ABB PSTX Soft Starter – Advanced Motor Starting & Protection

The ABB PSTX soft starter series delivers precise three-phase torque control, integrated bypass contactors, and comprehensive protection to extend the lifetime of motors and mechanical systems. With a global control supply (100–250 V AC/DC) and main supply up to 600 V AC, PSTX is engineered for pumps, fans, compressors, conveyors, and process applications that demand smooth acceleration, soft-stop, and reliable diagnostics.

Key Features

• Supply Range: 208–600 V AC (3-phase); Rated Current: 30…1250 A
• Built-in Bypass: lower heat dissipation & compact panels
• Smart Control: true three-phase torque control; pump soft-stop (water hammer reduction)
• Protection Suite: overload, phase loss/imbalance, under/over-voltage, earth-fault; PTC/PT100 inputs
• Ease of Use: LCD keypad, setup wizards, application macros; consistent interface across the range
• Connectivity: Modbus RTU standard; optional Profibus / DeviceNet / EtherNet/IP

PSTX Selection Table