Three-phase electric motor: 3LC-355LX1A-2, 355 kW
| Basic technical data | |
| Motor type | 3LC-355LX1A-2 |
| Rated power (kW) | 355 |
| Frame size (mm) | 355 |
| Number of poles | 2 |
| Rated speed (rpm) | 2985 |
| Frequency (Hz) | 50 |
| Electrical parameters | |
| Rated voltage (V) | 400/690 |
| Connection | △/Y |
| Rated current 400 V (A) | 581 |
| Rated current 690 V (A) | 337 |
| Efficiency at 100% load (%) | 95,8 |
| Efficiency class | IE3 |
| Power factor at 100% load | 0,92 |
| 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) | 1900 |
| Bearings and lubrication | |
| DE/NDE bearings | 6319-C3/6319-C3 |
| Lubricant | Lithium-based grease No. 2 (temperature class) |
| Accessories | |
| 3 x PTC thermistor | |
The design of the 3LC-355LX1A-2 provides efficiency and value where a two-pole electric motor operates continuously, under high load and with minimal room for downtime. For operators of large factories and OEM manufacturers of large technological units, it is essential that the drive maintains stable speed, handles repeated loaded starts and simultaneously maintains energy efficiency at a level that makes sense in total operating costs.
Robust cast-iron frame for long production shifts
The robust cast-iron frame is designed for industrial environments where resistance to vibration, accurate mounting and stability under long-term stress are expected from the motor.
- Reinforced cast-iron bearing shields help maintain assembly rigidity even under high mechanical load.
- Reinforced cast-iron feet reduce the risk of unwanted movement when mounted on robust machines and units.
- 6319-C3 bearings on both the DE and NDE sides support reliable operation where continuity requirements are high.
In practice, these features are valuable in continuously loaded lines where the motor is integrated into technological units with little room for frequent shutdowns. ISO certificates also provide a clear framework for maintenance and quality teams in purchasing and service processes.
IE3 for lower losses under continuous load
IE3 efficiency class – Super High Efficiency supports energy efficiency during long-term operation, which is particularly important where the motor runs for a high number of hours each year and every reduction in losses affects both maintenance and energy budgets.
This three-phase electric motor is suitable for solutions where stable output, accurate alignment with operating modes and long-term return on investment are monitored. Compatibility with a 400 V network is also important for integrators and assembly manufacturers, since a 400 V electric motor can be incorporated directly into standard industrial configurations.
2985 rpm for high-dynamic processes
A rated speed of 2985 rpm provides operating characteristics suited to pumps, fans, compressors and other technological units where rapid achievement of the operating point and consistent transmission characteristics are required.
- Pumps for cooling circuits in steelworks.
- Process fans in timber-production drying plants.
- Compressor stations for pneumatic distribution systems.
- Main mixers in chemical lines.
- Extruders in plastics production.
- Conveyor drives in packaging centres.
- Aggregate crushers in quarries.
- Pumping units for water-treatment technology.
- Process fans in cement plants.
- Briquetting presses in biomass processing.
- Process mixers in food-production facilities.
For a two-pole electric motor in this power class, the decisive advantage is its suitability for production with a precisely defined operating rhythm where stable performance without unnecessary fluctuations is required.
Current and torque ratios for starting under load
Rated current of 581 A at △ 400V and 337 A at Y 690V gives designers the data required for sizing switching equipment, protection and cable routes. A starting torque ratio of 1.4, breakdown torque ratio of 2 and starting current ratio of 7 support design in applications where starting is coordinated with the mechanical system. A noise level of 95 dB(A) and a packaging weight of 1900 kg are parameters that require appropriate planning for handling, installation and operating acoustics.
Industrial teams working with large pumping stations, technological lines or OEM assemblies will value the fact that this three-phase electric motor enables a drive to be designed with an emphasis on operating stability and predictable servicing. From a supply perspective, it is therefore advisable to order the motor in good time so installation and service continuity are maintained without delay.