Technical Specifications
Parameter Specification
Product Code PSTX250-600-70
Series ABB PSTX Medium Voltage Soft Starters
Rated Voltage 3300 V / 6000 V (switch-selectable)
Rated Current 250 A (continuous at 40°C)
Starting Current Adjustable, typically 200% - 450% of motor FLC (Full Load Current)
Motor Power Range Approx. 1400 - 1850 kW (dependent on voltage & motor characteristics)
Control Supply Voltage 110-120V AC or 220-240V AC, 50/60 Hz (configurable)
Starting Time Adjustable from 5 to 120 seconds
Stopping Time Adjustable soft-stop (optional, 5 to 120 seconds)
Cooling Method Forced air cooling (integrated fans)
Enclosure IP00 / Open Type (for cabinet installation)
Ambient Temperature 0°C to +40°C (32°F to 104°F) for full rating; up to +50°C (122°F) with derating
Altitude Up to 1000 m (3280 ft) without derating
Standards & Approvals IEC, UL, CSA, CE; compliant with IEC 60947-4-2
The ABB PSTX250-600-70 is a high-performance, medium-voltage soft starter engineered for the controlled acceleration and deceleration of large three-phase induction motors. As a member of ABB's advanced PSTX series, it employs sophisticated thyristor technology and microprocessor control to significantly reduce the mechanical and electrical stresses associated with direct-on-line starting. This unit is designed for heavy-duty industrial applications where reliable motor starting, equipment protection, and power quality are critical.