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300A, 600V, 3-phase integrated bypass soft starter from ABB’s PSTX series, providing smooth motor starting and stopping as well as comprehensive motor protection
Parámetros clave: Rated current 300A (AC-53b), rated voltage 208–600V AC, control voltage 100–240V AC, protocolos de comunicacion: Modbus, EtherNet/IP, BACnet
Funciones principales: Voltage ramp / torque control start, current limit (estándar / dual / ramp), soft stop, integrated bypass contactor, full-featured motor protection
Certificaciones: Cumple con IEC/EN 60947-4-2, UL 508, CSA C22.2 No. 14, CE, CCC
- Model Number Explanation
| Código | Descripción |
| PSTX | ABB advanced smart soft starter series |
| 300 | Corriente operativa nominal: 300A (continuous current under AC‑53b) |
| 600 | Rated operational voltage: 600V (applicable range: 208–600V AC) |
| 70 | Control voltage range: 100–240V AC (universal for 50/60Hz) |
- Especificaciones técnicas completas
| Categoría | Detalles |
| Eléctrico | • Rated operational current (AC‑53b): 300A |
| • Rated operational voltage (ue): 208–600V AC | |
| • Phase: 3 | |
| • Control voltage (Us): 100–240V AC (50/60Hz) | |
| • Compatible power: 160kilovatios (400V), 200caballos de fuerza (460V) | |
| • Starting method: Soft start/stop with integrated bypass | |
| • Breaking capacity: 50el (600V) | |
| • Overload capacity: 1.1×In (continuous at 40°C) | |
| • Starting current limit: 3 modos (estándar / dual / ramp), up to 3.5×In | |
| Mecánico & Ambiental | • Ingress protection: IP00 |
| • Mounting: Carril DIN / bolt mounting | |
| • Operating temperature: ‑25°C to +60°C | |
| • Storage temperature: ‑40°C to +80°C | |
| • Relative humidity: 5–95% (non‑condensing) | |
| • Dimensions (Ancho×Alto×Profundidad): 250×368×190mm | |
| • Weight: aprox. 12kilos | |
| Características | • 3‑phase fully controlled thyristor control with integrated bypass contactor (reduces power consumption) |
| • Multiple starting modes: voltage ramp, torque control, current limit | |
| • Soft stop function (prevents water hammer, ideal for pump loads) | |
| • 15 motor protection functions: sobrecarga, rotor bloqueado, pérdida de fase, phase imbalance, falla a tierra, etc.. | |
| • Modular design, supports DIN rail and door mounting | |
| • Graphic display with 4‑key operation, supports remote monitoring and parameter setting |
- Key Advantages
- Integrated bypass design: Automatically switches to bypass contactor after startup, lowers operating power consumption (≤1.5W) and extends thyristor service life
- Comunicación flexible: Built-in Modbus RTU/TCP, EtherNet/IP, BACnet for easy integration into industrial networks
- Protección integral: Full motor, short-circuit and overload protection in compliance with IEC 60947-4-2
- Amplia compatibilidad de voltaje: 208–600V AC universal input, globally applicable for complex grid conditions
- User-friendly operation: Removable HMI panel supports door mounting; status reading and parameter adjustment without shutdown
- Detailed Applications
4.1 Tratamiento de agua & Fluid Handling
Large pump control: Centrifugal / axial / mixed flow pumps in municipal water supply and wastewater treatment plants; soft stop prevents water hammer and reduces pipeline pressure shock
Submersible sewage pumps: Reduces mechanical stress during startup, avoids cavitation and reverse flow impact, improves system reliability
Chemical process pumps: Smooth startup for high-viscosity fluid pumps, minimizes mechanical seal wear and extends service life
4.2 Manufacturing & Manejo de materiales
Compressor systems: Smooth startup for air and refrigeration compressors, reduces grid impact and prevents belt slippage
