Eaton DS7-340SX081N0-N Soft Starter, 81A, 200-480V AC, 50/60 Hz, IP20

The Eaton DS7-340SX081N0-N is a high-performance soft starter engineered for precise and efficient control of three-phase motors. Designed to facilitate smooth acceleration and deceleration, this device effectively minimizes mechanical stress on drive components and reduces electrical surges during motor start-up. With a rated operational current of 81A and support for a wide voltage range of 200-480V AC, it provides a robust solution for demanding industrial applications requiring reliable motor management.

Advantages

This soft starter features internal bypass contacts that significantly improve energy efficiency by reducing heat dissipation during steady-state operation. Its compact design allows for space-saving installation within control cabinets, while the integrated control logic ensures consistent performance across various load conditions. By providing controlled voltage ramping, the unit extends the service life of motors and connected mechanical systems such as belts, gears, and couplings.

Suitable for

• Industrial conveyor systems
• Pump control applications
• Ventilation and fan systems
• Compressor motor starting
• General machinery requiring smooth acceleration

This device may not be suitable for applications requiring frequent high-torque starts or complex speed control, as it is designed specifically for soft starting and stopping rather than variable frequency drive functionality. It is also not intended for use in environments where protection higher than IP20 is required without an additional protective enclosure.

Key specifications

• Rated operational current: 81A
• Input voltage range: 200-480V AC
• Control voltage: 24V AC/DC
• Motor rating at 400V: 45 kW
• Start-up time: up to 30 seconds
• Protection rating: IP20
• Standards: IEC/EN 60947-4-2, UL 508, CSA22.2-14

To use the Eaton DS7-340SX081N0-N, ensure the device is mounted in a vertical position within a suitable electrical enclosure to maintain the IP20 rating. Connect the three-phase power supply to the input terminals and the motor leads to the output terminals, ensuring all wiring complies with local electrical codes. Apply the 24V AC/DC control signal to initiate the soft start sequence. Configuration of the start-up parameters should be performed according to the specific load requirements of the connected motor.

What to consider before purchase

• Verify that the motor current rating does not exceed 81A.
• Ensure the control voltage of 24V AC/DC is available in your control circuit.
• Check that the installation environment meets the IP20 protection requirements.
• Confirm the physical dimensions (93 x 139 x 175 mm) fit within your existing panel space.

Always ensure that the power supply is disconnected before performing any wiring or maintenance tasks. Regularly inspect the terminal connections for tightness to prevent overheating and ensure optimal electrical contact.