Electric motor 75 kW, 1490 rpm, 400 V / 690 V, 4LC-280S-4 LV

Uneven load, frequent starting and pressure on the energy balance are among the most common problems in the drives of pumps, fans, compressors and large machines. That is precisely why the 4LC-280S-4 model with an output of 75 kW is designed for operation in the 1400-1500 rpm range, where it can deliver noticeable cost savings while maintaining a high level of operational reliability. In low-voltage installations, as a low-voltage asynchronous electric motor, it helps maintain stable performance even during longer operating cycles and at higher loads.

IE4 efficiency reduces energy losses in continuous operation

The design with 96 % efficiency and a power factor of 0.87 supports economical operation where the motor runs under load for much of the day. In practice, this is especially appreciated by energy-saving industrial motors intended for applications where every kilowatt hour is monitored. For the operator, this means lower thermal losses, lower cooling requirements and a better ratio between power drawn from the mains and mechanical output on the shaft.

Design features for long service life and easier integration

The IEC frame of 280 mm makes it easier to integrate the motor into existing assemblies, and the dimensional consistency helps when replacing older drives without intervention in the entire technology. 2-M63X1.5 cable entries simplify the connection of power cables, the 6317-C3 bearings on both the DE and NDE sides contribute to reliable operation, and 3 PTC thermistors provide important protection for the winding under higher thermal stress. The rotor inertia of 2.2 kg*m² supports smooth starting during controlled starts.

Operating parameters help manage starting and overload conditions

For technologies with higher starting requirements, the starting torque ratio Tst/Tn 2, the breakdown torque ratio Tmax/Tn 2.3 and the starting current ratio Ist/In 8.5 are important. These values are significant in pumping systems, ventilation systems and engineering applications, where the motor faces starting resistance and short-term overload. Noise level of 80 dB(A) corresponds to a robust industrial design that is suitable for production halls and technical rooms.

Use in demanding industrial operations

• Pumps with long daily operation and a requirement for stable pressure.
• Fans for ventilation systems, extraction hoods and cooling circuits.
• Compressors in compressed air systems and service compressor stations.
• Drives for conveyors and process lines with regular loading.
• Agitators and stirring equipment in the process industry.
• Pressing and forming machines with high starting torque.
• Production units with continuous operation in low-voltage infrastructure.
• Cooling units and fan assemblies in the energy sector.
• Food and packaging technology with a requirement for reliable operation.
• Main drives where an exact replacement for a 400/690 V motor is required.

Transport and installation make drive replacement planning easier

The packed weight of 570 kg and packed dimensions of 1102*652*846 mm are important for logistics, handling and preparation of the installation site. Accurate data on the bearings, cable protection and current parameters allow service teams to assess compatibility with the existing technology more quickly. In combination with the professional product range of the VYBO Electric brand, the plant gains a motor suitable for long-term deployment as well as a replacement in modernised lines. If you need a reliable drive with high efficiency, send us a non-binding enquiry and we will propose a suitable solution for your operation.