ABB PSTX570-600-70 Heavy Duty Soft Starter

The ABB PSTX570-600-70 represents ABB’s high-performance soft starter solution for demanding motor control applications. Designed for three-phase asynchronous motors, this heavy-duty unit provides smooth acceleration and deceleration, significantly reducing mechanical stress on driven equipment and electrical stress on power systems.

As part of ABB’s premium PSTX series, the ABB PSTX570-600-70 combines advanced thyristor technology with intelligent control algorithms to deliver precise torque control across its entire operating range. The unit’s robust construction ensures reliable operation in harsh industrial environments, from mining operations to water treatment plants.

With its 570A current rating and support for voltages up to 690V, the ABB PSTX570-600-70 is particularly suited for large pumps, fans, compressors, and conveyor systems where controlled starting is critical for operational efficiency and equipment longevity.

Detailed Parameter Table

Core Advantages and Technical Highlights

Precision Motor Control:

The ABB PSTX570-600-70 features adaptive torque control that automatically adjusts to load conditions, providing optimal acceleration characteristics regardless of mechanical variations.

Energy Efficient Operation:

Patented algorithms minimize current draw during start-up, reducing peak demand charges by up to 50% compared to direct-on-line starting.

Advanced Protection Suite:

Comprehensive motor and system protection includes:

Thermal overload protection with motor memory function

Phase imbalance detection

Underload supervision

Jam protection

Power factor correction monitoring

Flexible Configuration:

Multiple control options including:

3-wire and 2-wire control

Local and remote operation modes

Analog (4-20mA/0-10V) and digital inputs

Modbus RTU communication protocol

Rugged Construction:

Heavy-duty thyristors with integrated snubber circuits and industrial-grade heat sinks ensure reliable operation in ambient temperatures up to 50°C without derating.

Diagnostic Capabilities:

Built-in LCD display provides real-time monitoring of:

Motor current (all phases)

Voltage levels

Power factor

Thermal capacity used

Event log with time stamping

Typical Application Scenarios

Water/Wastewater Treatment:

Gentle starting of large centrifugal pumps (up to 500HP) to prevent water hammer effects in pipeline systems.

Mining Operations:

Controlled acceleration of conveyor belt systems carrying heavy mineral loads, reducing belt slippage and mechanical wear.

HVAC Systems:

Smooth ramp-up of large cooling tower fans in commercial buildings, eliminating current surges during start-up.

Oil & Gas:

Reliable starting of offshore platform pumps and compressors where electrical system stability is critical.

Cement Production:

Gradual acceleration of large ball mill motors to prevent gear damage and reduce peak power demand.

Installation Commissioning and Maintenance

Installation Guidelines:

Mount the ABB PSTX570-600-70 vertically with minimum 100mm clearance on all sides for proper ventilation. Use copper conductors rated for at least 600A. Ensure proper grounding per NEC/IEC standards.

Commissioning:

Use the intuitive LCD interface to:

Set motor nameplate parameters

Configure acceleration/deceleration times

Program protection settings

Test start/stop sequences

Verify communication settings

Maintenance:

Quarterly inspection of power terminals

Annual thermal imaging of thyristor modules

Biannual cleaning of cooling fins

Firmware updates via USB port

Replacement of cooling fans after 50,000 hours

Service and Guarantee Commitment

ABB provides a 24-month warranty for the PSTX570-600-70, backed by:

Global 24/7 technical support

On-site start-up assistance

Repair and exchange program

Preventive maintenance contracts

Training programs for operators