Three-phase electric motor: 3LC-280M-6, 55 kW
| Basic technical data | |
| Motor type | 3LC-280M-6 |
| Rated power (kW) | 55 |
| Frame size (mm) | 280 |
| 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) | 98,1 |
| Rated current 690 V (A) | 56,87 |
| Efficiency at 100% load (%) | 94,1 |
| Efficiency class | IE3 |
| Power factor at 100% load | 0,86 |
| Starting and torque characteristics | |
| Locked-rotor torque ratio (LRT/RLT) | 2 |
| Breakdown torque ratio (BDT/RLT) | 2 |
| Locked-rotor current ratio (LRA/RLA) | 7,3 |
| Rotor moment of inertia (kg·m²) | 2,341 |
| 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) | 1152*652*846 |
| Package weight (kg) | 550 |
| Bearings and lubrication | |
| DE/NDE bearings | 6317-C3/6317-C3 |
| Lubricant | Lithium-based grease No. 2 (temperature class) |
| Accessories | |
| 3 x PTC thermistor | |
3LC PRO 3LC-280M-6 is designed as a 1000 rpm electric motor that delivers an ideal balance between purchase price and energy savings in everyday operation. In practice, this means the 3LC-280M-6 can maintain stable performance in light and medium industry, OEM assemblies and smaller technological units where precise integration and long-term operation without unnecessary intervention are expected.
A robust cast-iron frame is designed for applications where the motor operates under higher mechanical loads, frequent starts and strict alignment requirements. Reinforced cast-iron bearing shields and reinforced cast-iron feet help maintain drive geometry during long-term use on machine frames, conveyors and pumping assemblies. For installation teams, this means more rigid mounting and a lower risk of vibration being transmitted through the entire machine.
The combination of a rated power output of 55 kW, rated speed of 990 rpm and operation at 400/690 V gives designers flexibility when creating drives for real industrial use. When connected as a 400 V electric motor, the unit is suitable wherever reliable starting and consistent load characteristics are required. Three-phase electric motors in this class are often selected for applications that must not fluctuate during operation even over longer duty cycles.
1000 rpm electric motor for stable operation of production technologies
In operation, the key question is whether the drive maintains the same behaviour throughout the entire shift cycle. This three-phase electric motor is suitable wherever acceleration must be smooth and repeated starting is expected without excessive thermal stress. A starting torque ratio of 2 and starting current ratio of 7.3 give designers a sound basis for starting-system design in assemblies with higher inertia.
In typical practice, it is used in the following specific applications:
- belt-conveyor drive in a metal-parts production line,
- drive motor for a screw conveyor handling granulate in plastics production,
- mixer drive in a food-processing technological unit,
- motor for a centrifugal pump in a cooling circuit,
- fan drive in an extraction air-handling system,
- drive unit for a packaging machine with intermittent operation,
- mixing-equipment drive in a chemical dosing station,
- motor for a grinding station in a smaller engineering facility.
This type of application requires a motor that adapts to the technology, not the other way around. Rotor inertia of 2.341 kg/m² is therefore also important, supporting predictable starting in assemblies with greater load torque.
IE3 efficiency that helps keep operating costs under control
IE3 efficiency class is a practical choice for operations where the motor runs for many hours every day and every watt saved is reflected in annual costs. Super high efficiency in this type of drive is particularly evident under stable load, where it is important that energy is converted into useful output rather than unnecessary losses. Efficiency of 94.1% and a power factor of 0.86 help maintain a sensible electrical operating balance.
For OEM manufacturers, it is also important that the motor can be integrated into machines without complex modifications to enclosures and support frames. A packaged weight of 550 kg and package dimensions of 1152*652*846 mm simplify logistics and installation planning. Cable glands 2-M63X1.5 provide practical routing space for incoming conductors in industrial assemblies.
Bearing arrangement for long-term precision in operation
DE bearing 6317-C3 and NDE bearing 6317-C3 provide a solution for applications where reliable shaft support and resistance to long-term loading are expected. Combined with a noise level of 78 dB(A), the motor meets the requirements of industrial operation where not only performance but also acoustic behaviour in the hall and operator comfort are monitored.
ISO certificates in the manufacturing documentation confirm that the entire process is focused on repeatable deliveries and stable quality for serial deployment. For installers and purchasing teams, this simplifies the planning of replacements and service intervals within longer projects.
3LC PRO 3LC-280M-6 is suitable wherever the drive must be robust, economical and ready for real production loads. Take advantage of the offer and choose a motor that supports stable technology operation, lower running costs and reliable integration into your machinery.