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The ABB PSTX300-600-70 (catalog number 1SFA898114R7000) is part of ABB’s PSTX family of open softstarters. It is designed to manage the soft start and stop of three-phase motors, reducing mechanical and electrical stress during motor startup, minimizing inrush current, and prolonging motor and system life. The unit supports a wide supply voltage range (208–600 V AC) and can control motors requiring up to 300 A operational current when connected inline, or up to 515 A when used in a delta configuration.
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PSTX300-600-70 softstarter provides both voltage ramp and torque ramp start/stop control, giving flexibility depending on motor load and application. It includes a built-in bypass to bypass the softstarter after startup for energy-efficient full-line operation — reducing losses once the motor is up to speed.
| Parameter / Feature | Specification / Description |
|---|---|
| Product Name | ABB PSTX300-600-70 Softstarter |
| Product Code | 1SFA898114R7000 |
| Main Supply Voltage | 208–600 V AC, 3-phase |
| Control Supply Voltage | 100–250 V AC, 50/60 Hz |
| Rated Operational Current (Inline) | 300 A |
| Rated Operational Current (Inside Delta) | 515 A |
| Rated Motor Power (Inline) | 90 kW @ 230 V • 160 kW @ 400 V • 200 kW @ 500 V |
| Rated Motor Power (Inside Delta) | 160 kW @ 230 V • 257 kW @ 400 V • 355 kW @ 500 V |
| Frequency | 50/60 Hz |
| Built-in Bypass | Yes |
| Start/Stop Control Methods | Voltage ramp, torque ramp, current limit start, kickstart |
| Softstop Methods | Voltage or torque ramp stop |
| Motor Protection | Overload protection, locked-rotor detection, phase loss, phase imbalance, under/over-voltage, ground fault, motor heating compensation |
| Advanced Features | Pump-cleaning mode, jog function, dual overload curves, standstill brake, dynamic brake, automatic restart, real-time clock, event logs |
| Communication Options | Modbus-RTU, Modbus-TCP, Ethernet/IP, Profinet, Profibus, EtherCAT; optional modules for DeviceNet, CANopen, BACnet |
| Analog Outputs | 0–10 V / 0–20 mA / 4–20 mA |
| Relay Outputs | RUN (NO), TOR (NO), EVENT (NO) |
| Indicators / LEDs | Ready/Start, Running, Warning, Fault |
| Enclosure Type | IP00 |
| Dimensions (H × W × D) | 470 mm × 258 mm × 279 mm |
| Net Weight | Approx. 15.5 kg |
| Operating Temperature | –25 °C to +60 °C |
| Storage Temperature | –40 °C to +70 °C |
| Typical Applications | Pumps, fans, compressors, conveyors, industrial machinery |