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ABB PSTB370-600-70 Soft Starter  

Introduction

The ABB PSTB370-600-70 is a high-performance soft starter from the PSTB series, rated at 370 A and designed for 208 … 600 V AC three-phase motors. It ensures smooth starting and stopping, reduces inrush current and mechanical stress, and includes comprehensive motor protection with a built-in bypass contactor for higher efficiency and reliability.

Technical Data

Advantages and Features

• Designed for medium-to-large motors – 370 A capacity for industrial loads.

• Smooth motor control – Minimizes electrical and mechanical stress.

• Comprehensive motor protection – Enhances system safety and reliability.

• Energy-efficient operation – Built-in bypass reduces losses and heating.

• Smart communication – Modbus included, fieldbus expansions available.

• Easy maintenance – Modular design for simplified installation and service.

Application Fields

• Pumping systems & water treatment – Centrifugal and lift pumps

• Fans & ventilation – Blowers, cooling fans

• Compressors & conveyors – Air compressors, belt conveyors

• Heavy-duty industrial equipment – Crushers, mixers, mills

• Energy & metallurgy – Petrochemical, power plants, steel mills

Precautions

1. Parameter matching – Ensure compatibility between motor and soft starter.

2. Installation environment – Provide proper cooling, avoid dust, moisture, and corrosive gases.

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

4. Load settings – Adjust current limit and ramp time based on application.

5. Bypass connections – Ensure proper wiring to avoid arcing issues.

6. Regular maintenance – Inspect terminals, fans, and cooling system.

7. Avoid excessive start cycles – Follow maximum start frequency to prevent overheating.

The structure and details of the product：

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