Crushers / grinders: Heavy-duty crushing equipment in mining and building materials; current-limited startup controls mechanical shock and protects drive systems
Sistemas transportadores: Long-distance belt conveyors; smooth acceleration avoids material spillage and reduces belt tension stress
Mezcladores / agitators: Mixers in food and pharmaceutical industries; torque-controlled startup ensures process stability
4.3 Edificio & Infraestructura
sistemas de climatización: Grandes ventiladores (cooling towers, unidades de aire acondicionado) y bombas; soft starting reduces impact on building power grids
Metro / tunnel ventilation: Synchronous soft starting of multiple high-power fans to avoid interference with lighting and signaling systems
Fire pumps: Main and backup pumps in emergency fire systems; ensures reliable startup in compliance with fire safety codes
4.4 Special Industrial Applications
Pulp & papel: Vacuum / pressure fans for paper machines; smooth startup protects precision drive systems
Oilfield production: Pumping units and water injection pumps; adapts to harsh field environments and improves equipment reliability
Port machinery: Auxiliary motors for cranes and handling equipment; soft starting protects hydraulic systems
- Cross-Reference for International Brand Equivalents
| Marca | Serie | Modelo | Parámetros clave | Capacidad de ruptura | Código de pedido |
| Schneider | ATS48 | ATS48D32Q | 320A, 208–600V, 100–240V control | 50el | ATS48D32Q |
| siemens | 3RW55 | 3RW5546‑6HA14 | 300A, 208–690V, 24V control | 50el | 3RW5546‑6HA14 |
| Eaton | DMX | DMX300S600 | 300A, 208–600V, 100–240V control | 50el | DMX300S600 |
| Rockwell | SMC‑50 | SMC‑50‑300A‑1 | 300A, 208–600V, 100–240V control | 50el | 150‑S300NBD |
| TEJIDO | PST | PST300‑600‑70 | 300A, 208–600V, 100–240V control | 50el | PST300‑600‑70 |
- Complete ABB PSTX Series Model List (Standard Order Codes)
The PSTX series is available in various rated currents for different motor powers. Core models are listed below:
| Corriente nominal | Modelo | Standard Order Code | Compatible Power (400V) | Compatible Power (460V) |
| 30A | PSTX30‑600‑70 | 1SFA898104R7000 | 15kilovatios | 20caballos de fuerza |
| 37A | PSTX37‑600‑70 | 1SFA898105R7000 | 18.5kilovatios | 25caballos de fuerza |
| 45A | PSTX45‑600‑70 | 1SFA898106R7000 | 22kilovatios | 30caballos de fuerza |
| 60A | PSTX60‑600‑70 | 1SFA898107R7000 | 30kilovatios | 40caballos de fuerza |
| 72A | PSTX72‑600‑70 | 1SFA898108R7000 | 37kilovatios | 50caballos de fuerza |
| 85A | PSTX85‑600‑70 | 1SFA898109R7000 | 45kilovatios | 60caballos de fuerza |
| 105A | PSTX105‑600‑70 | 1SFA898110R7000 | 55kilovatios | 75caballos de fuerza |
| 142A | PSTX142‑600‑70 | 1SFA898111R7000 | 75kilovatios | 100caballos de fuerza |
| 170A | PSTX170‑600‑70 | 1SFA898112R7000 | 90kilovatios | 125caballos de fuerza |
| 210A | PSTX210‑600‑70 | 1SFA898113R7000 | 110kilovatios | 150caballos de fuerza |
| 300A | PSTX300‑600‑70 | 1SFA898114R7000 | 160kilovatios | 200caballos de fuerza |
| 370A | PSTX370‑600‑70 | 1SFA898115R7000 | 200kilovatios | 250caballos de fuerza |
| 470A | PSTX470‑600‑70 | 1SFA898116R7000 | 250kilovatios | 350caballos de fuerza |
| 570A | PSTX570‑600‑70 | 1SFA898117R7000 | 315kilovatios | 400caballos de fuerza |
| 720A | PSTX720‑600‑70 | 1SFA898118R7000 | 400kilovatios | 500caballos de fuerza |
| 840A | PSTX840‑600‑70 | 1SFA898119R7000 | 450kilovatios | 600caballos de fuerza |
- Selección & Application Notes
- Cargar coincidencia: 300A fits 160kW motors at 400V and 200HP motors at 460V. Consider load type (admirador / pump / compressor) and starting conditions during selection
- Installation notes: Montaje en carril DIN estándar de 35 mm; keep ≥50mm clearance above and below for heat dissipation; vertical installation recommended
