PSTB720-600-70 ABB High Power Softstarter
PSTB720-600-70 is a heavy-duty soft starter from ABB designed for large industrial motors.
It reduces mechanical stress during motor startup.
The unit controls current and voltage during acceleration.
It supports motors used in pumps, compressors, fans, and conveyors.
Main Product Advantages
- PSTB720-600-70 supports smooth motor starting and stopping.
- Rated operational current reaches 720 A.
- Supports motor power up to 400 kW at 400 V.
- Reduces electrical shock during motor start.
- Built-in electronic overload protection improves safety.
- Supports inside-delta connection for large motors.
- Helps extend motor lifetime and reduce maintenance cost.
- Integrated bypass relay lowers energy loss during operation.
Electrical Performance
- Brand: ABB
- Model: PSTB720-600-70
- Product Type: Industrial Soft Starter
- Main Circuit Voltage: 208…600 V AC
- Rated Current: 720 A
- Control Supply Voltage: 100…250 V AC
- Control Circuit Voltage: 24 V DC
- Rated Frequency: 50 / 60 Hz
- Maximum Motor Power: 400 kW at 400 V
- Maximum Motor Power: 500 kW at 500 V
- Inside Delta Motor Power: 710 kW at 400 V
- Inside Delta Motor Power: 880 kW at 500 V
- Service Factor: 115%
Motor Starting Control Features
- Adjustable ramp start time from 0 to 120 seconds.
- Initial voltage adjustable between 30% and 70%.
- Step down voltage ramp from 100% to 30%.
- Current limit adjustable from 1.5 to 7 times rated current.
- Maximum start capacity: 3 × rated current for 15 seconds.
- Up to 10 motor starts per hour at high load.
Monitoring and Output Signals
- Run signal relay output.
- Bypass signal relay output.
- Fault relay signal for alarm system.
- Overload signal relay.
- Analog output options: 0-10 V.
- Analog output options: 0-20 mA.
- Analog output options: 4-20 mA.
Visual Status Indicators
- Green LED indicates ready or standby mode.
- Yellow LED shows protection status.
- Red LED indicates system fault.
- Clear LED indicators help fast troubleshooting.
Mechanical and Installation Details
- Product width: 436 mm.
- Product height: 515 mm.
- Product depth: 381 mm.
- Net weight: 55 kg.
- Main circuit connection: bar terminals.
- Main circuit tightening torque: 45 Nm.
- Control circuit tightening torque: 0.5 Nm.
Operating Environment
- Operating temperature: 0°C to 50°C.
- Storage temperature: −25°C to 70°C.
- Protection level: IP00 for main terminals.
- Designed for industrial electrical cabinets.
- Complies with IEC and industrial electrical standards.
Communication and Expansion
- Supports FieldBusPlug communication interface.
- Allows integration with industrial automation networks.
- Suitable for motor control centers.
- Supports monitoring through control systems.
Typical Applications
- Industrial pump stations.
- Large ventilation fan motors.
- Conveyor drive systems.
- Mining and cement equipment.
- Water treatment plants.
Packing Information
- 1 × PSTB720-600-70 ABB Softstarter
- 1 × factory test certificate
- 1 × industrial protective packaging
Shipping and Warranty
- Delivery available through FedEx, DHL, and UPS.
- Safe packaging prevents transport damage.
- 12-month warranty against manufacturing defects.
- Technical support available for installation and setup.
Contact Information
- Email: info@oiltechcontrols.com
- WhatsApp: +86 158 8020 0923
Frequently Asked Questions
- What is the main function of the PSTB720-600-70?
- It controls motor startup current and protects large motors from electrical stress.
- When should engineers use inside-delta connection?
- Inside delta helps reduce current load when controlling large motors.
- How can users set the start ramp time?
- The ramp time can be adjusted between 0 and 120 seconds in the controller settings.
- What factors should buyers check before choosing a soft starter?
- Motor current, voltage rating, load type, and start frequency must match the starter capacity.
- What common issues may appear during installation?
- Loose terminals, wrong voltage settings, or poor cooling may cause startup faults.
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