ABB PSR Series Compact Soft Starters

# **ABB PSR Series Compact Soft Starters – Smart, Reliable, and Space-Saving Motor Control**
In today’s industrial world, where efficiency, reliability, and compact design are crucial, the need for smooth and intelligent motor control has never been greater. Traditional starting methods—such as direct-on-line (DOL) or star-delta starters—often cause high inrush currents and mechanical stress, leading to unnecessary wear and reduced system reliability.
To address these challenges, **ABB developed the PSR Series Compact Soft Starters**, offering a **simple, reliable, and space-efficient** solution for smooth motor starting and stopping. The PSR series combines ABB’s advanced technology with a cost-effective design, making it the ideal choice for small to medium-sized motor applications.
## **1. Product Overview: Compact Design, Big Performance**
The **ABB PSR Series Soft Starter** is part of ABB’s comprehensive motor control family, alongside the PSE and PSTX ranges. The PSR is the **most compact and user-friendly model**, designed specifically for applications that require **basic yet reliable motor starting**.
Covering a **current range from 3 A to 105 A** (for motors up to **55 kW**) and rated for voltages up to **600 V AC**, the PSR is perfectly suited for:
* HVAC and ventilation systems
* Water pumps and compressors
* Conveyor belts and packaging machinery
* Building automation and light industrial systems
Its compact modular design makes it easy to install in control panels, helping users **save space, simplify wiring, and reduce installation costs**.
## **2. Key Technical Advantages**
### **(1) Smooth Three-Phase Motor Control**
The PSR series uses **three-phase voltage ramp control**, gradually increasing the voltage supplied to the motor.
This ensures a **smooth and controlled acceleration**, eliminating mechanical shock and minimizing electrical stress on both the motor and the power network.
The result is **longer equipment life, reduced downtime, and improved process stability**.
### **(2) Built-In Bypass Contactor – Higher Efficiency, Lower Heat**
Unlike conventional soft starters, the ABB PSR features a **built-in bypass contactor** that automatically activates once the motor reaches full speed.
This design significantly reduces power losses and heat generation during steady-state operation, delivering:
* Higher energy efficiency
* Less cabinet heating
* Longer product lifespan
* Simplified system wiring
Thanks to the integrated bypass, there is **no need for external contactors**, saving both space and wiring costs.
### **(3) Reliable and Durable for All Environments**
Built with ABB’s strict quality standards, the PSR soft starter offers **excellent electrical durability and environmental resistance**.
It operates reliably in ambient temperatures from **-25°C to +60°C** and complies with **IEC, UL, and CSA international standards**.
This makes it ideal for installations in harsh industrial conditions where reliability is essential.
### **(4) Easy Installation and Quick Setup**
The PSR series is designed for **maximum simplicity**.
All main parameters—starting time, stopping time, and initial voltage—can be adjusted using just **three rotary knobs** on the front panel.
No programming or external configuration tools are required, making commissioning fast and intuitive.
Additionally, it supports **both DIN-rail and screw mounting**, and the clear terminal labeling helps ensure a quick and error-free installation process.
## **3. Comprehensive Protection Features**
Despite its compact size, the PSR includes several essential protection functions to ensure safe and reliable operation:
* **Overtemperature protection**
* **Start time limit**
* **Phase loss detection**
* **Control voltage undervoltage/overvoltage protection**
These features help protect both the soft starter and the connected motor from common electrical faults, reducing the risk of equipment damage or unexpected downtime.
## **4. Typical Applications**
The ABB PSR Series is ideal for a wide range of low to medium power applications, including:
### **1. Pump Systems**
The PSR ensures smooth acceleration and deceleration of water pumps, effectively reducing water hammer and protecting valves and piping systems from mechanical stress.
### **2. Fans and HVAC Systems**
For ventilation and air conditioning applications, PSR enables soft motor operation, reducing vibration, noise, and bearing wear, while improving overall system comfort and efficiency.
### **3. Conveyors and Packaging Machines**
In conveyor or material-handling systems, PSR eliminates jerks and belt slippage during startup, ensuring smooth material flow and protecting mechanical components.
### **4. Building Automation and Small Industrial Loads**
In commercial buildings and small factories, PSR offers reliable soft starting for motors used in fans, compressors, and lighting systems, contributing to energy savings and extended equipment life.
## **5. Market Competitiveness**
Compared to similar models such as Schneider ATS01, Siemens 3RW30, and Mitsubishi S-T10, the **ABB PSR Series** offers several clear advantages:
1. **Most compact design** in its class – saves up to 50% panel space.
2. **Built-in bypass contactor** – no external components required.
3. **Simplified operation** – three easy settings for instant commissioning.
4. **High reliability** with global IEC/UL/CSA certification.
5. **Comprehensive ABB support** – available in over 100 countries worldwide.
These strengths make the PSR one of the **most cost-effective and dependable soft starters** for OEMs, panel builders, and system integrators.
## **6. Conclusion: Compact Design, Powerful Control**
The **ABB PSR Series Compact Soft Starter** perfectly combines simplicity, reliability, and energy efficiency.
It delivers smooth motor operation, extends equipment lifespan, and ensures optimal performance in limited space environments.
Whether used in water supply systems, ventilation units, or automated production lines, the PSR provides **a smart, compact, and efficient motor control solution** tailored for today’s industrial needs.
**Choosing ABB PSR means choosing reliability, simplicity, and long-term performance — a compact solution with big advantages for modern motor control.**
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