Product Short Description
The ABB PSR25-600-70 is a compact, cost-effective soft starter from the PSR series, engineered for smooth startup and shutdown of three-phase squirrel-cage induction motors. It utilizes solid-state silicon-controlled rectifier (SCR) technology to gradually increase the motor terminal voltage, reducing inrush current and mechanical stress on connected equipment during acceleration and deceleration. Designed for basic yet reliable motor control, it features an integrated bypass contactor for energy-efficient operation once the motor reaches full speed, minimizing heat dissipation and power consumption. With a 25 A rated current and wide voltage compatibility (208–600 V AC), this unit is ideal for small to medium-sized motors in industrial, commercial, and infrastructure applications where space optimization and straightforward setup are priorities.
Description
Technical Specifications
| Parameter | Detail |
|---|---|
| Manufacturer | ABB |
| Model | PSR25-600-70 |
| Product Type | PSR Series Soft Starter |
| Main Circuit Voltage | 208–600 V AC (50/60 Hz) |
| Control Circuit Voltage | 100–240 V AC (50/60 Hz); 24 V DC (optional) |
| Rated Operational Current (Ie) | 25 A (in-line connection) |
| Rated Power (In-Line) | 5.5 kW (230 V AC); 11 kW (400 V AC); 15 kW (500 V AC) |
| Service Factor | 100% |
| Starting Capacity | 4×Ie for 6 seconds |
| Start/Stop Ramp Time | 0–20 seconds (adjustable via front potentiometers) |
| Initial Start Voltage | 40–70% of rated motor voltage |
| Step-Down Voltage (Soft Stop) | 100–60% of rated motor voltage |
| Integrated Bypass Contactor | Yes (energy-saving operation) |
| Signal Outputs | Relay (NO) for RUN, TOR (Torque), and Bypass status |
| Status Indicators | LED indicators for Ready, Running, Ramp Up/Down, and Fault |
| Degree of Protection | IP20 (front and rear) |
| Enclosure Material | Metal |
| Physical Dimensions | 160 mm (Height) × 128 mm (Width) × 45 mm (Depth) |
| Net Weight | 0.6 kg |
| Terminal Type | Screw terminals |
| Main Circuit Connection | 2×2.5–10 mm² (rigid conductors) |
| Control Circuit Connection | 1×0.75–2.5 mm²; 2×0.75–1.5 mm² (rigid conductors) |
| Tightening Torque | Main Circuit: 2.3 N·m; Control/Supply Circuit: 0.6 N·m |
| Ambient Operating Temperature | -25 °C to +60 °C |
| Storage Temperature | -40 °C to +70 °C |
| Relative Humidity | 5–95% (non-condensing) |
| Pollution Degree | Pollution Degree 2 |
| Certifications | CE, CCC, RoHS, UL/CSA (UL 508, CSA C22.2 No. 14-05) |
Functional Features
Smooth Motor Starting & Stopping
- Two-Phase Voltage Ramp Control: Gradually adjusts motor terminal voltage to eliminate high inrush current (typically limited to 4×Ie for 6 seconds), reducing stress on motor windings, driven equipment, and power distribution networks.
- Adjustable Ramp Parameters: Front-mounted potentiometers enable precise tuning of start/stop ramp times (0–20 seconds) and initial start voltage (40–70%), optimizing acceleration for specific loads like pumps, fans, and conveyors.
- Soft Stop Functionality: Smooth deceleration via step-down voltage ramps prevents water hammer in pipelines, mechanical backlash, and sudden load drops, extending component lifespan.
Energy-Efficient Bypass Operation
- Integrated Bypass Contactor: Automatically switches the motor to full-line voltage after reaching rated speed, minimizing power loss and heat generation. This reduces operating costs and cooling requirements compared to non-bypass soft starters.
- Low Heat Dissipation: Compact design with efficient thermal management ensures stable operation in confined panel spaces, even under continuous duty.
