ABB PSTX Series PSTX840-600-70 Softstarter Module

Overview

The PSTX840-600-70 is a high-performance softstarter from ABB’s PSTX series. Designed for demanding motor starting applications, it handles up to 840 A and supports 208–600 V AC.

Key Features

Built-in bypass saves energy and simplifies wiring.
Three-phase control ensures smooth motor starts and stops.
Wide control voltage range: 100–250 V AC, 50/60 Hz.
Compact design with a detachable full-graphic display.
Advanced motor protection features ensure safe operation.

Power Ratings

In-line connection:
- 230 V – 250 kW
- 400 V – 450 kW
- 500 V – 600 kW
Inside delta connection:
- 230 V – 450 kW
- 400 V – 800 kW
- 500 V – 1000 kW

Control and Communication

Supports Modbus RTU, Modbus TCP, Profinet, Profibus, and more.
Three programmable digital inputs for flexible integration.
Analog outputs: 0–10 V, 0–20 mA, 4–20 mA.

Protection Functions

Built-in electronic overload protection.
Monitors voltage, current, phase imbalance, and more.
Features emergency mode, locked rotor protection, and motor heating.

Application Range

The PSTX840-600-70 suits medium to large motors.
Common uses include pumps, fans, conveyors, and compressors.
It supports both in-line and inside-delta connections.