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The ABB PSTX840-600-70 softstarter is part of ABB’s high-performance PSTX series, engineered for large and demanding motor applications. With a high operational current rating of 840 A and a voltage range of 208–600 V AC, it is suitable for pumps, compressors, fans, conveyors, and other heavy-duty motor systems.
The unit offers advanced soft-start and soft-stop control through voltage and torque ramp functions, minimizing mechanical wear and electrical inrush current. It includes built-in motor protection, such as overload protection, current limiting, jam protection, and kick-start capability.
Featuring an internal bypass for improved efficiency, removable display for easier configuration, and Modbus RTU communication as standard (with optional fieldbus modules), the PSTX840-600-70 provides comprehensive diagnostics and advanced control integration.
Designed for industrial reliability, this model supports both inline and inside-delta motor connections and ensures long operational life in harsh environments
| Specification | Detail |
|---|---|
| Product Family | ABB PSTX Softstarter Series |
| Model / Part Number | PSTX840-600-70 / 1SFA898119R7000 |
| Rated Operational Current | 840 A |
| Main Supply Voltage Range | 208 – 600 V AC |
| Control Supply Voltage | 100 – 250 V AC (50/60 Hz) |
| Motor Power Rating (Inline, 400 V) | Approx. 450 kW |
| Motor Power Rating (Inside Delta, 400 V) | Up to approx. 800 kW |
| Connection Type | 3-phase; Inline or Inside Delta |
| Internal Bypass | Yes |
| Motor Protection Functions | Electronic overload, current limit, jam protection, underload, kick-start, fault diagnostics |
| Control / Communication | Hardwired I/O, removable display, Modbus RTU built-in; optional PROFINET, Profibus, Ethernet/IP modules |
| Control Features | Soft start/stop, voltage ramp, torque ramp, kick-start, pump cleaning, jog mode, braking, diagnostics |
| Protection Class | IP00 (for panel mounting) |
| Ambient Operating Temperature | –25 °C to +60 °C |
| Dimensions (H × W × D) | Approx. 493 × 435 × 369 mm |
| Net Weight | Approx. 46.5 kg |