Three-phase electric motor: 3LC-355LX2B-6, 400 kW
| Basic technical data | |
| Motor type | 3LC-355LX2B-6 |
| Rated power (kW) | 400 |
| Frame size (mm) | 355 |
| Number of poles | 6 |
| Rated speed (rpm) | 990 |
| Frequency (Hz) | 50 |
| Electrical parameters | |
| Rated voltage (V) | 400/690 |
| Connection | △/Y |
| Rated current 400 V (A) | 677 |
| Rated current 690 V (A) | 392 |
| Efficiency at 100% load (%) | 95,8 |
| Efficiency class | IE3 |
| Power factor at 100% load | 0,89 |
| Starting and torque characteristics | |
| Locked-rotor torque ratio (LRT/RLT) | 1,3 |
| Breakdown torque ratio (BDT/RLT) | 2 |
| Locked-rotor current ratio (LRA/RLA) | 6,5 |
| 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) | 2300 |
| Bearings and lubrication | |
| DE/NDE bearings | 6322-C3/6322-C3 |
| Lubricant | Lithium-based grease No. 2 (temperature class) |
| Accessories | |
| 3 x PTC thermistor | |
An output of 400 kW, rated speed of 990 rpm and 400/690 V supply form the basis of a solution that delivers the efficiency and value of the 3LC-355LX2B-6 model in practice. This 6-pole electric motor is designed for operations where not only delivered power but also running stability, energy balance and long-term spare-part availability in heavily loaded drives are monitored. In the segment of large factories and OEM assemblies, it makes sense where an asynchronous electric motor must operate steadily without unnecessary downtime.
6-pole electric motor for stable operation of large technologies
Production-hall operators and integrators of technological systems need a motor that can handle long working cycles while maintaining predictable behaviour during starting and changing loads. IE3 efficiency class helps reduce energy demand during normal operation and supports more economical operation of the entire drive. In practice, this is valuable in applications where every kilowatt-hour is monitored and drive technology affects the overall cost of the line.
The 3LC PRO model performs well wherever strict operating discipline, service availability and robust construction for continuous duty are important. As an IE3 electric motor, it offers a sensible balance between efficiency, operating reserve and integration space within existing drive assemblies.
Robust cast-iron frame for long cycles and reduced maintenance
The robust cast-iron frame increases motor rigidity during installation and throughout long operating intervals. Reinforced cast-iron bearing shields and reinforced cast-iron feet help maintain accurate rotor positioning and reduce the risk of unwanted vibration in heavier assemblies. This solution suits lines where consistent mounting geometry and resistance to mechanical stress are important.
In this asynchronous electric motor, construction also plays a decisive role when connecting to gearboxes, pumps or compressor systems. More than 15 years of experience in industrial drives is reflected in the emphasis on functionality, service interventions and suitability for repeated starting in demanding operations.
Starting and electrical behaviour under load
A starting torque ratio of 1.3 and starting current ratio of 6.5 are important when designing drives that start under load or against process resistance. Rated current of 677 A at △ 400V and 392 A at Y 690V allows the connection to be selected according to the specific system and switchboard infrastructure. A power factor of 0.89 supports better use of supplied electrical energy during the normal working cycle.
A breakdown torque ratio of 2 provides reserve capacity during transient states and short-term increases in resistance in the mechanical system. Efficiency of 95.8% helps keep power losses at a level favourable for continuous operation of large production technologies.
Where 400 kW output is used most effectively
This motor is suitable for situations where high mechanical energy and stable operation are both required. Specific applications include:
- Main conveyor lines in steelworks.
- Process pumps for chemical operations.
- Compressor stations in industrial sites.
- Mills for processing mineral raw materials.
- Crushing lines in the stone industry.
- Fan units for drying tunnels.
- Extruders in the production of plastic semi-finished products.
- Filter-press drives in sludge-treatment plants.
- Rotary mixers in cement-production technology.
- Pump units for cooling circuits.
- Screw conveyors for bulk materials.
- Winding machines in the paper industry.
Bearings and connection prepared for industrial deployment
DE bearing 6322-C3 and NDE bearing 6322-C3 are selected as a reliable bearing combination for higher loads and longer operating life. The 2-M63X1.5 cable glands simplify adaptation of the supply during installation in switchboard and machine assemblies. A noise level of 95 dB(A) must be taken into account in workplace design and when planning acoustic measures in the hall.
Scope for service planning in every line
A package weight of 2300 kg is a practical value for logistics, lifting and preparation for installation into the technological system. A motor of this size requires handling to be planned before dispatch, which is a standard step in industrial projects involving large assemblies. Thanks to its robust design, it integrates better into projects focused on long-term operation without frequent intervention.
If you need a solution for demanding drive technology with an emphasis on efficiency, mechanical durability and long operating life, order model 3LC-355LX2B-6 without delay. Stock availability is intended for projects where timing and precise installation planning are decisive.