ABB PSTX105-600-70 Soft Starter

1. Product Overview

The ABB PSTX105-600-70 is a high-performance soft starter designed to reduce inrush current and mechanical stress during motor startup, providing smooth start and stop control with built-in protection functions. It is suitable for pumps, fans, compressors, conveyors, and various industrial machinery, improving energy efficiency, extending equipment life, and enabling remote monitoring via controllers.

2. Main Technical Specifications (Typical)

• Model: PSTX105-600-70

• Type: Three-phase AC soft starter

• Rated Current: 105 A

• Rated Voltage: 3 × 380–690 V AC

• Rated Power: Approx. 55–90 kW (depending on voltage and load)

• Start Current Limitation: Adjustable, up to 600 A

• Start/Stop Mode: Voltage ramp soft start / stop

• Control: Analog/Digital control, supports remote control

• Digital Inputs/Outputs: Multiple DI/DO

• Analog Inputs/Outputs: Multiple AI/AO

• Communication Interface: Modbus RTU / TCP, optional PROFIBUS/PROFINET

• Mounting: Panel or base mounting

• Ambient Temperature: -20 ℃ to +60 ℃

• Protection Class: IP20 (standard)

• Dimensions: Dependent on device model

3. Advantages and Features

• Smooth Start and Stop
  Reduces mechanical and current shocks, extending motor and equipment life.

• High Reliability and Protection
  Built-in overload, under/overvoltage, phase sequence, and jam protection.

• Energy Saving
  Limits starting current to reduce system load and energy consumption.

• Flexible Control and Communication
  Supports multiple communication protocols for remote monitoring, diagnostics, and control.

• Compact Design and Easy Installation
  Saves control panel space, easy to maintain and expand.

4. Applications

• Pumps, fans, and compressors

• Conveyor and industrial machinery start control

• HVAC and ventilation systems

• Petrochemical, chemical, and large industrial production lines

• Motor start protection in power and distribution systems

• Renewable energy equipment (wind, water pumps)

5. Precautions for Installation and Use

• Verify soft starter rated voltage and current match the motor

• Install in dry, ventilated environments, avoiding high temperature or corrosive conditions

• Ensure terminal connections are tight to prevent poor contact

• Disconnect power before configuring start/stop parameters

• Periodically check soft starter operation and heat dissipation

• Installation and maintenance should be performed by qualified personnel

The structure and details of the product：

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