abb softstarter PSTX840-600-70 pstx (600v) range 840 amp

Why Choose the ABB PSTX840-600-70 Softstarter?

The ABB PSTX840-600-70 is a premium heavy-duty softstarter designed for advanced motor starting, stopping and protection in demanding industrial environments. As part of the intelligent ABB PSTX softstarter series, it delivers reliable control for large three-phase motors while reducing electrical stress, minimising mechanical wear and improving operational efficiency.

Engineered for critical industrial applications, the PSTX840-600-70 combines sophisticated torque control, integrated bypass functionality and advanced motor protection features in a robust industrial platform. Its intelligent control algorithms help extend equipment life, improve process stability and simplify integration into modern automation systems.

With a rated operational current of 840 A and support for 208–600 V AC three-phase systems, this ABB softstarter is ideal for large pumps, compressors, conveyors, fans and process machinery. The detachable full graphic keypad, integrated Modbus communication and optional fieldbus support simplify commissioning, diagnostics and operational monitoring in industrial automation environments.

Key Advantages

• Advanced soft starting and stopping control for heavy industrial motors.
• 840 A operational current for large-scale applications.
• 208–600 V AC three-phase compatibility.
• Integrated bypass contactor improves energy efficiency and reduces heat.
• Built-in electronic overload and motor protection functions.
• Integrated Modbus RTU with optional major fieldbus protocol support.
• Advanced torque control and pump cleaning functionality.

Key Features

• ABB PSTX advanced softstarter range.
• 840 A rated operational current.
• 208–600 V AC operating voltage range.
• Integrated electronic overload protection.
• Built-in bypass for lower energy consumption.
• Voltage ramp and torque ramp start methods.
• Detachable IP66 / Type 4X graphic keypad.
• Integrated Modbus RTU communication interface.
• Support for Profinet, Profibus, Ethernet/IP, Modbus TCP and other protocols.
• Functions including kickstart, braking, sequence start and emergency mode.

Technical Specifications

• Manufacturer: ABB
• Series: PSTX Softstarters
• Model: PSTX840-600-70
• Product ID: 1SFA898119R7000
• Product type: Softstarter
• Rated operational current: 840 A
• Operational voltage: 208–600 V AC
• Control supply voltage: 100–250 V AC
• Control circuit voltage: 24 V DC
• Frequency: 50 / 60 Hz
• Inline motor power at 400 V: 450 kW
• Inline motor power at 500 V: 600 kW
• Inside delta motor power at 400 V: 800 kW
• Inside delta operational current: 1455 A
• Protection rating: IP00
• Mounting type: Panel mounting
• Dimensions (H × W × D): approx. 493 × 435 × 369 mm
• Weight: approx. 46.5 kg

Advanced Soft Starting for Heavy Industrial Systems

The ABB PSTX series uses intelligent voltage and torque regulation to provide smooth motor acceleration and deceleration while limiting inrush current and reducing mechanical stress on equipment. This improves operational reliability, minimises downtime and extends the service life of motors and driven systems.

The PSTX840-600-70 includes advanced diagnostic and protection features such as current limiting, motor heating, overload protection, braking and event logging. Integrated communication capabilities allow seamless integration into PLC, SCADA and industrial automation systems for enhanced process visibility and control.

Typical Applications

• Industrial pumps and water treatment systems.
• Large compressors and process equipment.
• Heavy-duty conveyor systems.
• Industrial fans and ventilation systems.
• Mining and quarrying operations.
• Large-scale OEM automation systems.

Trusted by Heavy Industry Worldwide

ABB PSTX softstarters are trusted worldwide by industrial engineers and automation specialists for delivering advanced motor control, dependable operation and reduced maintenance in demanding process applications.