ABB PST72 User Manual

Softstart
Upgrade to Torque control
PST30…300
PSTB370…1050
1SFC132040M0201 RevA Dec-06
Contents
1. ESD Warning...................................................................................................................2
2. Tools................................................................................................................................2
3. PCB information ..............................................................................................................2
4. Step by step.....................................................................................................................3
5. Configuration of the LV board..........................................................................................7

ABB PST72 Specifications

General

Rated Current	72 A
Rated Impulse Withstand Voltage Uimp	6 kV
Protection Class	IP20
Cooling Method	Natural convection
Rated Operational Voltage	690 V AC
Protection Features	Overload
Operating Temperature Range	-25 ... +60 °C
Storage Temperature Range	-40°C to +70 °C
Certifications	CE, UL

Summary

ESD Warning

Tools

PCB Information

Step-by-Step Installation Guide

Preparation and Disconnection

Mark and disconnect main voltage, auxiliary cables, and remove front cover.

Removing Old Boards

Disconnect and remove old HV and LV boards, including by-pass contactor cables.

Mounting New Boards and Cables

Connect new LV and HV boards, including Display, Keypad, and thyristor/fan cables.

Final Connections and Verification

Check current transformer connections, mount cover, and reconnect all cables.

LV Board Configuration

Initial Setup Steps

Power on, navigate to Service Settings, and confirm new PCB setup.

Parameter Settings

Set display language and configure key parameters like CT Ratio Ir., Int ByPass, ByPass AC3, SOPs, and PST(B).

Post-Configuration Checks

Complete programming, set motor current, activate protections, and consult manual for Torque Control.