ABB PSTB840-600-70 Inverter - Soft Starter

Product Overview

The ABB PSTB840‑600‑70 is an industrial-grade Soft Starter / motor control module for three-phase AC motors. It provides smooth start and stop, limits starting current, reduces mechanical stress, and extends motor and equipment life. It is suitable for high-power motors in pumps, fans, compressors, conveyors, and industrial production lines, ensuring safe and reliable operation.

Technical Specifications

• Model: PSTB840‑600‑70

• Type: Soft Starter / Motor Control Module

• Rated Voltage: 208–600 V AC, three-phase

• Rated Operational Current: 840 A

• Applicable Motor Power: ~450–600 kW (depending on motor efficiency and voltage)

• Control Supply Voltage: 100–250 V AC, 50/60 Hz

• Start/Stop Mode: Smooth start and stop

• Start Voltage Range: 30% – 70% adjustable

• Ramp Time (Start/Stop): Start 1–30 s, Stop 0–30 s (adjustable)

• Protection Functions: Overload, short circuit, phase loss, jam protection

• Communication Interface: Optional Modbus or Fieldbus

• Operating Temperature: 0–50 °C (operation), –25–70 °C (storage)

• Mounting: Panel or DIN rail

• Protection Class: IP20

Key Features & Advantages

• Smooth start and stop reduces mechanical and electrical stress

• Starting current limitation protects equipment and power supply

• High-power capacity supports motors up to 840 A rated current

• Flexible parameter settings for start voltage, ramp time, and overload current

• Built-in protection: overload, short circuit, phase loss, jam

• Modular design for easy installation, maintenance, and integration

• Remote monitoring: optional communication modules for automation

Application Areas

• Large industrial pumps and water treatment systems

• Fans, ventilation systems, HVAC and cooling equipment

• Compressors and refrigeration equipment

• Conveyors, hoisting machinery, and industrial drives

• Chemical, metallurgical, mining, and high-power production lines

• Automated factories and heavy industrial equipment

Precautions

1. Ensure supply voltage matches the soft starter rating

2. Install in a well-ventilated environment to avoid overheating

3. Tighten all terminals to ensure reliable connections

4. Avoid frequent start/stop beyond design limits

5. Configure start, ramp, and overload parameters according to motor/load characteristics

6. Use protective measures in high humidity, dust, or corrosive environments

7. Disconnect power during installation and maintenance, follow electrical safety standards