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ABB PSTB470-600-70 Soft Starter  

Introduction

The ABB PSTB470-600-70 is a high-performance soft starter from the PSTB series, designed for 470 A rated current and supporting 208 … 600 V AC three-phase motors. It provides smooth motor starting and stopping, reduces mechanical and electrical stress, and includes built-in motor protection and bypass for enhanced reliability and efficiency.

Technical Data

Advantages and Features

• High-power motor capability – Rated for 470 A, suitable for large and medium motors.

• Smooth starting and stopping – Voltage ramp and current limit modes reduce stress.

• Comprehensive protection – Electronic overload, undervoltage/overvoltage, phase loss, overheating.

• Built-in bypass – Improves efficiency and reduces heat generation.

• Smart communication – Modbus onboard, fieldbus expansion supported.

• Versatile applications – Ideal for pumps, fans, compressors, and heavy-duty machinery.

• Easy maintenance – Modular design simplifies installation and servicing.

Application Fields

• Pumping stations and water treatment – Large centrifugal and lift pumps

• Fans and compressors – Blowers, cooling fans, air compressors

• Heavy-duty machinery – Conveyors, crushers, mills

• Industries – Petrochemical, metallurgy, power generation

• HVAC systems – Large cooling water pumps, air handling units

Precautions

1. Verify motor parameters – Ensure motor voltage and current ratings match the soft starter.

2. Installation environment – Provide ventilation; avoid high temperature, humidity, dust, or corrosive atmosphere.

3. Correct wiring – Follow wiring diagrams carefully, verify phase sequence and grounding.

4. Parameter settings – Adjust current limit and ramp-up times according to load.

5. Bypass switching – Ensure proper bypass wiring to prevent arcing.

6. Maintenance – Regularly inspect terminals, relays, fans, and cooling channels.

7. Avoid excessive frequent starts – Follow recommended start frequency limits to prevent overheating.

The structure and details of the product：

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