Electric motor 75 kW, 2980 rpm, 400 V / 690 V, 4LC-280S-2 LV

Insufficiently stable drive in pumps, fans, compressors and large machines increases downtime as well as energy costs. Model 4LC-280S-2 with an output of 75 kW belongs to the speed class 2900-3000 rpm and is designed to maintain operation in low-voltage networks with lower electricity consumption and less thermal stress. In practice, this is a solution that helps reduce total operating costs without unnecessary compromises in power reserves.

IE4 efficiency supports the long-term economics of the drive

This low-voltage asynchronous electric motor uses a concept that meets the requirements of operations focused on energy-saving industrial motors. In such a solution, advanced materials, sophisticated windings and optimised air gaps are decisive, because it is precisely these that help maintain high efficiency under stable load. Under rated conditions, it achieves an efficiency of 95.6 % and a power factor of 0.89, which is especially advantageous where the motor runs for many hours a day.

• Rated current at delta connection 400 V is 126 A.
• Rated current at Y connection 690 V is 73.04 A.
• Rated speed reaches 2980 rpm.
• The ratio of starting torque Tst/Tn is 1.8.
• The ratio of breakdown torque Tmax/Tn is 2.3.
• The ratio of starting current Ist/In is 8.5.
• Noise level reaches 91 dB(A).

Speed range 2900-3000 rpm for direct industrial use

In this speed range, the motor behaves as a reliable 2-pole electric motor for direct drives, where compact design and quick response to load changes are important. Rotor inertia of 1.1 kg*m² supports smooth starting and helps in applications with more frequent starts. For integration into switchboards and cable routes, 2-M63X1.5 cable glands are available, while both DE and NDE bearings are type 6314-C3 and are prepared for a long service life.

Technical design for service and installation

Packing weight of 517 kg and packing dimensions of 1102*652*846 mm make it easier to plan handling on site and in the workshop. The equipment includes 3 PTC thermistors, which help protect the winding under higher thermal load. In environments with large fans, pumps or compressors, this makes it possible to better manage operational safety and prevent drive damage under non-standard conditions.

• Pumps with long-term constant load.
• Ventilation units with high air flow.
• Compressors with demanding starting.
• Conveyor belts in large production plants.
• Grinding and mixing technologies.
• Aggregate drives in the energy sector.
• Process lines with continuous operation.
• Machine equipment with low-voltage supply.
• Pumping stations for process media.
• Cooling and extraction systems.
• Industrial blocks with a requirement for high efficiency.

If you need a reliable drive for long operation and reasonable energy costs, 4LC-280S-2 with an output of 75 kW is ready for professional use. VYBO Electric supplies proven solutions for industrial applications, and we will be happy to help you choose a suitable configuration.