ABB is a global leader in electrification with over 130 years of history. The ABB soft starter lineup includes three series for different applications: PSR (compact, up to 55 kW), PSE (mid-range, up to 132 kW), and PSTX (top series with full functionality).

PSR Series — Compact Solution

ABB PSR soft starters are the most compact in their class. Current range 3–105 A (up to 55 kW at 400 V). Built-in bypass contactor reduces heat dissipation after ramp-up. Suitable for pumps, fans, and conveyors with standard starting modes.

PSE Series — Extended Functionality

ABB PSE soft starters cover power range from 7.5 to 132 kW. Extended motor protection: overload monitoring, phase imbalance, ground fault. External bypass contactor connection available. Optimal choice for industrial facilities with enhanced protection requirements.

PSTX Series — Maximum Capabilities

The top-tier ABB PSTX series features adaptive torque control, built-in bypass, Modbus RTU and Profinet interfaces, range up to 710 kW. Intelligent starting algorithm optimizes the ramp-up curve for specific loads. Ideal for heavy-duty applications: crushers, mills, compressors with high inertia moments.

Voltage Range and Applications

All ABB soft starter series operate in the 200–690 V voltage range. Typical applications: pump soft starting, fans, compressors, conveyors, crushers, and mixers. The soft stop function is particularly useful for pumping stations — it prevents water hammer in pipelines.

Frequently Asked Questions

What is the difference between ABB PSR, PSE and PSTX series?

PSR is a compact series for standard applications up to 55 kW with built-in bypass. PSE is a mid-range series with extended protection up to 132 kW. PSTX is the top series with full functionality: adaptive control, Modbus/Profinet, up to 710 kW, built-in bypass and advanced diagnostics.

What motors are compatible with ABB soft starters?

ABB soft starters are designed for three-phase asynchronous motors rated from 5.5 to 200 kW (depending on series). Operating voltage: 200–690 V. Typical applications: pumps, fans, compressors, conveyors, crushers.

Do ABB soft starters have a built-in bypass contactor?

Yes, PSR and PSTX series have a built-in bypass contactor. After ramp-up completion, thyristors are bypassed by a mechanical contactor, reducing heat dissipation and improving reliability. PSE series requires an external bypass.

How to select an ABB soft starter by motor power?

Selection is based on motor rated current. Determine the current from the motor nameplate, consider the starting mode (standard or heavy-duty), and choose a model with the nearest higher rating. For frequent starts, increase the rating by one step.

What warranty is available for ABB soft starters?

Manufacturer warranty is 24 months from delivery date. We provide technical support, selection assistance and service across Ukraine. ABB soft starter service life is 15–20 years under proper operating conditions.