ABB PSTX370 User Manual

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Softstarters Type PSTX30...PSTX570

User Manual short form

1SFC132082M9901

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Questions and Answers:

B
bryan36Aug 22, 2025
What causes an electronic overload in my ABB Controller and how can I resolve it?
- P
  Paul RiceAug 22, 2025
  An electronic overload occurs when the motor current is too high for an extended period, often due to a high load on the motor shaft. To resolve this: * Examine start conditions and EOL settings. * Correct the reason for the overload. * Ensure the current limit level is not set too low. * Verify the ramp time for start is not too long. * Confirm the correct overload class is used. * Check that the Setting Ie parameter is correct.
P
paulritterSep 1, 2025
How to troubleshoot phase loss in ABB Controller?
- T
  Timothy LittleSep 1, 2025
  Check that the mains are connected and that no line contactor or breaker is open. Inspect the fuses for all 3 phases, replacing any that are blown. Verify the operation network supply and correct it if there's a power loss on one or multiple phases. Ensure the contactor/breaker or external switch device is closed. If the line contactor opens too quickly at stop, control it with the Run signal relay on terminal 4, adding a time relay before the contactor opens. If Stop Ramp is not necessary, set Stop mode to direct stop.
R
robert88Aug 30, 2025
What to do if my ABB PSTX370 motor does not start when given a start command by the hardwire inputs?
- J
  janetgatesAug 31, 2025
  First, check the connections for start and stop. Make sure that the start and stop commands are not given at the same time. Ensure that the keypad is not in Local Control mode; if it is, push the R\L-key to change to Remote Control mode. Also, verify that the Fieldbus control parameter is set to No. Finally, reset any active or tripping events.
E
Elizabeth MooreAug 29, 2025
What does 'Thyristor overload' mean on my ABB PSTX370 Controller?
- B
  bondjonAug 29, 2025
  A thyristor overload indicates that the thyristors are too hot. Check the start conditions and the fans. If possible, decrease the current limit. Allow the temperature of the thyristors to decrease before restarting.
C
Charles AriasAug 28, 2025
What should I do if my ABB PSTX370 displays 'Heatsink overtemperature'?
- A
  Ashley JonesAug 28, 2025
  Ensure that the fans are functioning correctly and that the airways are free from dirt and dust. Also, verify that the ambient temperature is not too high. If the fault persists after a reset, the heatsink is still too hot and needs to cool down.
M
martinezmathewAug 27, 2025
What does it mean when my ABB PSTX370 displays 'Under voltage'?
- K
  kathryn17Aug 27, 2025
  An undervoltage error indicates that the main voltage is too low. Perform a check of the main voltage.
J
Jacob EatonAug 27, 2025
What does it mean when my ABB Controller displays 'Overvoltage'?
- N
  nyoungAug 27, 2025
  An overvoltage error indicates that the main voltage is too high. Perform a check of the main voltage.
C
Christopher OdonnellAug 25, 2025
What should I do if my ABB PSTX370 displays 'Locked rotor'?
- D
  David ColeAug 26, 2025
  Examine the bearings of the motor and the load to ensure they run easily. A damaged bearing or a load stock could be the cause.
R
Richard MooreAug 25, 2025
What does it mean when my ABB PSTX370 Controller displays 'Ground fault'?
- G
  george17Aug 25, 2025
  A ground fault indicates that the sum of the instantaneous line currents in your 3-phase system differs more than the specified value. Examine the motor cables and the motor itself for any issues.

ABB PSTX370 Specifications

General

Product Type	Softstarter
Rated Operational Current - In Line Connection	370 A
Rated Operational Current - Inside Delta Connection	640 A
Enclosure Rating	IP00
Rated Frequency	50/60 Hz
Overload Protection	Yes
Coasting Stop	Yes
Built-in Bypass Contactor	Yes
Degree of Protection	IP00
Communication Options	Modbus RTU
Protection Features	Overload protection
Trip Class	10
Initial Voltage During Start	Adjustable 30-70%
Ramp Time	30 s

Summary

1 Read this first

2 Description

3 Mounting

4 Connection

Electrical Connection Safety

Critical safety warnings for handling hazardous voltage, installation, and power supply connection.

Main Circuit Connection

Instructions for connecting the main power circuit to the softstarter terminals.

4 Connection

Control Supply and Earthing Connections

Guidelines for connecting control supply voltage and functional earth to the softstarter.

Start/Stop and Input/Output Connections

Instructions for connecting start/stop circuits, programmable inputs, and signal output relays.

4 Connection

Interface Connections and Operation

Details on switching operational voltage, Modbus, sensor, and analog output interfaces.

5 Human Machine Interface (HMI)

HMI Component Overview

Detailed description of all Human Machine Interface (HMI) components and their functions.

6 Softstarter Settings

Initial Setup and Assistants

Procedures for first start-up using the assistant and configuration menu.

Motor Current Configuration Note

Important note on setting the motor rated current 'le' based on connection type.

6 Softstarter Settings

Navigation and Parameter Settings

Guide to navigating the HMI and setting operational parameters.

6 Softstarter Settings

Options Settings and Warnings

Overview of option menus and a critical warning about unexpected motor starts.

7 Troubleshooting

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