.