Softstart PSE72-600-70 1SFA897107R7000

Motor soft starter – optimization and protection

Softstart PSE72-600-70 is an advanced device designed for smooth starting and stopping of three-phase motors. The use of a soft starter minimizes mechanical and electrical loads, which translates to extended motor life and the life of associated installation components. This device finds wide application in industry, where reliability and motor protection are key.

Construction and functionality

PSE72-600-70 features a built-in bypass contactor that takes over the full load after the start-up process is complete. This limits the load on the soft starter’s semiconductor elements, increasing its durability. Additionally, the device has a built-in motor overload protection, protecting it from damage caused by excessive load. It is equipped with a clear display, making configuration and monitoring of operating parameters easier. Control is via AC voltage (100-250V for 50/60Hz), and torque adjustment allows you to adapt the start-up parameters to the specifics of a given motor and application.

Applications and benefits

This soft starter is ideal for applications requiring limitation of inrush currents, such as pumps, fans, conveyor belts, and compressors. It provides smooth starting, reducing hydraulic shocks in pumps and minimizing chain wear in conveyors. Thanks to the ability to program current limitation, the start-up parameters can be precisely adapted to the requirements of the installation. The built-in bypass contactor eliminates power losses on semiconductor elements during normal motor operation. The device is adapted to work in harsh environmental conditions thanks to coated PCBs.

• Motor protection: Built-in overload protection protects the motor from damage caused by excessive load.
• Reduction of inrush currents: Limiting inrush currents reduces the load on the power supply network and associated devices.
• Extended lifespan: Smooth starting minimizes mechanical loads, which translates to a longer lifespan of the motor and drive components.
• Easy configuration: A clear display makes it easy to configure the device’s operating parameters.
• Wide voltage range: The ability to operate in the voltage range of 208…600 V AC ensures compatibility with various electrical installations.
• Versatility: Suitable for controlling motors up to 37 kW (at 400V).
• Adaptation to harsh conditions: Coated PCBs provide resistance to corrosion and the action of aggressive chemicals.
• Application with various types of loads: thanks to torque adjustment, it can be used with various types of applications - from light to heavy.

The device is characterized by a rated current of 72A and the ability to work with motors up to 37kW with a standard connection and 30kW with a star connection (at 400V). The IP00 protection class indicates that the device is intended for mounting inside electrical cabinets or protective enclosures.