The ABB PSTB570-600-70 is a softstarter rated 570 A for in-line connection, with a main circuit voltage range of 208...600 V AC and a control supply of 110...240 V 50/60 Hz. It combines a broad operational voltage window with built-in electronic overload protection, making it a precise choice for heavy-duty motor starting in industrial networks.
What does the ABB PSTB570-600-70 offer for high-current motor starting?
Engineering teams select this softstarter when starting current must be controlled without adding external overload relays. The device provides a current limit function adjustable from 1.5...7xIe, a ramp time of 0...120 second, and initial voltage during start of 30...70 %. These parameters allow exact tuning of the starting profile to the driven load.
Inside delta connection extends the usable current range. In this configuration, the rated operational current reaches 987 A, and the rated operational power is 540 kW at 400 V or 700 kW at 500 V. For in-line connection, the corresponding power ratings are 315 kW at 400 V and 400 kW at 500 V. A dedicated switch for inside delta connection is included.
Technical specifications at a glance
- Rated operational voltage: Main circuit 208...600 V AC
- Rated control circuit voltage: DC operation 24 V
- Rated operational current: 570 A in-line, 987 A inside delta
- Rated frequency: 50/60 Hz
- Overload protection: Built-in electronic overload protection
- Current limit function: 1.5...7xIe
- Analog outputs: 0...10 volts, 0...20 mA, 4...20 mA
- Degree of protection: Main terminals IP00 according to IEC 60529
- Ambient air temperature: Operation 0...+50 °C, storage -25...+70 °C
- Dimensions: 436 mm width, 515 mm height, 381 mm depth; 52 kg net weight
The service factor percentage is 115 %, and the starting capacity at maximum rated current Ie is 3xIe for 15s. Four signal relays are available: run, by-pass, fault, and overload. LED indicators show ready-to-start/standby (green), protection (yellow), and fault (red).
How does This unit integrate into control systems?
Communication uses a FieldBusPlug as standard, which simplifies connection to common fieldbus architectures. Integration note: wiring into a fieldbus network may require an external gateway or connection module. Confirm cable and gateway compatibility with AutoDCSTech before commissioning.
Main circuit terminals are bars with a hole diameter of 12.5 mm and a width and thickness of 40x6 mm. Control and supply circuits accept rigid conductors of 1 x 2.5 mm² or 2 x 1.5 mm². Tightening torque is 45 N·m for the main circuit and 0.5 N·m for control and supply circuits.
Where is this softstarter typically applied?
Heavy pumps, compressors, and conveyors benefit from the controlled ramp and current limit. Because the softstarter supports 10 starts per hour at 3.5xIe for 7 seconds with 50 % on time and 50 % off time, it suits duty cycles that demand repeated starts. Inside delta connection is useful where the motor windings are accessible and higher power is needed without upgrading the supply.
Maintenance and reliability considerations
Periodic inspection of terminal torque and cooling airflow is recommended. The built-in electronic overload protection reduces dependence on separate relays, yet the fault and overload signal relays should be monitored for early diagnosis. Ambient temperature must remain within 0...+50 °C during operation to preserve the specified service factor.
Contact AutoDCSTech with your exact requirements for precise matching and engineering-grade support on the ABB unit.
Availability & Condition at AutoDCSTech
| Part Number | PSTB570-600-70 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | Switzerland |
