Product overview
The ABB PSTX142‑600‑70 is an advanced three-phase motor softstarter that controls motor acceleration and deceleration through adjustable voltage or torque ramps.
It reduces starting current and mechanical stress on motors, pumps, compressors, fans and driven machinery. Its integrated bypass contactor reduces power losses after the motor reaches operating speed.
Technical specifications
| Specification | Details |
|---|---|
| Manufacturer | ABB |
| Product series | PSTX |
| Exact model | PSTX142‑600‑70 |
| Complete ordering code | 1SFA898110R7000 |
| Product type | Advanced three-phase softstarter |
| Maximum operational current | 142 A |
| Main operating voltage | 208–600 VAC |
| Control supply | 100–250 VAC, 50/60 Hz |
| Typical motor rating | 75 kW at 400 VAC |
| Controlled phases | Three |
| Starting method | Voltage ramp or torque-control ramp |
| Stopping method | Soft stop or torque-controlled stop |
| Bypass | Integrated |
| Communication | Built-in Modbus RTU |
| Keypad | Detachable graphical display |
| Installation protection | IP00; panel installation required |
| Analog output | Programmable |
| Relay outputs | Run, top-of-ramp and event functions |
| Circuit boards | Coated for improved environmental resistance |
ABB confirms the 142 A rating, 208–600 VAC operating range and 100–250 VAC control supply on its official PSTX142‑600‑70 product page.
Main features
- Three-phase motor control
- Integrated bypass contactor
- Adjustable current limitation
- Voltage and torque ramp control
- Soft starting and stopping
- Electronic motor-overload protection
- Underload and overload monitoring
- Phase-reversal protection
- Phase-loss protection
- Locked-rotor and stall protection
- Motor-heating function
- Pump-cleaning and kick-start functions
- Detachable graphical keypad
- Event and fault logging
- Built-in Modbus RTU communication
- Optional fieldbus communication adapters
Marine and industrial applications
- Seawater and freshwater pumps
- Ballast pumps
- Fire and general-service pumps
- Cooling-water pumps
- Hydraulic power-pack motors
- Engine-room ventilation fans
- Air compressors
- Refrigeration compressors
- Conveyors
- Bow-thruster auxiliary machinery
- Deck machinery
- Industrial processing equipment
Benefits
- Reduces motor starting current
- Minimizes voltage drop on the vessel’s electrical network
- Reduces mechanical shock to couplings and shafts
- Helps prevent water hammer in pumping systems
- Extends motor and driven-equipment service life
- Reduces panel space through the integrated bypass
- Provides detailed motor and application protection
- Supports automation and remote monitoring
Information required for quotation
- Motor power in kW
- Motor full-load current
- Main operating voltage
- Control-supply voltage
- Normal-duty or heavy-duty application
- Number of starts per hour
- Ambient temperature
- Motor starting time
- Pump, fan, compressor or other load type
- Required fieldbus communication protocol
- Panel ventilation and available installation space
- Required marine or classification approval
