Streamlined Motor Control with the ABB PSR105‑600‑70 Soft Starter

 

In modern industrial environments, smooth and efficient motor control is essential to prevent wear, minimize energy consumption, and enhance system reliability. Enter the ABB PSR105‑600‑70 soft starter—a compact yet powerful solution designed for motors up to 105 A and 208–600 V AC. At AMPS Electric Trading, we’re proud to supply this robust product, offering a valuable blend of performance and practicality.

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What Makes the PSR105 Stand Out?

✅ Wide Voltage and Current Range

Able to handle voltages from 208 to 600 V AC and currents up to 105 A, the PSR105 meets the needs of diverse motor-driven systems .

✅ Dual-Phase Soft Start/Stop

Utilizing a two-phase voltage ramping method, this soft starter reduces inrush current and mechanical stress during both motor startup and shutdown .

✅ Built-in Bypass Relay

With an integrated bypass, the PSR105 ensures energy-efficient operation at full speed and simplifies installation—eliminating external contactors .

✅ User-Friendly Control and Diagnostics

Three front-mounted potentiometers allow intuitive adjustment of start and stop ramp times and initial voltage. LED indicators show ON/ready, run/top-of-ramp, and ramping status. Relay outputs signal “RUN” and “Top of Ramp” for system integration.

✅ Versatile Control Voltage and Mounting

The control supply accepts 100–240 V AC (50/60 Hz) and 24 V DC, offering flexibility based on system architecture. Designed for IP10-rated mounting, the starter fits neatly into control panels, with screw or DIN-rail options .

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Technical Highlights at a Glance

Feature	Specification
Rated Operational Voltage	208–600 V AC
Rated Operational Current	105 A
Control Supply Voltage	100–240 V AC / 24 V DC
Power Rating	Up to 55 kW @ 400–500 V
Starting Capacity	Up to 4× Ie for 6 s
Ramp Time	Start: 1–20 s, Stop: 0–20 s
Motor Power (UL/CSA)	Up to 100 HP @ 550–600 V
Ambient Temperature	–25 °C to +60 °C
Mounting	Screw or DIN-rail; IP10 enclosure

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Why the PSR105 Benefits Industrial Applications

⚙️ Mechanical Longevity & Smooth Operation

By gradually ramping voltage, the PSR105 minimizes mechanical stress, reducing wear and noise while increasing system reliability.

💡 Energy Efficiency

The integrated bypass relay deactivates thyristors once full speed is reached—cutting internal losses and trimming energy costs.

🛠️ Simplified Installation & Maintenance

With adjustable settings and clear LED indicators, commissioning and troubleshooting become faster. Its compact design also saves space in control cabinets.

🔄 High Cycling Capacity

Rated for up to 100 starts per hour, it supports frequent operation—ideal for applications like pumps, fans, compressors, and conveyors .

🔌 Flexible Control Integration

With dual-voltage control options and relay outputs, the PSR105 seamlessly connects to various PLC systems, contactors, and Auxiliary circuits.

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Real-World Applications

The ABB PSR105‑600‑70 excels in scenarios like:

• Pump systems – gentle ramp-up/down prevents water hammer effects

• Ventilation systems and fans – reducing startup surges

• Compressors – extending compressor and motor life

• Conveyor lines – minimizing belt tension and jar during starts
  These benefits contribute to lower maintenance needs, reliable uptime, and optimized energy use.

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Conclusion

The ABB PSR105‑600‑70 soft starter packs advanced motor control into a compact and accessible device. With adjustable settings, clear status signaling, and energy-saving bypass functionality, it’s a compelling choice for optimizing motor-driven systems.

At AMPS Electric Trading, we offer expert guidance in selecting and integrating the right soft starter for your applications. Contact us to discuss how the PSR105 can enhance productivity and efficiency in your facility.