Electric motor 400 kW, 2985 rpm, 400 V / 690 V, 4LC-355LX1B-2 LV

A solution with an IE2 or IE3 class leaves higher losses at this level of output, whereas IE4 reduces energy consumption in long-term operation typically by 15 % to 20 % compared with IE3. The 4LC-355LX1B-2 model, with an output of 400 kW and a rated speed of 2985 rpm, belongs to the 2900-3000 rpm speed class, where it is fully suited to drives requiring stable torque, high efficiency and reliable operation in heavy-duty production lines. In this category, the three-phase motor makes sense especially where continuous operation, energy efficiency and long service life are decisive.

IE4 efficiency reduces operating costs at high output

At 400 V, the rated current is △ 655 A, and at 690 V the rated current Y 380 A, which makes it possible to adapt the connection to the specific power distribution system. An efficiency of 96.7 % together with a power factor of 0.91 helps reduce the load on the supply infrastructure and limits unwanted thermal losses in the motor and in the associated components. The noise level of 95 dB(A) corresponds to robust industrial use, where performance and durability are the primary considerations. In practice, this is a solution suitable for operations that focus not only on immediate output, but also on costs throughout the entire service life of the drive.

Design intended for continuous load and mechanical durability

The frame size according to IEC 355 mm provides a solid foundation for integration into larger drive assemblies. The substantial cast iron construction is designed to help absorb vibrations while also protecting the motor from the effects of a harsh environment. The DE bearing 6319-C3 and the NDE bearing 6319-C3 support stable operation under higher radial load and during long-term operation. The 2-M63X1.5 cable glands make connection easier in space-demanding installations, and the 3 PTC thermistors improve winding temperature monitoring in critical operating modes.

High-speed applications and drives in demanding operations

The high rated speed supports use in technologies where dynamics and output stability are important. Super premium efficiency is advantageous in long-term operation in energy-intensive lines, where every point of efficiency is reflected in operating costs. The starting torque ratio Tst/Tn 1.6 and the breakdown torque ratio Tmax/Tn 2.2 define behaviour at start-up and under load at the operating point. The starting current ratio Ist/In 8.5 must be taken into account when designing the control panel, starting system and protective elements, especially in networks with higher demands on electrical coordination. A packaging weight of 2000 kg also indicates that this is equipment intended for robust assembly and handling processes.

Typical industrial applications

The motor is suitable for pumps for large media flow, fans in process systems, compressors, mixers, crushers, conveyors, rolling lines, extruders, winding equipment, wastewater treatment plants, power blocks, mining technologies, cement plant lines, metallurgical systems, paper machines and auxiliary drives in large production halls. In each of these cases, it is worth assessing the thermal reserve, starting mode and the available space for installation.

If you need a drive for heavy-duty production, the 4LC-355LX1B-2 with a speed of 2985 rpm offers a combination of high efficiency, robust cast iron construction and parameters suitable for direct industrial use. The VYBO Electric brand is based on its own research and development and is among the largest specialists in its field in Central Europe, so we can also provide technical advice for a specific application. Check the suitability of the motor for your application.