Three-phase electric motor: 3LC-355LX2B-4, 500 kW
| Basic technical data | |
| Motor type | 3LC-355LX2B-4 |
| Rated power (kW) | 500 |
| Frame size (mm) | 355 |
| Number of poles | 4 |
| Rated speed (rpm) | 1485 |
| Frequency (Hz) | 50 |
| Electrical parameters | |
| Rated voltage (V) | 400/690 |
| Connection | △/Y |
| Rated current 400 V (A) | 826 |
| Rated current 690 V (A) | 479 |
| Efficiency at 100% load (%) | 96 |
| Efficiency class | IE3 |
| Power factor at 100% load | 0,91 |
| Starting and torque characteristics | |
| Locked-rotor torque ratio (LRT/RLT) | 1,4 |
| Breakdown torque ratio (BDT/RLT) | 2 |
| Locked-rotor current ratio (LRA/RLA) | 7 |
| Rotor moment of inertia (kg·m²) | – |
| Applicable standards | |
| Specification | IEC60034-1 |
| Testing | IEC60034-2 |
| Noise | IEC60034-9 |
| Vibration | IEC60034-14 |
| Construction and operating data | |
| Mounting arrangement | IM B3, B5, B35, V1 |
| Duty type | S1 (S2, S3, S4 – S9 optional) |
| Load type | Parabolic or linear curve |
| Degree of protection | IP55 |
| Insulation class | F |
| Temperature rise class | B |
| Cooling method | IC411 |
| Starting method | DOL, VFD, soft starter |
| Direction of rotation | Both |
| Vibration (mm/s) | 2.8 |
| Cable glands | 2-M63X1.5 |
| Operating conditions | |
| Ambient temperature range | -20 to +40°C (-30, +50, +60 optionally) |
| Maximum installation altitude | up to 1000m |
| Packaging and dimensions | |
| Packaging dimensions (mm) | – |
| Package weight (kg) | 2200 |
| Bearings and lubrication | |
| DE/NDE bearings | 6322-C3/6322-C3 |
| Lubricant | Lithium-based grease No. 2 (temperature class) |
| Accessories | |
| 3 x PTC thermistor | |
3LC-355LX2B-4 is a 4-pole electric motor with a power output of 500 kW and a rated speed of 1485 rpm, designed for drives where stable operation, economical running and long service life are expected from the machine. In practice, it delivers the efficiency and value of the 3LC-355LX2B-4 model wherever operating costs, 24/7 availability and resistance to long-term loading in industrial production are decisive.
4-pole electric motor for continuous drive technology
A rated voltage of 400/690 V enables flexible connection to standard power systems in large facilities as well as technological units operating with higher loads during starting or variable process loads. A rated current of 826 A at △ 400V and 479 A at Y 690V provides a reliable basis for designing switchgear, protection and cable routes in demanding drive technology.
A starting torque ratio of 1.4, breakdown torque ratio of 2 and starting current ratio of 7 support starting even in applications where the inertia of the technology must be overcome without unnecessary stress on the power network. The IE3 electric motor also helps reduce energy losses during long daily operation and repeated duty cycles.
Robust cast-iron frame for demanding operation
A robust cast-iron frame is designed so the motor can withstand vibration, mechanical stress and long-term installation in assemblies with higher dynamic loading. Reinforced cast-iron bearing shields and reinforced cast-iron feet increase mounting rigidity and support stability in operations where running precision and durability of the entire assembly are monitored.
This construction is particularly beneficial for large factories and OEM manufacturers of large technological units that need to integrate the motor into a robust line without compromises in mechanical mounting reliability. An asynchronous electric motor in this design is better suited to operations requiring long intervals between service interventions and a high degree of repeatability.
IE3 efficiency class for lower consumption during long shifts
IE3 efficiency class is especially important where the motor runs for a large part of the day and every percentage difference in efficiency is reflected in energy bills. Efficiency of 96% and a power factor of 0.91 support economical operation under stable load, which in large production units results in better cost planning and lower thermal stress on the drive.
In projects where return on investment is evaluated, it is important that a 4-pole electric motor with this efficiency helps keep consumption under control without requiring a reduction in process performance. In many operations, this is where the difference becomes clear between a motor that merely drives the machine and one that helps make the entire process more efficient.
Bearing arrangement and service reliability in long-term use
DE bearing 6322-C3 and NDE bearing 6322-C3 are selected for operation where stable rotor mounting and reliable running under heavy load are expected. A packaged weight of 2200 kg reflects the robust construction suitable for production halls, technological units and installation assemblies with a rigid foundation.
A noise level of 95 dB(A) is an important input for workplace design, enclosure planning and overall acoustic hygiene in production. Cable glands 2-M63X1.5 simplify practical routing of the power supply during installation and service intervention, which is particularly appreciated where assembly must be completed within a limited shutdown window.
Typical industrial applications with high demands
The 3LC PRO model is suitable for operations requiring stable transfer of power to the machine technology. Typical applications include:
- Drive units for aggregate crushers in quarries and raw-material treatment plants.
- Drives for high-capacity pumps in industrial-water pumping stations.
- Process agitators in chemical processing under continuous load.
- Ventilation units for large industrial halls and production lines.
- Compressor stations for compressed-air distribution in factories.
- Drives for conveyor routes in metallurgy and material handling.
- Rolling and winding equipment in metal semi-finished-product manufacturing.
Practical experience for OEM projects and large factories
More than 15 years of experience with motors and drives is reflected above all in the fact that customers receive a solution suitable for real operation, not merely a catalogue item. In OEM projects, this means easier integration into the machine design, predictable electrical parameters and lower risk when commissioning the complete unit.
In large factories, spare-component availability and rapid shutdown planning are also important. This 4-pole electric motor combines power, robust mechanical construction and energy discipline that supports long-term operation without unnecessary intervention.
Ready for deployment without delaying the project
If you need a motor for a technological unit that must operate reliably at high power while keeping operating costs under control, the 3LC-355LX2B-4 is ready to meet these requirements. Order it in good time so you can plan installation, trial operation and line commissioning without unnecessary delay.
Stock and project deliveries should be handled promptly, because every day of downtime matters with drives of this power. Your order provides a motor prepared for demanding industrial use and the precise requirements of your technology.