Simplified Integration & Control
- Direct Manual Motor Starter (MMS) Compatibility: Dedicated connection kits allow seamless pairing with ABB MS132/MS325 series manual motor starters, simplifying panel design and installation.
- Fieldbus Communication (Optional): Support for external fieldbus adapters (e.g., PS-FBPA) enables integration into Profibus, Modbus, or other industrial networks for remote monitoring, diagnostics, and automated control.
- Multi-Voltage Compatibility: Wide main circuit voltage range (208–600 V AC) accommodates global power systems, reducing inventory needs for regional applications.
Reliable Protection & Diagnostics
- Built-In Relay Outputs: Provides NO contacts for RUN (operation complete), TOR (torque status), and bypass feedback, facilitating interlocking with other control systems or alarm circuits.
- Clear Status Indicators: LED indicators signal Ready (green), Running (green), Ramp Up/Down (amber), and Fault (red), enabling quick visual diagnostics and reducing downtime.
- Robust Environmental Resistance: Operates reliably in harsh industrial environments (-25 °C to +60 °C) with high humidity and vibration tolerance, meeting IP20 protection standards for dust and finger protection.
User-Friendly Design & Installation
- Compact Form Factor: Space-saving footprint (160×128×45 mm) is ideal for tight control panels and retrofits where space is limited.
- Screw Terminal Connections: Accepts rigid conductors up to 10 mm² for main circuits and 2.5 mm² for control circuits, ensuring secure, durable wiring.
- Front-Face Controls: Intuitive potentiometers and LED indicators simplify setup without the need for external software, reducing commissioning time.
Application Scenarios
HVAC & Building Services
- Fans & Blowers: Smooth startup of ventilation, air conditioning, and exhaust fans to prevent belt slippage, motor overheating, and noise surges.
- Pumps (Water/Wastewater): Soft start/sop for circulation pumps, booster pumps, and sewage pumps to eliminate water hammer and protect pipework.
- Compressed Air Systems: Controlled acceleration of air compressors to reduce pressure spikes and energy waste during start-up.
Material Handling & Conveying
- Conveyor Belts: Smooth operation of belt conveyors, roller conveyors, and chain drives to prevent product spillage, belt damage, and motor overloads.
- Cranes & Hoists: Gentle startup/stop of light-to-medium load cranes and hoists to ensure safe load handling and structural stability.
- Packaging Lines: Precise speed control for conveyors, fillers, and sealers in food, beverage, and consumer goods packaging.
Oil & Gas (Midstream/Upstream)
- Metering Skids: Controlled start of flow meters and pressure regulators to ensure accurate measurement and prevent fluid surges.
- Gas Compressors: Soft start/sop for small-to-medium gas compressors to reduce mechanical stress on rotating components and drive trains.
- Offshore Platforms: Reliable motor control for seawater lift pumps, firewater systems, and utility fans in harsh marine environments.
Water & Wastewater Treatment
- Aeration Systems: Smooth startup of blowers for aeration tanks to maintain optimal oxygen levels in wastewater treatment processes.
- Filter Backwash Systems: Controlled operation of backwash pumps to prevent filter media damage and ensure efficient filtration.
- Desalination Plants: Soft start for high-pressure pumps in reverse osmosis (RO) systems to reduce pressure transients and protect membranes.
Food & Beverage Processing
- Mixers & Blenders: Gentle acceleration of mixers, homogenizers, and blenders to prevent product splashing and motor overloads.
- Conveyors & Elevators: Smooth transport of raw materials, finished products, and packaging throughout processing lines.
- Refrigeration Systems: Controlled start of compressors and fans in cold storage and refrigeration units to reduce power demand and wear.
General Industrial Applications
- Machine Tools: Precise speed control for conveyors, feeders, and auxiliary motors in lathes, mills, and machining centers.
- Agricultural Machinery: Soft start for grain conveyors, irrigation pumps, and feed systems in farming and processing operations.
- Power Generation (Auxiliaries): Motor control for cooling fans, water pumps, and auxiliary systems in thermal, hydro, and renewable energy plants.
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