Three-phase electric motor: 3LC-355L2-2, 315 kW
| Basic technical data | |
| Motor type | 3LC-355L2-2 |
| Rated power (kW) | 315 |
| 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) | 522 |
| Rated current 690 V (A) | 303 |
| 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) | 3,903 |
| 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) | 1802 |
| Bearings and lubrication | |
| DE/NDE bearings | 6319-C3/6319-C3 |
| Lubricant | Lithium-based grease No. 2 (temperature class) |
| Accessories | |
| 3 x PTC thermistor | |
IE3 efficiency class for a 2-pole electric motor in demanding production
IE3 efficiency class enables operation where energy consumption translates into lower costs without unnecessary reduction of power reserve. The 3LC-355L2-2 model offers an excellent balance between purchase price and energy savings, which is important in industrial operation involving long shifts, high loads and stable technological processes. This 2-pole electric motor is suitable where fast drive response and reasonable operating costs are both required.
In practice, its parameters are valuable to operators of large factories and OEM manufacturers of large technological units dealing with efficiency, service availability and integration into existing lines. As an IE3 electric motor, it helps reduce energy losses in applications where the motor runs for many hours each day. In such use, the difference becomes apparent quickly without requiring compromises in drive sizing.
Robust cast-iron frame for stability in continuous operation
The robust cast-iron frame increases resistance to vibration and mechanical stress generated during starting, load changes and irregular operation. Reinforced cast-iron bearing shields and reinforced cast-iron feet support mounting rigidity and transfer forces more effectively into the machine base frame. In production drive technology, this helps maintain accurate geometry and a longer service life of the assembly.
Rated current of △ 400V: 522 A and Y 690V: 303 A also assists drive sizing by allowing the motor to be matched to the power system of the specific plant. A rated speed of 2980 rpm gives this three-phase motor characteristics suited to applications requiring fast and stable operation. A power factor of 0.91 and efficiency of 95.8% support economical performance even under long-term load.
Starting and operating reserve in technological units
A starting torque ratio of 1.6, breakdown torque ratio of 2.2 and starting current ratio of 7.2 are important when designing a system in which the motor starts under mechanical load or through a gearbox. Rotor inertia of 3.903 kg/m² helps designers estimate acceleration and braking dynamics. A noise level of 100 dB(A) must be considered when installing the motor in halls with higher requirements for acoustic comfort and operator protection.
Practical industrial use and service reliability
The 3LC-355L2-2 is based on a design proven in thousands of industrial installations and is therefore suitable where repeatable reliability matters. Both DE bearing 6319-C3 and NDE bearing 6319-C3 are designed for higher loads and help maintain smooth operation with the correct lubrication regime. A packaging weight of 1802 kg and packaging dimensions of 1607×822×1161 mm simplify transport and handling planning when the motor arrives on site or at a service warehouse.
A 2-pole electric motor of this class performs well in applications requiring power reserve and stable continuous operation. Combined with modern drive technology, it can serve equipment that cannot afford unplanned shutdowns. For OEM customers, it means easier integration into their own machines, while operators benefit from a lower risk of unbalanced operating behaviour.
Typical heavy-duty applications
This motor is suitable for the following specific applications:
- Main drive for a centrifugal compressor in chemical production.
- Rotary mixer drive in a process tank for slurry processing.
- Belt-conveyor drive unit in a cement production line.
- Flue-gas fan drive for a heating-plant unit.
- Motor for a cooling-water pump in a power-generation unit.
- Direct crusher drive in aggregate processing.
If you need a motor for long-term operation with an emphasis on energy performance, mechanical durability and predictable servicing, the 3LC-355L2-2 is ready for industrial use. Take advantage of the offer and obtain a solution that supports both process reliability and economical operation.