Three-phase electric motor: 3LC-355M2-2, 250 kW
| Basic technical data | |
| Motor type | 3LC-355M2-2 |
| Rated power (kW) | 250 |
| Frame size (mm) | 355 |
| Number of poles | 2 |
| Rated speed (rpm) | 2980 |
| Frequency (Hz) | 50 |
| Electrical parameters | |
| Rated voltage (V) | 400/690 |
| Connection | △/Y |
| Rated current 400 V (A) | 414 |
| Rated current 690 V (A) | 240 |
| Efficiency at 100% load (%) | 95,8 |
| Efficiency class | IE3 |
| Power factor at 100% load | 0,91 |
| Starting and torque characteristics | |
| Locked-rotor torque ratio (LRT/RLT) | 1,6 |
| Breakdown torque ratio (BDT/RLT) | 2,2 |
| Locked-rotor current ratio (LRA/RLA) | 7,2 |
| Rotor moment of inertia (kg·m²) | 3,345 |
| 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) | 1607*822*1161 |
| Package weight (kg) | 1606 |
| Bearings and lubrication | |
| DE/NDE bearings | 6319-C3/6319-C3 |
| Lubricant | Lithium-based grease No. 2 (temperature class) |
| Accessories | |
| 3 x PTC thermistor | |
3000 rpm electric motor for stable performance in continuous operation
The 3LC-355M2-2 model provides efficiency and value for operations that need a reliable drive with a rated output of 250 kW and a speed of 2980 rpm. In medium-sized companies, large factories and industrial automation, a 3000 rpm electric motor is suitable where smooth starting, stable load and disciplined long-term operation are decisive.
IE3 efficiency class supports lower consumption under normal load and helps keep operating costs under control even in multi-shift production. This series of asynchronous electric motors is designed for applications where not only output but also resistance to frequent starts and long operating cycles is important.
Robust cast-iron frame for everyday production loads
A robust cast-iron frame, reinforced cast-iron bearing shields and reinforced cast-iron feet provide a rigid basis for installation in technological units. This solution is valued by engineers and designers who need to limit vibration, maintain accurate alignment and simplify servicing in demanding operation. An industrial electric motor with this construction withstands long-term mechanical load more effectively.
Parameters that simplify drive design and protection selection
Rated current of 414 A at △ 400V and 240 A at Y 690V helps when designing the power supply and sizing the switchboard. A starting current ratio of 7.2 and starting torque ratio of 1.6 provide designers with useful data when assessing starting under load. A breakdown torque ratio of 2.2 supports use in technological lines where adequate reserve during starting is required.
A power factor of 0.91 and efficiency of 95.8% are beneficial in applications with long daily operating periods. A noise level of 100 dB(A) should be considered when designing the workplace and enclosure, especially in areas with operators and service access.
Bearing arrangement and inertia for longer service intervals
Both DE bearing 6319-C3 and NDE bearing 6319-C3 support stable rotor mounting under loads typical of continuously operating production lines. Rotor inertia of 3.345 kg/m² helps assess acceleration and coast-down dynamics in systems where precise coordination with a gearbox, coupling or driven machine is important.
Packaging dimensions and logistics at the installation site
Packaging dimensions of 1607×822×1161 mm and a packaging weight of 1606 kg simplify transport, storage and handling planning at the installation site. In practice, this makes crane coordination, goods receipt and installation preparation easier without delaying production schedules.
Applications in equipment operating with precisely timed power
This type of electric motor is used in the following specific industrial applications:
- Centrifugal pumps for process water.
- Fans for large air-handling units.
- Compressor stations for production plants.
- Conveyor belts in packaging lines.
- Aggregate crushers in raw-material processing.
- Fine-grinding mills in food production.
- Extruders for plastic granules.
- Pressing units in metallurgical production.
- Rotary mixers in construction-material production.
- Briquetting presses in biomass processing.
- Separation systems in dusty environments.
- Winding machines in the paper industry.
The manufacturer’s years of experience are evident in a design that takes long-term load, service accessibility and stable industrial operation into account. When procuring a drive for a production line, this electric motor belongs among the solutions capable of repeated operation without unnecessary integration compromises.
Order the 3LC-355M2-2 in good time for a planned shutdown
If the objective is to combine output, robust construction and efficient operation, the 3LC-355M2-2 model is ready for demanding conditions. Order it in good time so installation and commissioning can take place as planned and the production technology does not have to wait for a replacement drive.