Eaton DS7-340SX070N0-N 3-Phase Soft Starter, 400VAC, 70A, 37kW, 24V AC/DC

The Eaton DS7-340SX070N0-N is a robust 3-phase soft starter engineered to provide precise and smooth control for industrial electric motors. Operating at a rated voltage of 400VAC, this device supports a power capacity of 37kW and a rated current of 70A. By managing the voltage supply during startup and shutdown, it effectively minimizes mechanical shock and electrical surges, thereby protecting the motor and connected drive components from premature wear.

Advantages

This soft starter offers a significant reduction in mechanical stress on belts, gears, and couplings by ensuring a gradual increase in torque during motor startup. Its compact design allows for efficient space utilization within control cabinets, while the integrated bypass technology reduces internal heat generation during steady-state operation. The device is highly reliable, supporting consistent performance in demanding industrial environments and contributing to the overall energy efficiency of the motor system.

Suitable for

• Conveyor belt systems
• Pumps and hydraulic systems
• Fans and ventilation units
• Compressors
• Centrifugal machinery

When it may not be suitable

This device is not intended for applications requiring high-torque starting or frequent reversing of the motor direction. It is also not suitable for use in environments exceeding the specified thermal or voltage ratings provided in the technical documentation.

Key specifications

• Rated operational voltage: 400VAC
• Rated operational current: 70A
• Motor power rating: 37kW
• Control voltage: 24V AC/DC
• Phase count: 3-phase

How to use

Installation should be performed by qualified personnel in accordance with local electrical regulations. The soft starter must be mounted vertically on a DIN rail or mounting plate to ensure proper airflow and cooling. Connect the main power supply to the input terminals and the motor leads to the output terminals. The 24V AC/DC control signal should be wired to the designated control inputs to initiate the start and stop sequences. Ensure all connections are tightened to the specified torque values before applying power.

What to consider before purchase

• Verify that the motor power rating matches the 37kW capacity of the soft starter.
• Ensure the 24V AC/DC control voltage supply is available in your control circuit.
• Check the physical dimensions to ensure compatibility with your existing electrical enclosure.
• Confirm that the 70A current rating is sufficient for your specific motor load requirements.

Usage recommendations

Regularly inspect the electrical connections for tightness and ensure that the ventilation paths around the unit remain clear of dust and debris to maintain optimal thermal performance.