ABB PSTB1050-600-70 1050A Soft Starter

The ABB PSTB1050-600-70 is a high-performance heavy-duty soft starter designed for large industrial motors requiring controlled starting and stopping. Engineered for reliability in demanding environments, this model supports up to 1050A operational current and is ideal for applications where reducing mechanical stress and electrical inrush current is critical.

Built with advanced torque control technology, the PSTB series ensures smooth motor acceleration and deceleration, minimizing wear on mechanical components such as gearboxes, belts, and couplings. By limiting starting current, it also helps prevent voltage dips in the power supply network, improving overall system stability.

The PSTB1050-600-70 operates in voltage ranges up to 600V and is suitable for heavy industrial sectors including mining, cement plants, water treatment facilities, oil & gas, and large manufacturing operations. Its robust design allows continuous performance under high-load conditions while maintaining energy efficiency.

This soft starter features integrated motor protection functions such as overload protection, phase loss detection, phase imbalance monitoring, and overcurrent protection. The built-in bypass functionality reduces heat generation and power loss during normal operation, enhancing system efficiency and extending product lifespan.

Equipped with an intuitive control interface and communication capabilities, the PSTB1050-600-70 can be seamlessly integrated into modern automation systems. It supports monitoring and diagnostics, enabling predictive maintenance and reducing unexpected downtime.

Key Advantages:

• Rated operational current: 1050A

• Voltage range: Up to 600V

• Advanced torque control for smooth starting and stopping

• Reduced inrush current and mechanical stress

• Integrated motor protection features

• Built-in bypass for energy efficiency

• Designed for heavy-duty industrial applications

• Reliable performance in demanding environments

The ABB PSTB1050-600-70 1050A Soft Starter is the ideal solution for industries that demand safe motor starting, long equipment life, and stable electrical performance.

Technical Specifications

General

• Model: PSTB1050-600-70

• Manufacturer: ABB

• Product Type: Soft Starter (Heavy-Duty Industrial)

• Intended Use: Controlled motor starting and stopping to reduce electrical stress and mechanical wear

Electrical Ratings

• Rated Operational Current (Ie): 1050 A

• Rated Voltage (Ue): Up to 600 V AC

• Control Power Supply: Typically 110–240 V AC/DC (varies by configuration)

• Frequency: 50/60 Hz

Performance

• Reduced Starting Current: Yes

• Adjustable Starting/Stopping Profiles: Yes

• Electronic Torque Control: Yes

• Inrush Current Limitation: Yes

• Voltage Ramp Control: Yes

• Bypass/Contactor Bypass Function: Integrated (reduces heat & losses during run mode)

Motor Protection Functions

• Overload protection

• Phase loss detection

• Phase imbalance monitoring

• Overcurrent protection

• Stall protection

• Built-in thermal protection logic

Control & Communication

• User Interface: Digital display with setup/feedback

• Control Inputs: Start/Stop, external interlocks

• Outputs: Status/fault relay outputs

• Communication Support: Optional fieldbus modules

• Remote Monitoring: Supports diagnostics and service monitoring

Mechanical Features

• Mounting: Panel / DIN Rail (adapter frame depending on size)

• Construction: Rugged industrial enclosure

• Cooling: Air-cooled

• Serviceability: Modular replaceable parts

Environmental

• Operating Temperature: Standard industrial range (commonly −25°C to +60°C)

• Storage Temperature: Typical industrial range

• Humidity: Designed for industrial environments

• Protection Class: IP20 (common — check specific variant)

• Certifications: CE, UL/IEC compliance (region dependent)

Dimensions & Weight

• Height: Engineering-class size (consult datasheet)

• Width: Mid to high industrial range

• Depth: Panel mount footprint

• Weight: Heavy-duty class — robust internal components

Typical Applications

• Pumps and compressors

• Fans and blowers

• Conveyor and material handling systems

• Crushers and mills

• HVAC large motor control

• Water & wastewater treatment

• Mining and process industries