- Communication setup: Modbus RTU supported by default; EtherNet/IP or BACnet can be enabled via parameter settings
- Protection configuration: Set overload curve, locked rotor protection, phase loss protection, etc., according to motor parameters to ensure safe operation
- Replacement selection: Match rated current, voltage range, control voltage and protection functions when replacing; prefer equivalent advanced smart soft starters
Unsuitable Applications
Applications requiring variable frequency speed control (ABB ACS series drives recommended)
Special voltage systems below 100V or above 600V
Outdoor / humid environments requiring IP20 or higher protection (protected version or enclosure required)
Key Differences Between ABB PSTX300-600-70-1 and PSTX300-600-70
- Official Model Definition & Order Codes
Standard model: PSTX300-600-70, official order code: 1SFA898114R7000
Model with suffix-1: PSTX300-600-70-1, typically corresponds to 1SFA898114R7001 (special configuration version)
- Diferencias fundamentales
| Artículo | PSTX300‑600‑70 (Estándar) | PSTX300‑600‑70‑1 (‑1 Version) |
| Control voltage | 100–240V AC (50/60Hz universal) | 24En DC (DC control supply) |
| Suffix meaning | “70” indicates standard AC control voltage | “‑1” typically indicates 24V DC control version |
| Solicitud | General industrial and commercial use, standard AC control circuits | Suitable for safety circuits, control PLC, DC control systems and other low‑voltage control applications |
| Comunicación | Idéntico: built‑in Modbus RTU/TCP, EtherNet/IP, BACnet | Idéntico |
| Core ratings | Idéntico: 300A, 600V, integrated bypass, operating temp up to 60°C | Idéntico |
| Physical dimensions | Idéntico: 250×368×190mm, 12kilos, 35mm DIN rail mount | Idéntico |
- Descripción detallada
- Control voltage difference: This is the fundamental distinction. The standard version uses 100–240V AC control power, while the-1 version uses 24V DC to suit different control system power supplies
- Configuration positioning: The “-1” suffix in ABB soft starter naming generally denotes a 24V DC control version, designed for integration with PLC, DCS and other DC control systems, or safety applications requiring electrical isolation between control and main circuits
- Functional consistency: Except for control voltage, all core functions are identical:
300A rated operational current, suitable for 160kW (400V) / 200caballos de fuerza (460V) motores
3-phase fully controlled thyristor control with integrated bypass contactor (operating power ≤1.5W)
Multiple starting modes: voltage ramp, torque control, current limit
15 motor protection functions: sobrecarga, rotor bloqueado, pérdida de fase, phase imbalance, falla a tierra, etc..
Removable graphic HMI panel with 15 language support
- Recomendaciones de selección
- Control supply matching: Select standard version for AC control systems and-1 version for DC control systems
- Safety requirements: For safety applications requiring isolation between control and main circuits, the 24V DC-1 version is preferred
- Spare parts management: Distinguish between the two models to avoid failure due to control voltage mismatch
- Replacement compatibility: Identical mounting, communication and protection features; interchangeable with appropriate control power supply (subject to system compatibility check)
The only substantive difference between ABB PSTX300-600-70-1 and PSTX300-600-70 is the control voltage: standard version is 100–240V AC, while the-1 version is 24V DC. All other core parameters, functions and physical dimensions are identical. Selection should be based on control system power type and safety requirements.
